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Identifiers | |
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3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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Properties | |
I2W | |
Molar mass | 437.65 g·mol−1 |
Appearance | dark brown solid [1] |
Density | 6.79 g·cm−3 [2] |
Melting point | 800 °C (decomposes) [2] |
insoluble [2] | |
Related compounds | |
Other
anions
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tungsten(II) chloride tungsten(II) bromide |
Other
cations
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chromium(II) iodide molybdenum(II) iodide |
Related compounds
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tungsten(III) iodide |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Tungsten(II) iodide is an iodide of tungsten, with the chemical formula [W6I8]I4, or abbreviated as WI2.
Tungsten diiodide can obtained from the decomposition from tungsten(III) iodide: [1]
It can also be formed by the displacement reaction of tungsten(II) chloride and iodine: [1]
It can also be formed by the direct reaction of tungsten and iodine, which is a reversible reaction. This reaction can be used in halogen lamps. [3]
Tungsten(II) iodide can also be obtained by reacting tungsten hexacarbonyl with iodine. [4]
Tungsten(II) iodide is a dark brown-colored solid that is stable in air and moisture. Its structure is the same as tungsten(II) chloride, crystallising orthorhombic crystal system, with space group Bbem (No. 64), and lattice parameters a = 1258 pm, b = 1259 pm, c = 1584 pm. [1]