Tungsten (IV) Selenide is an inorganic compound with the molecular formula WSe2 (H2Se2W). Tungsten diselenide is a gray solid with a hexagonal structure similar to molybdenum disulfide. Each tungsten atom is covalent with six selenium The bond is bonded in the coordination mode of a prism, and each selenium is bonded with three tungsten in a pyramidal configuration. The density of tungsten diselenide is 9.32. The bond length between tungsten and selenium is 2.526 Å, and the bond length between selenium and selenium is 3.34 Å. The layers are combined by van der Waals force, and tungsten diselenide is a very stable semiconductor among group VI metal dichalcogenides. The CAS number of tungsten diselenide is 12067-46-8,
EINECS 235-078-7.
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