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Nitrogen triiodide is an inorganic compound with the formula N I 3. It is an extremely sensitive contact explosive : small quantities explode with a loud, sharp snap when touched even lightly, releasing a purple cloud of iodine vapor; it can even be detonated by alpha radiation .
Nitrogen triiodide atomic shape. The structures and bonds that make up a contact explosive contribute to its instability. Covalent compounds that have a large unequal sharing of electrons have the capability to fall apart very easily and explosively. Nitrogen triiodide is a perfect example of this property.
Other chemical compounds with "triiodide" in their name may contain three iodide centers that are not bonded to each other as the triiodide ion, but exist instead as separate iodine atoms or iodide ions. Examples include nitrogen triiodide (NI 3) and phosphorus triiodide (PI 3), where individual iodine atoms are covalently bonded to a central atom.
Nitrogen triiodide is so sensitive that it can be reliably detonated by exposure to alpha radiation. [ 22 ] [ 23 ] Primary explosives are often used in detonators or to trigger larger charges of less sensitive secondary explosives .
This instability makes many such compounds liable to explosive decomposition, releasing nitrogen gas. This tetrazole explosive has a decomposition temperature of 124 °C. It is very sensitive, with an impact sensitivity lower than 0.25 joules. It is, however, less sensitive than nitrogen triiodide.
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Detonating 15 g of Nitrogen triiodide - This compound is created by mixing iodine with concentrated ammonia, it is a contact explosive which can be set off with the smallest shock. It is also the only reaction that we know of which can be set off by alpha radiation. Date: 30 April 2013: Source: 15g of Nitrogen Tri-Iodide: Author: Michael Bell
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