cobalt ← nickel → copper - ↑ Ni ↓ Pd 28Ni Periodic table
Appearance
lustrous, metallic, and silver with a gold tinge
General properties
Name, symbol, number	nickel, Ni, 28
Pronunciation	/ˈnɪkəl/
Element category	transition metal
Group, period, block	10, 4, d
Standard atomic weight	58.6934(4)(2)
Electron configuration	[Ar] 4s2 3d8 or [Ar] 4s1 3d9 (see text)
Electrons per shell	2, 8, 16, 2 or 2, 8, 17, 1 (Image)
Physical properties
Phase	solid
Density (near r.t.)	8.908 g·cm−3
Liquid density at m.p.	7.81 g·cm−3
Melting point	1728 K, 1455 °C, 2651 °F
Boiling point	3186 K, 2913 °C, 5275 °F
Heat of fusion	17.48 kJ·mol−1
Heat of vaporization	377.5 kJ·mol−1
Molar heat capacity	26.07 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1783 1950 2154 2410 2741 3184
Atomic properties
Oxidation states	4[1], 3, 2, 1 [2], -1 (mildly basic oxide)
Electronegativity	1.91 (Pauling scale)
Ionization energies (more)	1st: 737.1 kJ·mol−1
	2nd: 1753.0 kJ·mol−1
	3rd: 3395 kJ·mol−1
Atomic radius	124 pm
Covalent radius	124±4 pm
Van der Waals radius	163 pm
Miscellanea
Crystal structure	face-centered cubic
Magnetic ordering	ferromagnetic
Electrical resistivity	(20 °C) 69.3 nΩ·m
Thermal conductivity	90.9 W·m−1·K−1
Thermal expansion	(25 °C) 13.4 µm·m−1·K−1
Speed of sound (thin rod)	(r.t.) 4900 m·s−1
Young's modulus	200 GPa
Shear modulus	76 GPa
Bulk modulus	180 GPa
Poisson ratio	0.31
Mohs hardness	4.0
Vickers hardness	638 MPa
Brinell hardness	700 MPa
CAS registry number	7440-02-0
Most stable isotopes
Main article: Isotopes of nickel
iso NA half-life DM DE (MeV) DP 58Ni 68.077% 58Ni is stable with 30 neutrons 59Ni trace 76000 y ε - 59Co 60Ni 26.223% 60Ni is stable with 32 neutrons 61Ni 1.14% 61Ni is stable with 33 neutrons 62Ni 3.634% 62Ni is stable with 34 neutrons 63Ni syn 100.1 y β− 0.0669 63Cu 64Ni 0.926% 64Ni is stable with 36 neutrons
v t e · r

Nickel ( /ˈnɪkəl/ NI-kəl) is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Pure nickel shows a significant chemical activity that can be observed when nickel is powdered to maximize the exposed surface area on which reactions can occur, but larger pieces of the metal are slow to react with air at ambient conditions due to the formation of a protective oxide surface. Even then, nickel is reactive enough with oxygen so that native nickel is rarely found on Earth's surface, being mostly confined to the interiors of larger nickel–iron meteorites that were protected from oxidation during their time in space. On Earth, such native nickel is always found in combination with iron, a reflection of those elements' origin as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earth's inner core.^[3]

The use of nickel (as a natural meteoric nickel–iron alloy) has been traced as far back as 3500 BC. Nickel was first isolated and classified as a chemical element in 1751 by Axel Fredrik Cronstedt, who initially mistook its ore for a copper mineral. The element name comes from a mischievous sprite of German miner's mythology, Nickel (similar to Old Nick), that personified the fact that copper-nickel ores resisted refinement into copper. Nickel's most important modern ore minerals are laterites, including limonite, garnierite, and pentlandite. Major production sites include Sudbury region in Canada (which is thought to be of meteoric origin), New Caledonia in the Pacific and Norilsk in Russia.

Because of nickel's slow rate of oxidation at room temperature, it is considered corrosion-resistant. Historically this has led to its use for plating metals such as iron and brass, to its use for chemical apparatus, and its use in certain alloys that will retain a high silvery polish, such as German silver. About 6% of world nickel production is still used for corrosion-resistant pure-nickel plating. Nickel was once a common component of coins, but has largely been replaced by cheaper iron for this purpose, especially since the metal has proven to be a skin allergen for some people.

Nickel is one of the four elements that are ferromagnetic around room temperature. Alnico permanent magnets based partly on nickel are of intermediate strength between iron-based permanent magnets and rare-earth magnets. The metal is chiefly valuable in the modern world for the alloys it forms; about 60% of world production is used in nickel-steels (particularly stainless steel). Other common alloys, as well as some new superalloys, make up most of the remainder of world nickel use, with chemical uses for nickel compounds consuming less than 3% of production.^[4] As a compound, nickel has a number of niche chemical manufacturing uses, such as a catalyst for hydrogenation. Enzymes of some microorganisms and plants contain nickel as an active center, which makes the metal an essential nutrient for them.

Characteristics[link]

Atomic and physical properties[link]

Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. It is one of only four elements that are magnetic at or near room temperature, the others being iron, cobalt and gadolinium. Its Curie temperature is 355 °C, meaning that bulk nickel is non-magnetic above this temperature.^[5] The unit cell of nickel is a face centered cube with the lattice parameter of 0.352 nm giving an atomic radius of 0.124 nm. Nickel belongs to the transition metals and is hard and ductile.

Electron configuration dispute[link]

The nickel atom has two electron configurations, [Ar] 4s² 3d⁸ and [Ar] 4s¹ 3d⁹, which are very close in energy, where the symbol [Ar] refers to the argon-like core structure. There is some disagreement as to which should be considered the lowest energy configuration.^[6] Chemistry textbooks quote the electron configuration of nickel as [Ar] 4s² 3d⁸,^[7] or equivalently as [Ar] 3d⁸ 4s².^[8] This configuration agrees with the Madelung energy ordering rule, which predicts that 4s is filled before 3d. It is supported by the experimental fact that the lowest energy state of the nickel atom is a 4s² 3d⁸ energy level, specifically the 3d⁸(³F) 4s^{2 3}F, J=4 level.^[9]

However each of these two configurations in fact gives rise to a set of states at different energies.^[9] The two sets of energies overlap, and the average energy of states having configuration [Ar] 4s¹ 3d⁹ is in fact lower than the average energy of states having configuration [Ar] 4s² 3d⁸. For this reason the research literature on atomic calculations quotes the ground state configuration of nickel as 4s¹ 3d⁹.^[6]

Isotopes[link]

Naturally occurring nickel is composed of 5 stable isotopes; ⁵⁸Ni, ⁶⁰Ni, ⁶¹Ni, ⁶²Ni and ⁶⁴Ni with ⁵⁸Ni being the most abundant (68.077% natural abundance). ⁶²Ni is the most stable nuclide of all the existing elements, with binding energy greater than both ⁵⁶Fe, often incorrectly cited as most stable, and ⁵⁸Fe.^[10] 18 radioisotopes have been characterised with the most stable being ⁵⁹Ni with a half-life of 76,000 years, ⁶³Ni with a half-life of 100.1 years, and ⁵⁶Ni with a half-life of 6.077 days. All of the remaining radioactive isotopes have half-lives that are less than 60 hours and the majority of these have half-lives that are less than 30 seconds. This element also has one meta state.^[11]

Nickel-56 is produced by the silicon burning process and later set free in large quantities during type Ia supernovae. The shape of the light curve of these supernovae at intermediate to late-times corresponds to the decay via electron capture of nickel-56 to cobalt-56 and ultimately to iron-56.^[12] Nickel-59 is a long-lived cosmogenic radionuclide with a half-life of 76,000 years. ⁵⁹Ni has found many applications in isotope geology. ⁵⁹Ni has been used to date the terrestrial age of meteorites and to determine abundances of extraterrestrial dust in ice and sediment. Nickel-60 is the daughter product of the extinct radionuclide ⁶⁰Fe, which decays with a half-life of 2.6 million years. Because ⁶⁰Fe has such a long half-life, its persistence in materials in the solar system at high enough concentrations may have generated observable variations in the isotopic composition of ⁶⁰Ni. Therefore, the abundance of ⁶⁰Ni present in extraterrestrial material may provide insight into the origin of the solar system and its early history. Nickel-62 has the highest binding energy per nucleon of any isotope for any element (8.7946 Mev/nucleon).^[13] Isotopes heavier than ⁶²Ni cannot be formed by nuclear fusion without losing energy. ⁴⁸Ni, discovered in 1999, is the most proton-rich heavy element isotope known. With 28 protons and 20 neutrons ⁴⁸Ni is "double magic" (like ²⁰⁸Pb) and therefore unusually stable.^[11][14]

The isotopes of nickel range in atomic weight from 48 u (⁴⁸Ni) to 78 u (⁷⁸Ni). Nickel-78's half-life was recently measured to be 110 milliseconds and is believed to be an important isotope involved in supernova nucleosynthesis of elements heavier than iron.^[15]

Occurrence[link]

Widmanstätten pattern showing the two forms of nickel-iron, Kamacite and Taenite, in an octahedrite meteorite

On Earth, nickel occurs most often in combination with sulfur and iron in pentlandite, with sulfur in millerite, with arsenic in the mineral nickeline, and with arsenic and sulfur in nickel galena.^[16] Nickel is commonly found in iron meteorites as the alloys kamacite and taenite.

The bulk of the nickel mined comes from two types of ore deposits. The first are laterites where the principal ore minerals are nickeliferous limonite: (Fe, Ni)O(OH) and garnierite (a hydrous nickel silicate): (Ni, Mg)₃Si₂O₅(OH)₄. The second are magmatic sulfide deposits where the principal ore mineral is pentlandite: (Ni, Fe)₉S₈.

In terms of supply, the Sudbury region of Ontario, Canada, produces about 30% of the world's supply of nickel. The Sudbury Basin deposit is theorized to have been created by a meteorite impact event early in the geologic history of Earth. Russia contains about 40% of the world's known resources at the Norilsk deposit in Siberia. The Russian mining company MMC Norilsk Nickel obtains the nickel and the associated palladium for world distribution. Other major deposits of nickel are found in New Caledonia, France, Australia, Cuba, and Indonesia. Deposits found in tropical areas typically consist of laterites, which are produced by the intense weathering of ultramafic igneous rocks and the resulting secondary concentration of nickel bearing oxide and silicate minerals.

Based on geophysical evidence, most of the nickel on Earth is postulated to be concentrated in the Earth's outer core and inner core. Kamacite and taenite are naturally occurring alloys of iron and nickel. For kamacite the alloy is usually in the proportion of 90:10 to 95:5 although impurities such as cobalt or carbon may be present, while for taenite the nickel content is between 20% and 65%. Kamacite and taenite occur in nickel iron meteorites.^[17]

Compounds[link]

Tetracarbonyl nickel

The most common oxidation state of nickel is +2, but compounds of Ni⁰, Ni⁺, and Ni³⁺ are well known, and Ni⁴⁺ has been demonstrated.^[18]

Nickel(0)[link]

Tetracarbonylnickel (Ni(CO)₄), discovered by Ludwig Mond,^[19] is a volatile liquid at room temperature. On heating, the complex decomposes back to nickel and carbon monoxide:

Ni(CO)₄ aFailed to parse (Missing texvc executable; please see math/README to configure.): \overrightarrow{\leftarrow}

Ni + 4 CO

This behavior is exploited in the Mond process for purifying nickel, as described above. The related nickel(0) complex bis(cyclooctadiene)nickel(0) is a useful catalyst in organonickel chemistry due to the easily displaced cod ligands.

Nickel(II)[link]

Nickel sulfate crystals

Nickel(II) forms compounds with all common anions, i.e. the sulfide, sulfate, carbonate, hydroxide, carboxylates, and halides. Nickel(II) sulfate is produced in large quantities by dissolving nickel metal or oxides in sulfuric acid. It exists as both a hexa- and heptahydrates.^[20] This compound is useful for electroplating nickel.

The four halogens form nickel compounds, all of which adopt octahedral geometries. Nickel(II) chloride is most common, and its behavior is illustrative of the other halides. Nickel(II) chloride is produced by dissolving nickel residues in hydrochloric acid. The dichloride is usually encountered as the green hexahydrate, but it can be dehydrated to give the yellow anhydrous NiCl₂. Some tetracoordinate nickel(II) complexes form both tetrahedral and square planar geometries. The tetrahedral complexes are paramagnetic and the square planar complexes are diamagnetic. This equilibrium as well as the formation of octahedral complexes contrasts with the behavior of the divalent complexes of the heavier group 10 metals, palladium(II) and platinum(II), which tend to adopt only square-planar complexes.^[18]

Nickelocene is known; it has an electron count of 20, making it relatively unstable.

Nickel(III) antimonide

Nickel(I), (III), and (IV)[link]

For simple compounds, nickel(III) and nickel(IV) only occurs with fluoride and oxides. Nickel(III) oxide is used as the cathode in many rechargeable batteries, including nickel-cadmium, nickel-iron, nickel hydrogen, and nickel-metal hydride, and used by certain manufacturers in Li-ion batteries.^[21]

History[link]

Because the ores of nickel are easily mistaken for ores of silver, understanding of this metal and its use dates to relatively recent times. However, the unintentional use of nickel is ancient, and can be traced back as far as 3500 BC. Bronzes from what is now Syria had contained up to 2% nickel.^[22] Further, there are Chinese manuscripts suggesting that "white copper" (cupronickel, known as baitong) was used there between 1700 and 1400 BC. This Paktong white copper was exported to Britain as early as the 17th century, but the nickel content of this alloy was not discovered until 1822.^[23]

In medieval Germany, a red mineral was found in the Erzgebirge (Ore Mountains) that resembled copper ore. However, when miners were unable to extract any copper from it, they blamed a mischievous sprite of German mythology, Nickel (similar to Old Nick), for besetting the copper. They called this ore Kupfernickel from the German Kupfer for copper.^{[24][25][26][27]} This ore is now known to be nickeline or niccolite, a nickel arsenide. In 1751, Baron Axel Fredrik Cronstedt was attempting to extract copper from kupfernickel and obtained instead a white metal that he named after the spirit which had given its name to the mineral, nickel.^[28] In modern German, Kupfernickel or Kupfer-Nickel designates the alloy cupronickel.

After its discovery, the only source for nickel was the rare Kupfernickel, but, from 1824 on, the nickel was obtained as byproduct of cobalt blue production. The first large-scale producer of nickel was Norway, which exploited nickel-rich pyrrhotite from 1848 on. The introduction of nickel in steel production in 1889 increased the demand for nickel, and the nickel deposits of New Caledonia, which were discovered in 1865, provided most of the world's supply between 1875 and 1915. The discovery of the large deposits in the Sudbury Basin, Canada in 1883, in Norilsk-Talnakh, Russia in 1920, and in the Merensky Reef, South Africa in 1924 made large-scale production of nickel possible.^[23]

Dutch coins made of pure nickel

Nickel has been a component of coins since the mid-19th century. In the United States, the term "nickel" or "nick" was originally applied to the copper-nickel Flying Eagle cent, which replaced copper with 12% nickel 1857–58, then the Indian Head cent of the same alloy from 1859–1864. Still later in 1865, the term designated the three-cent nickel, with nickel increased to 25%. In 1866, the five-cent shield nickel (25% nickel, 75% copper) appropriated the designation. Along with the alloy proportion, this term has been used to the present in the United States. Coins of nearly pure nickel were first used in 1881 in Switzerland, and more notably 99.9% nickel five-cent coins were struck in Canada (the world's largest nickel producer at the time) during non-war years from 1922–1981, and their metal content made these coins magnetic.^[29] During the wartime period 1942–45, more or all nickel was removed from Canadian and U.S. coins, due to nickel's war-critical use in armor.^[25][30] Canada switched alloys again to plated steel during the Korean war, but was forced to stop making pure nickel "nickels" in 1981, reserving the pure 99.9% nickel alloy after 1968 only to its higher-value coins. Finally, in the 21st century, with rising nickel prices, most countries that formerly used nickel in their coins have abandoned the metal for cost reasons, and the U.S. five cents remains one of the few coins in which the metal is still used, save for exterior plating.^[31]

Production[link]

World nickel production in metric tons, in 2005. The Russian Federation is the largest producer, followed by Canada.

In 2005, Russia was the largest producer of nickel with about one-fifth world share closely followed by Canada, Australia, and Indonesia, as reported by the British Geological Survey. A nickel deposit in western Turkey had been exploited, with this location being especially convenient for European smelters, steelmakers, and factories. The one locality in the United States where nickel was commercially mined is Riddle, Oregon, where several square miles of nickel-bearing garnierite surface deposits are located. The mine closed in 1987.^[32][33] The Eagle mine project is a proposed new nickel mine in Michigan's upper peninsula.

Extraction and purification[link]

Nickel is recovered through extractive metallurgy. Nickel is extracted from its ores by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on the composition of the impurities.

Most sulfide ores have traditionally been processed using pyrometallurgical techniques to produce a matte for further refining. Recent advances in hydrometallurgy have resulted in significant nickel purification using these processes. Most sulfide deposits have traditionally been processed by concentration through a froth flotation process followed by pyrometallurgical extraction. In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then smelted. After producing the nickel matte, further processing is done via the Sherritt-Gordon process. First, copper is removed by adding hydrogen sulfide, leaving a concentrate of only cobalt and nickel. Then, solvent extraction is used to separate the cobalt and nickel, with the final nickel concentration greater than 99%.

Electrolytically refined nickel nodule, with visible green, crystallized nickel-electrolyte salts in the pores.

Electrorefining[link]

A second common form of further refining involves the leaching of the metal matte into a nickel salt solution, followed by the electro-winning of the nickel from solution by plating it onto a cathode as electrolytic nickel.

Mond process[link]

Highly purified nickel spheres made in the Mond process.

Purification of nickel oxides to obtain the purest metal is performed via the Mond process, which increases the nickel concentrate to greater than 99.99% purity.^[34] This process was patented by L. Mond and has been in industrial use since before the beginning of the 20th century. In the process, nickel is reacted with carbon monoxide at around 40–80 °C to form nickel carbonyl in the presence of a sulfur catalyst. Iron gives iron pentacarbonyl too, but this reaction is slow. If necessary, it may be separated by distillation. Dicobalt octacarbonyl is also formed in this process, but it decomposes to tetracobalt dodecacarbonyl at the reaction temperature to give a non-volatile solid.^[4]

Nickel is re-obtained from the nickel carbonyl by one of two processes. It may be passed through a large chamber at high temperatures in which tens of thousands of nickel spheres, called pellets, are constantly stirred. It then decomposes depositing pure nickel onto the nickel spheres. Alternatively, the nickel carbonyl may be decomposed in a smaller chamber at 230 °C to create fine nickel powder. The resultant carbon monoxide is re-circulated and reused through the process. The highly pure nickel produced by this process is known as "carbonyl nickel".^[35]

Metal value[link]

The market price of nickel surged throughout 2006 and the early months of 2007; as of April 5, 2007, the metal was trading at 52,300 USD/tonne or 1.47 USD/oz.^[36] The price subsequently fell dramatically from these peaks, and as of 19 January 2009 the metal was trading at 10,880 USD/tonne.^[36]

The US nickel coin contains 0.04 oz (1.25 g) of nickel, which at the April 2007 price was worth 6.5 cents, along with 3.75 grams of copper worth about 3 cents, making the metal value over 9 cents. Since the face value of a nickel is 5 cents, this made it an attractive target for melting by people wanting to sell the metals at a profit. However, the United States Mint, in anticipation of this practice, implemented new interim rules on December 14, 2006, subject to public comment for 30 days, which criminalize the melting and export of cents and nickels.^[37] Violators can be punished with a fine of up to $10,000 and/or imprisoned for a maximum of five years.

As of September 16, 2011, the melt value of a U.S. nickel is $0.0600409, which is 20% higher than the face value.^[38]

Applications[link]

Nickel superalloy jet engine (RB199) turbine blade

The fraction of global nickel production presently used for various applications is as follows: 60% for making nickel steels; 14% in nickel-copper alloys and nickel silver; 9% to make malleable nickel, nickel clad, Inconel, and other superalloys; 6% in plating; 3% for nickel cast irons; 3% in heat and electric resistance alloys, such as Nichrome; 2% for nickel brasses and bronzes; 3% in all other applications combined.^[39][40]

Nickel is used in many specific and recognizable industrial and consumer products, including stainless steel, alnico magnets, coinage, rechargeable batteries, electric guitar strings, microphone capsules, and special alloys. It is also used for plating and as a green tint in glass. Nickel is preeminently an alloy metal, and its chief use is in the nickel steels and nickel cast irons, of which there are many varieties. It is also widely used in many other alloys, such as nickel brasses and bronzes, and alloys with copper, chromium, aluminium, lead, cobalt, silver, and gold (Inconel, Incoloy, Monel, Nimonic).^[41]

A "horseshoe magnet" made of alnico nickel alloy. The composition of alnico alloys is typically 8–12% Al, 15–26% Ni, 5–24% Co, up to 6% Cu, up to 1% Ti, and the balance is Fe. The development of alnico began in 1931 when it was discovered that an alloy of iron, nickel, and aluminum had a coercivity double that of the best magnet steels of the time. Alnico magnets are now being replaced by rare earth magnets in many applications

Because of its resistance to corrosion, nickel has been occasionally used historically as a substitute for decorative silver. Nickel was also occasionally used in some countries after 1859 as a cheap coinage metal (see above) but beginning the later years of the 20th century has largely replaced by cheaper stainless steel (i.e., iron) alloys, except notably in the United States.

Nickel is an excellent alloying agent for certain other precious metals, and so used in the so-called fire assay, as a collector of platinum group elements (PGE). As such, nickel is capable of full collection of all 6 PGE elements from ores, in addition to partial collection of gold. High-throughput nickel mines may also engage in PGE recovery (primarily platinum and palladium); examples are Norilsk in Russia and the Sudbury Basin in Canada.

Nickel foam or nickel mesh is used in gas diffusion electrodes for alkaline fuel cells.^[42][43]

Nickel and its alloys are frequently used as catalysts for hydrogenation reactions. Raney nickel, a finely-divided nickel-aluminium alloy, is one common form, however related catalysts are also often used, including related 'Raney-type' catalysts.

Nickel is a naturally magnetostrictive material, meaning that, in the presence of a magnetic field, the material undergoes a small change in length.^[44] In the case of nickel, this change in length is negative (contraction of the material), which is known as negative magnetostriction and is on the order of 50 ppm.

Nickel is used as a binder in the cemented tungsten carbide or hardmetal industry and used in proportions of six to 12% by weight. Nickel can make the tungsten carbide magnetic and adds corrosion-resistant properties to the cemented tungsten carbide parts, although the hardness is lower than those of parts made with cobalt binder.^[45]

Biological role[link]

Although not recognized until the 1970s, nickel plays important roles in the biology of microorganisms and plants.^[46] In fact, urease (an enzyme that assists in the hydrolysis of urea) contains nickel. The NiFe-hydrogenases contain nickel in addition to iron-sulfur clusters. Such [NiFe]-hydrogenases characteristically oxidise H₂. A nickel-tetrapyrrole coenzyme, Cofactor F430, is present in the methyl coenzyme M reductase, which powers methanogenic archaea. One of the carbon monoxide dehydrogenase enzymes consists of an Fe-Ni-S cluster.^[47] Other nickel-containing enzymes include a rare bacterial class of superoxide dismutase^[48] and glyoxalase I enzymes in bacteria and several parasitic eukaryotic trypanosomal parasites ^[49] (this enzyme in higher organisms, including yeast and mammals, uses divalent zinc, Zn²⁺).^{[50][51][52][53][54]}

Toxicity[link]

In the US, the minimal risk level of nickel and its compounds is set to 0.2 µg/m³ for inhalation during 15–364 days.^[55] Nickel sulfide fume and dust are believed to be carcinogenic, and various other nickel compounds may be as well.^[56][57] Nickel carbonyl, [Ni(CO)₄], is an extremely toxic gas. The toxicity of metal carbonyls is a function of both the toxicity of the metal as well as the carbonyl's ability to give off highly toxic carbon monoxide gas, and this one is no exception; nickel carbonyl is also explosive in air.^[58][59] Sensitized individuals may show an allergy to nickel, affecting their skin, also known as dermatitis. Sensitivity to nickel may also be present in patients with pompholyx. Nickel is an important cause of contact allergy, partly due to its use in jewellery intended for pierced ears.^[60] Nickel allergies affecting pierced ears are often marked by itchy, red skin. Many earrings are now made nickel-free due to this problem. The amount of nickel allowed in products that come into contact with human skin is regulated by the European Union. In 2002, researchers found amounts of nickel being emitted by 1 and 2 Euro coins far in excess of those standards. This is believed to be due to a galvanic reaction.^[61]

Nickel was voted Allergen of the Year in 2008 by the American Contact Dermatitis Society.^[62]

Reports also showed that both the nickel-induced activation of hypoxia-inducible factor (HIF-1) and the up-regulation of hypoxia-inducible genes are due to depleted intracellular ascorbate levels. The addition of ascorbate to the culture medium increased the intracellular ascorbate level and reversed both the metal-induced stabilization of HIF-1- and HIF-1α-dependent gene expression.^[63][64]

See also[link]

• Category:Nickel alloys
• Nickel aluminide
• Raney nickel
• Superalloy
• Energy Catalyzer

References[link]

External links[link]

Wikimedia Commons has media related to: Nickel

Look up nickel in Wiktionary, the free dictionary.

• An occupational hygiene assessment of dermal nickel exposures in primary production industries by GW Hughson. Institute of Occupational Medicine Research Report TM/04/05
• An occupational hygiene assessment of dermal nickel exposures in primary production and primary user industries. Phase 2 Report by GW Hughson. Institute of Occupational Medicine Research Report TM/05/06
• Norilsk Nickel, Norilsk, Russia
• Vale Nickel, Sudbury, Ontario, Canada (formerly known as INCO)
• Xstrata Nickel, Sudbury Operations (formerly known as Falconbridge)

vep:Nikel' (himine element)

Tom Waits
Waits during an interview in Buenos Aires, Argentina, April 2007
Background information
Birth name	Thomas Alan Waits
Born	(1949-12-07) December 7, 1949 (age 62) Pomona, California, United States
Genres	Rock, experimental
Occupations	Singer-songwriter, musician, actor, composer
Instruments	Vocals, piano, guitar
Years active	1972–present
Labels	Asylum Records, Island Records, ANTI-
Website	Official website

Thomas Alan "Tom" Waits (born December 7, 1949) is an American singer-songwriter, composer, and actor. Waits has a distinctive voice, described by critic Daniel Durchholz as sounding "like it was soaked in a vat of bourbon, left hanging in the smokehouse for a few months, and then taken outside and run over with a car."^[1] With this trademark growl, his incorporation of pre-rock music styles such as blues, jazz, and vaudeville, and experimental tendencies verging on industrial music,^[2] Waits has built up a distinctive musical persona. He has worked as a composer for movies and musical plays and has acted in supporting roles in films including Paradise Alley and Bram Stoker's Dracula; he also starred in the 1986 film Down by Law. He was nominated for an Academy Award for his soundtrack work on One from the Heart.

Lyrically, Waits' songs frequently present atmospheric portrayals of grotesque, often seedy characters and places—although he has also shown a penchant for more conventional ballads. He has a cult following and has influenced subsequent songwriters despite having little radio or music video support. His songs are best-known through cover versions by more commercial artists: "Jersey Girl", performed by Bruce Springsteen, "Ol' '55", performed by the Eagles, and "Downtown Train", performed by Rod Stewart. Although Waits' albums have met with mixed commercial success in his native United States, they have occasionally achieved gold album sales status in other countries. He has been nominated for a number of major music awards and has won Grammy Awards for two albums, Bone Machine and Mule Variations. In 2011, Waits was inducted into the Rock and Roll Hall of Fame.^[3][4]

Waits lives in Sonoma County, California with his wife, Kathleen Brennan, and three children.

Origins and musical beginnings[link]

Waits was born at Park Avenue Hospital in Pomona, California to Jesse Frank Waits and Alma Johnson McMurray, both schoolteachers.^[5][6] His father was of Scots-Irish descent and his mother was a Norwegian American. After Waits' parents divorced in 1960, he lived with his mother in Whittier, and then moved to National City, in San Diego County, near the Mexico–United States border.^[6] Waits, who taught himself how to play the piano on a neighbor's instrument, often took trips to Mexico with his father, who taught Spanish; he would later say that he found his love of music during these trips through a Mexican ballad that was "probably a Ranchera, you know, on the car radio with my dad."^[7]

By 1965, while attending Hilltop High School within the Sweetwater Union High School District, Chula Vista,^[6] Waits was playing in an R&B/soul band called The Systems and had begun his first job at Napoleone Pizza House in National City (about which he would later sing on "I Can't Wait to Get Off Work (And See My Baby on Montgomery Avenue)" from Small Change and "The Ghosts of Saturday Night (After Hours at Napoleone's Pizza House)" on The Heart of Saturday Night).^[5] He later admitted that he was not a fan of the 1960s music scene, stating, "I wasn't thrilled by Blue Cheer, so I found an alternative, even if it was Bing Crosby."^[8] Five years later, he was working as a doorman at the Heritage nightclub in San Diego—where artists of every genre performed—when he did his first paid gig for $6.^[5] A fan of Bob Dylan, Lord Buckley, Jack Kerouac, Louis Armstrong, Howlin' Wolf, and Charles Bukowski, Waits began developing his own idiosyncratic musical style.

After serving with the United States Coast Guard,^[9] he took his newly formed act to Monday nights at The Troubadour in Los Angeles, where musicians would line up all day for the opportunity to perform on stage that night. In 1971, Waits moved to the Echo Park neighborhood of L.A. (at the time, also home to musicians Glenn Frey of the Eagles, J. D. Souther, Jackson Browne, and Frank Zappa) and signed with Herb Cohen at the age of 21. From August to December 1971, Waits made a series of demo recordings for Cohen's Bizarre/Straight label, including many songs for which he would later become known. These early tracks were released twenty years later on The Early Years, Volume One and Volume Two.

1970s[link]

Waits signed to Asylum Records in 1972,^[10] and after numerous abortive recording sessions, his first record—the jazzy, folk-tinged Closing Time—was released in 1973. The album, which was produced and arranged by former Lovin' Spoonful member Jerry Yester, received positive reviews, but Waits did not gain widespread attention until a number of the album's tracks were covered by more prominent artists. Later in 1973, Tim Buckley released the album Sefronia, which contained a cover version of Waits' song "Martha" from Closing Time, the first-ever cover of a Tom Waits song by a known artist.^[11] This cover later appeared in the 1995 compilation Step Right Up: The Songs of Tom Waits. The album's opening track, "Ol' '55", was recorded by the Eagles in 1974 for their On the Border album.^[11]

He began touring and opening for such artists as Charlie Rich, Martha and the Vandellas, and Frank Zappa. Waits received increasing critical acclaim and gathered a loyal cult following with his subsequent albums. The Heart of Saturday Night (1974), featuring the song "(Looking for) The Heart of Saturday Night", revealed Waits's roots as a nightclub performer, with half-spoken and half-crooned ballads often accompanied by a jazz backup band.^[12] Waits described the album as:

...a comprehensive study of a number of aspects of this search for the center of Saturday night, which Jack Kerouac relentlessly chased from one end of this country to the other, and I've attempted to scoop up a few diamonds of this magic that I see.^[13]

In 1975, Waits moved to the Tropicana Motel on Santa Monica Boulevard^[14] and released the double album Nighthawks at the Diner, recorded in a studio with a small audience in order to capture the ambience of a live show. The record exemplifies this phase of his career, including the lengthy spoken interludes between songs that punctuated his live act. That year, he also contributed backing vocals to Bonnie Raitt's "Your Sweet and Shiny Eyes", from her album Home Plate.

By this time, Waits was drinking heavily, and life on the road was starting to take its toll. Waits, looking back at the period, has said,

I was sick through that whole period [...] It was starting to wear on me, all the touring. I'd been traveling quite a bit, living in hotels, eating bad food, drinking a lot — too much. There's a lifestyle that's there before you arrive and you're introduced to it. It's unavoidable.^[15]

In reaction to these hardships, Waits recorded Small Change (1976), which finds him in a much more cynical and pessimistic mood, lyrically, with many songs such as "The Piano Has Been Drinking (Not Me) (An Evening with Pete King)" and "Bad Liver and a Broken Heart (In Lowell)". With the album, Waits asserted that he "tried to resolve a few things as far as this cocktail lounge, maudlin, crying-in-your-beer image that I have. There ain't nothin' funny about a drunk [...] I was really starting to believe that there was something amusing and wonderfully American about being a drunk. I ended up telling myself to cut that shit out."^[16] The album, which also included long-time fan favorite "Tom Traubert's Blues (Four Sheets to the Wind in Copenhagen)", featured famed drummer Shelly Manne and was, like his previous albums, heavily influenced by jazz.

Small Change, which was accompanied by the double A-side single "Step Right Up"/"The Piano Has Been Drinking", was a critical and commercial success and far outsold any of Waits's previous albums. With it, Waits broke onto Billboard's Top 100 Albums chart for the first time in his career (a feat Waits would not repeat until 1999 with the release of Mule Variations).^[17] This resulted in a much higher public profile, which brought with it interviews and articles in Time, Newsweek, and Vogue. Waits put together a regular touring band, The Nocturnal Emissions, which featured Frank Vicari on tenor saxophone, Fitzgerald Jenkins on bass guitar, and Chip White on drums and vibraphone. Tom Waits and the Nocturnal Emissions toured the United States and Europe extensively from October 1976 until May 1977,^[17] including a performance of "The Piano Has Been Drinking" on cult BBC2 television music show the Old Grey Whistle Test in May 1976.^[18]

Foreign Affairs (1977) was musically in a similar vein to Small Change, but showed further artistic refinement and exploration into jazz and blues styles. Particularly noteworthy is the long cinematic spoken-word piece, "Potter's Field", set to an orchestral score. The album also features Bette Midler singing a duet with Waits on "I Never Talk to Strangers." The album Blue Valentine (1978) displayed Waits's biggest musical departure to date, with much more focus on electric guitar and keyboards than on previous albums and hardly any strings (with the exception of album-opener "Somewhere" — a cover of Leonard Bernstein's song from West Side Story — and "Kentucky Avenue") for a darker, more blues-oriented sound. The song "Blue Valentines" was also unique for Waits in that it featured a desolate arrangement of solo electric guitar played by Ray Crawford, accompanied by Waits' vocal. Around this time, Waits had a relationship with Rickie Lee Jones^{[citation needed]} (who appears on the sleeve art of the Blue Valentine album). In 1978, Waits also appeared in his first film role, in Paradise Alley as Mumbles the pianist, and contributed the original compositions "(Meet Me in) Paradise Alley" and "Annie's Back in Town" to the film's soundtrack.^[19]

Heartattack and Vine, Waits's last studio album for Asylum, was released in 1980, featuring a developing sound that included both ballads ("Jersey Girl") and rougher-edged rhythm and blues. The same year, he began a long working relationship with Francis Ford Coppola, who asked Waits to provide music for his film One from the Heart. For Coppola's film, Waits originally wanted to work with Bette Midler; she was unavailable due to prior engagements, however. Waits ended up working with singer/songwriter Crystal Gayle as his vocal foil for the album.

1980s[link]

In August 1980, Waits married Kathleen Brennan, a screenwriter, whom he had met while working on the set of the Francis Ford Coppola movie One from the Heart. Brennan is regularly credited as co-author of many songs in his later albums, and Waits often cites her as a major influence on his work. She introduced him to the music of Captain Beefheart. Despite having shared a manager with Beefheart in the 1970s, Waits says, "I became more acquainted with him when I got married."^[20] Waits would later describe his relationship with Brennan as a paradigm shift in his musical development. After leaving Asylum, the label released the first Tom Waits "Best of" album in 1981, a collection called Bounced Checks, notable for including an alternate, stripped down version of "Jersey Girl" and the otherwise unreleased "Mr. Henry", as well as an alternate master of "Whistlin' Past the Graveyard" and a live performance of "The Piano Has Been Drinking". During this period, Waits appeared in a series of minor movie roles, including a cameo role in Wolfen (1981) as an inebriated piano player, and his song "Jitterbug Boy" also appeared on the movie's soundtrack. One from the Heart received its official theatrical release in 1982, with Waits appearing in a cameo as a trumpet player as well as receiving an Oscar nomination for Original Song Score (eventually losing out to Victor Victoria, by Henry Mancini and Leslie Bricusse). This marked the first in a series of collaborations between Waits and Coppola, with Waits appearing in cameos in Coppola's movies The Outsiders (1983), Rumble Fish (1983), and The Cotton Club (1984), and a major role in Bram Stoker's Dracula. Waits also contributed two songs to the documentary Streetwise (1984), "Rat's Theme" and "Take Care of All My Children".

After leaving Asylum for Island Records, Waits released Swordfishtrombones in 1983, a record that marked a sharp turn in his musical direction. While Waits had before played either piano or guitar, he now gravitated towards less common instruments, saying, "Your hands are like dogs, going to the same places they've been. You have to be careful when playing is no longer in the mind but in the fingers, going to happy places. You have to break them of their habits or you don't explore; you only play what is confident and pleasing. I'm learning to break those habits by playing instruments I know absolutely nothing about, like a bassoon or a waterphone."^[21] Swordfishtrombones also introduced instruments such as bagpipes ("Town with No Cheer") and marimba ("Shore Leave") to Waits' repertoire, as well as pump organs, percussion (sometimes reminiscent of the music of Harry Partch), horn sections (often featuring Ralph Carney playing in the style of brass bands or soul music), experimental guitar, and obsolete instruments (many of Waits' albums have featured a damaged, unpredictable Chamberlin, and more recent albums have included the little-used Stroh violin).

His songwriting shifted as well, moving away from the traditional piano-and-strings ballad sound of his 1970s output towards a number of styles largely ignored in pop music, including primal blues, cabaret stylings, rumbas, theatrical approaches in the style of Kurt Weill, tango music, early country music and European folk music as well as the Tin Pan Alley-era songs that influenced his early output. He also recorded a spoken word piece, "Frank's Wild Years", influenced by Ken Nordine's "word jazz" records of the 1950s. Apart from Captain Beefheart and some of Dr. John's early output, there was little precedent in popular music.

Waits's new emphasis on experimenting with various styles and instrumentation continued on 1985's Rain Dogs, a sprawling, 19-song collection which received glowing reviews (the album was ranked #21 on Rolling Stone's list of the 100 greatest albums of the 1980s. In 2003, the album was ranked number 397 on Rolling Stone magazine's list of the 500 greatest albums of all time.) Contributions from guitarists Marc Ribot, Robert Quine, and Keith Richards accompanied Waits' move away from piano-based songs, in juxtaposition with an increased emphasis on instruments such as marimba, accordion, double bass, trombone, and banjo. The album also spawned the 12" single "Downtown Train/Tango Till They're Sore/Jockey Full of Bourbon", with Jean Baptiste Mondino filming a promotional music video for "Downtown Train" (which would later become a hit for Rod Stewart), featuring a cameo from boxing legend Jake LaMotta. The album peaked at #188 on Billboard's Top 200 albums chart; however, its reputation has come to far outshine low initial sales.

Franks Wild Years, a musical play by Waits and Brennan, was staged as an Off-Broadway musical in 1986, directed by Gary Sinise,^[22] in a successful run at Chicago's famed Steppenwolf Theater. Waits himself played the lead role. Waits developed his acting career with several supporting roles and a lead role in Jim Jarmusch's Down by Law in 1986, which also featured two of Waits's songs from Rain Dogs in the soundtrack. In the same year, Waits also contributed vocals to the song "Harlem Shuffle" on The Rolling Stones' album Dirty Work.^[23]

In 1987, he released Franks Wild Years (subtitled "Un Operachi Romantico in Two Acts"), which included studio versions from Waits' play of the same name. Rolling Stone summed up the album's myriad styles this way: "Everything from sleazy strip-show blues to cheesy waltzes to supercilious lounge lizardry is given spare, jarring arrangements using various combinations of squawking horns, bashed drums, plucked banjo, snaky double bass, carnival organ and jaunty accordion."^[24] Waits also continued to further his acting career with a supporting role as Rudy the Kraut in Ironweed (an adaptation of William Kennedy's Pulitzer Prize-winning novel) alongside Jack Nicholson and Meryl Streep, in which Waits performed the song "Big Rock Candy Mountain", as well as a part in Robert Frank's Candy Mountain, in which Waits also performed "Once More Before I Go." In 1988, Waits performed in Big Time, a surreal concert movie and soundtrack which he cowrote with his wife.

In 1989, Waits appeared in his final theatrical stage role to date, appearing as Curly in Thomas Babe's Demon Wine, alongside Bill Pullman, Philip Baker Hall, Carol Kane, and Bud Cort. The play opened at the Los Angeles Theater Center in February 1989 to mixed reviews, although Waits' performance was singled out by a number of critics, including John C. Mahoney, who described it as "mesmerizing."^[25] Waits finished the decade with appearances in three movies: as the voice of a radio DJ in Jim Jarmusch's Mystery Train; as Kenny the Hitman in Robert Dornhelm's Cold Feet; and the lead role of Punch & Judy man Silva in Bearskin: An Urban Fairytale. His only musical output of the year consisted of contributing his cover of Phil Phillips' "Sea of Love" to the soundtrack of the Al Pacino movie of the same name^[26] and contributing vocals to The Replacements song "Date to Church", which appeared as a B-side to their single "I'll Be You".

1990s[link]

The Black Rider: The Casting of the Magic Bullets—a theatrical collaboration of Waits, director Robert Wilson, and writer William S. Burroughs—premiered at Hamburg's Thalia Theatre on March 31, 1990. The project was based on a German folktale called Der Freischütz, with Wilson responsible for the design and direction, Burroughs for writing the book, and Waits for music and lyrics, which were heavily influenced by the works of Bertolt Brecht and Kurt Weill.^[27] In the same year, Waits contributed a cover of Cole Porter's "It's All Right with Me" to Red Hot + Blue, the first in the series of compilation albums from the Red Hot Organization — one of the first major AIDS benefits in the music business—which sold over a million copies worldwide. Jim Jarmusch directed a promotional music video for the song.^[28] Waits also collaborated with photographer Sylvia Plachy in the same year; her book Sylvia Plachy's Unguided Tour includes a short Waits record to accompany the photographs and text.

The following year, Waits was extremely busy working on movie soundtracks, acting, and contributing to a number of music projects by other artists. First, Waits appeared on the Primus album Sailing the Seas of Cheese as the voice of "Tommy the Cat", which exposed him to a new audience in alternative rock. This was the first of several collaborations between Waits and the group; Frontman Les Claypool would appear on several subsequent Waits releases. The same year saw Waits provide spoken word contributions to Devout Catalyst, an album by one of Waits' greatest influences, Ken Nordine, on the songs "A Thousand Bing Bangs" and "The Movie." Waits also contributed vocals to a duet with singer Bob Forrest on the song "Adios Lounge" on the Thelonious Monster album Beautiful Mess. He also contributed vocals to two songs ("Little Man" and "I'm Not Your Fool Anymore") on jazz tenor saxophonist Teddy Edwards' album Mississippi Lad. Edwards was extremely complimentary of Waits' contributions, saying:

Tom Waits is the one who got me my contract [sic] with PolyGram. He's wonderful, he's America's best lyricist since Johnny Mercer. He came down to the studio on the Mississippi Lad album, that's the first one I did for PolyGram, and he sang two of my songs, wouldn't accept any money, just trying to give me the best boost that he could.^[29]

The only collection of exclusively Waits-performed material of 1991 appeared when Waits composed and conducted the almost exclusively instrumental music for Jim Jarmusch's 1991 film Night on Earth, which was released as an album the following year. In July 1991, Screamin' Jay Hawkins released the album Black Music for White People, which features covers of two Waits compositions: "Heartattack & Vine" (which later that year was used in a European Levi's advertisement without Waits' permission, resulting in a lawsuit) and "Ice Cream Man". Waits continued to appear in movie acting roles, the most significant of which was his uncredited cameo as a disabled veteran in Terry Gilliam's The Fisher King. He also appeared alongside Kevin Bacon, John Malkovich, and Jamie Lee Curtis in Steve Rash's Queens Logic, and opposite Tom Berenger and Kathy Bates in Hector Babenco's film At Play in the Fields of the Lord, adapted from Peter Matthiessen's 1965 novel.

Bone Machine, Waits's first studio album in five years, was released in 1992. The stark record featured a great deal of percussion and guitar (with little piano or sax), marking another change in Waits' sound. Critic Steve Huey calls it "perhaps Tom Waits's most cohesive album... a morbid, sinister nightmare, one that applied the quirks of his experimental '80s classics to stunningly evocative—and often harrowing—effect... Waits' most affecting and powerful recording, even if it isn't his most accessible."^[30] Bone Machine was awarded a Grammy in the Best Alternative Album category. On December 19, 1992 Alice, Waits's second theatrical project with Robert Wilson, premiered at the Thalia Theatre in Hamburg. Paul Schmidt adapted the text from the works of Lewis Carroll (Alice's Adventures in Wonderland and Through the Looking-Glass, in particular), with songs by Waits and Kathleen Brennan presented as intersections with the text rather than as expansions of the story, as would be the case in conventional musical theater. These songs would be recorded by Waits as a studio album 10 years later on Alice.^[31] 1992 also saw Waits featuring in Francis Ford Coppola's film Bram Stoker's Dracula, as the possessed lunatic Renfield.

In 1993, he released The Black Rider, which contained studio versions of the songs that Waits had written for the musical of the same name three years previously, with the exceptions of "Chase the Clouds Away" and "In the Morning", which appeared in the theatrical production but not on the studio album. William S. Burroughs also guests on vocals on "'Tain't No Sin". In the same year, Waits lent his vocals to Gavin Bryars' 75-minute reworking of his 1971 classical music piece Jesus' Blood Never Failed Me Yet; appeared in Robert Altman's film version of Raymond Carver's stories Short Cuts and Jim Jarmusch's Coffee and Cigarettes: Somewhere in California, a short black-and-white movie with Iggy Pop; and his third child, Sullivan, was born. In 1997, Waits and Brennan wrote and performed the music for Bunny the animated short film by 20th Century Fox's Blue Sky Studios, which was awarded Best Animated Short Film by the Academy of Motion Picture Arts and Sciences.

In 1995, Holly Cole released Temptation, a tribute album consisting entirely of Waits covers.

Another Waits cover was released in 1996, as Meat Loaf covered Martha for his concept album Welcome to the Neighborhood.

In 1998, after Island Records released the compilation Beautiful Maladies: The Island Years, Waits left the label for Epitaph, whose president, Andy Kaulkin, said the label was "...blown away that Tom would even consider us. We are huge fans."^[32] Waits himself was full of praise for the label, saying "Epitaph is rare for being owned and operated by musicians. They have good taste and a load of enthusiasm, plus they're nice people. And they gave me a brand-new Cadillac, of course."^[32]