Halide

A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. Many salts are halides. All Group 1 metals form halides which are white solids at room temperature.

A halide ion is a halogen atom bearing a negative charge. The halide anions are fluoride (F⁻), chloride (Cl⁻), bromide (Br⁻), iodide (I⁻) and astatide (At⁻). Such ions are present in all ionic halide salts.

See chloride, bromide, fluoride, and iodide

Halide compounds such as KCl, KBr and KI can be tested with silver nitrate solution, AgNO₃. The halogen will react with Ag⁺ and form a precipitate, with varying colour depending on the halogen:

For organic compounds containing halides, the Beilstein test is used.

Metal halides are used in high-intensity discharge lamps called metal halide lamps, such as those used in modern street lights. These are more energy-efficient than mercury-vapor lamps, and have much better colour rendition than orange high-pressure sodium lamps. Metal halide lamps are also commonly used in greenhouses or in rainy climates to supplement natural sunlight.

Why isn't the killing of 1.5 million Armenians officially called a 'genocide'?

Edit The Independent 25 Apr 2016

Why are we talking about this now? ... Among them was George Clooney, who called on the world to recognise the mass killings as genocide during a humanitarian prize ceremony in the country ... Read more ....

photo: AP / Pablo Martinez Monsivais

Former Secretary of State Hillary Rodham Clinton speaks at an event hosted by the Center for American Progress (CAP) and the America Federation of State, County and Municipal Employees (AFSCME), Monday, March 23, 2015, in Washington.

Koch: Clinton May Be Better Candidate Than Current GOP

Edit WorldNews.com 25 Apr 2016

Bush."It's possible," Koch said.ABC’s Jonathan Karl followed up asking, “You couldn't see yourself supporting Hillary Clinton, could you?". "We would have to believe her actions would be quite different than her rhetoric. Let me put it that way ... "More of these personal attacks and pitting one person against the other, that's the message you're sending the country,” CBS News reported....

photo: AP / Amr Nabil, File

In this April 11, 2007 file photo, Egyptian cleric Osama Hassan Mustafa Nasr, also known as Abu Omar, who was allegedly kidnapped by CIA agents off the streets of an Italiancity and taken to Egypt where he said he was tortured, talks on his mobile phone as he walks in a Cairo street after attending an Amnesty International press conference in Cairo, Egypt. On Tuesday, Feb. 23, 2016, the European Court of Human Rights ruled Italy abused state secrecy to provide impunity in the 2003 abduction of the Egyptian cleric, who was spirited out of Italy for interrogation and torture in his homeland under the CIA’s extraordinary rendition program. (AP Photo/Amr Nabil, File)

Former CIA Operative Faces Extradition To Italy For 2003 Extraordinary Rendition

Edit WorldNews.com 25 Apr 2016

A former undercover CIA officer will be extradited to Italy to face charges over the 2003 extraordinary rendition of a terror suspect to Egypt, according to Raw Story quoting a UK Guardian story.Sabrina De Sousa, who holds US and Portuguese citizenship, was arrested in Portugal last October and has lost three appeals against being handed over to Italian authorities, the report said. Her extradition is scheduled for May 4....

photo: NASA / JPL/Space Science Institute

File - Ring shadows line the face of distant Saturn, providing a backdrop for the brilliant, white sphere of Enceladus.

Scientists To Look For Aliens On Jupiter And Saturn's Icy Moons

Edit NDTV 25 Apr 2016

In one of its most ambitious projects in deep space, a team of NASA researchers are proposing to send robots at the centre of icy moons to explore the subsurface ocean for presence of life. ....

photo: WN / Bhaskar Mallick

A gay rights activist gestures during a Rainbow Pride rally in Kolkata on July 15, 2012. More than 500 people from the lesbian, gay, bisexual and transgender communities and supporters participated in the annual event to show solidarity and to create awareness about their basic rights

Gay Rights Activist Hacked To Death In Bangladesh

Edit WorldNews.com 26 Apr 2016

“We abhor this senseless act of violence and urge the Government of Bangladesh in the strongest terms to apprehend the criminals behind these murders.” ... WN.com, Jim Berrie....

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Mahama may lose in Northern Region- NDC executive

Edit Modern Ghana 25 Apr 2016

By Myjoyonline.com.Nathan Gadugah ... Rauf Abubakar however told Joy News' Elton John Brobbey the party could suffer defeat in the Northern region if their concerns are not addressed ... But the Regional Secretary of the NDC, Halid Abdul Rauf in a reaction told Joy News his compatriot is "oblivious of what is on the ground." ... Halid Abdul Rauf also queried his colleague for not using internal channels to address his grievances. ....

Mariners to have 1st major league stadium with LED lights

Edit Boston Herald 24 Apr 2016

The replacement of the previous metal halide fixtures was completed this month and the new stadium lighting will be ......

‘Necklace’ of Environmentally Friendly Lights Coming Soon to Bronx-Whitestone Bridge (MTA - Metropolitan Transportation Authority)

Edit Public Technologies 22 Apr 2016

(Source. MTA - Metropolitan Transportation Authority) ... Final programing for the controls of the recently installed LED lights is underway, but the view will be worth it when the lights go on permanently (see photo of recent test run) ... The new fixtures will use approximately 30 watts of power compared to the original 100-watt metal halide fixtures, and are expected to yield about 38,812 kilowatt hour savings annually ... F ... Carey Tunnels....

LED Lighting Project Will Reduce Energy Use, Power Costs, Number of Maintenance Closures (MTA - Metropolitan Transportation Authority)

Edit Public Technologies 22 Apr 2016

Can you grow pot with LED lights?

Edit Grist 21 Apr 2016

Q. Dear Umbra,. Can marijuana be grown as effectively under LED lighting and proper climate control rather than energy-sucking heat lamps?. Cory W. Ann Arbor, Mich. A. Dearest Cory,. Heavens, it’s a big week for pot questions ... Thanks for keeping the theme alive ... Typically, growing operations use glaringly bright high-pressure sodium, or HPS, lights (metal halide and fluorescents are sometimes involved, too) ... The guy knows grow bulbs....

Qualite Sports Lighting News (City of Hillsdale, MI)

Edit Public Technologies 20 Apr 2016

(Source. City of Hillsdale, MI). By K. Price - Wednesday, April 20, 2016. Qualite Sports Lighting in Hillsdale's Industrial & Technology Park introduces new product! ... Q-LED GameChanger™ features a new linear design producing up to 75% energy savings over the existing standard metal halide technology ... Original Document....

AT&T; Center gets $312,000 rebate after switching to LED lights

Edit Business Journal 19 Apr 2016

The San Antonio Spurs will look a little sharper during the playoffs after the AT&T; Center switched over to LED lights, a change that earned the arena a $312,000 rebate ... Although the full cost of the energy-efficiency project was not disclosed, the arena reported switching out 500 metal halide lights with light-emitting diodes as part of Bexar County's $110 million upgrade to… ... ....

New LED Wall Pack from TCP to Provide Up to Eighty Percent Energy Savings (TCP International Holdings Ltd)

Edit Public Technologies 07 Apr 2016

TCP's new LED Wall Packs to provide significant energy savings over Metal Halide ... 'With more customers demanding a simple LED solution that easily replaces Metal Halide luminaires for commercial outdoor applications, we created a product to fill that gap,' said Paul Phillips, Senior Director of Product Management for TCP....

CUNY Awards Science and Engineering Scholarships To 20 NYC High School Students (CUNY - The City University of New York)

Edit Public Technologies 07 Apr 2016

(Source. CUNY - The City University of New York). Twenty New York City high school students - representing bright and promising future scientists and engineers - have been awarded prestigious scholarships to The City University of New York ... The scholarships are offered by The City College of New York, Hunter College and Queens College ... SCHOLARSHIP WINNERS ... Two Phase Catalytic Cyanation Reaction of Aryl Halides in an Ionic Liquid Solution....

ORNL tracks how halogen atoms compete to grow ‘winning’ perovskites (Oak Ridge National Laboratory)

Edit Public Technologies 06 Apr 2016

'Organometallic halide perovskite semiconductors have high carrying capacity and efficiency to rival silicon-based solar cells ... 'To take that first step and maximize solar cell technology made with organometallic halide perovskites, we need to know how to grow high quality light-absorbing material and establish optimal film growth processes,' said Yang, the study's lead author....

Analogue vs digital photography – which is better?

Edit Sydney Morning Herald 06 Apr 2016

Last week a chap, with decades of experience as a professional photographer and once the owner of a photo finishing business, announced that he had sold all his digital cameras and associated gear and reverted to analogue. Looking at his beautiful, luminous prints it is easy to see his point ... Silver halide photography is expensive, which makes the photographer more careful in framing, composing, focussing and exposing ... Advertisement ... ....

Big Savings Via Family Planning, Zooming Emissions, and More!

Edit Huffington Post 06 Apr 2016

Today, the Earth got a little hotter, and a little more crowded. Forests. the cheapest way to store carbon. Fascinating Ants. Another Reason to Preserve Forests, as these Indonesian weaver ants demonstrate. Credit Eko Adiyanto. When we harm forests, we harm ourselves ... Source www.bailiffafrica.org. OO China's Is Regrowing Its Forests -- ... *. * ... ECONOMY, CLIMATE, FUTURE ... Hybrid lead halide perovskite cells were already known to do this efficiently....

HID Lamp Indexes Close out 2015 Down From 2014 (NEMA - National Electrical Manufacturers Association)

Edit Public Technologies 05 Apr 2016

(Source ... Shipments of metal halide lamps decreased by 11.6 percent year-over-year. Sodium vapor lamps accounted for 31.7 percent of high intensity discharge lamp sales in 2015Q4, while mercury vapor and metal halide lamps accounted for 3.4 percent and 64.9 percent of sales, respectively....

'Halide' is featured as a movie character in the following productions:

Hanimin çiftligi (2009)