Tungsten(IV) sulfide
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Tungsten(IV) sulfide | |
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Image:Tunsgten(IV) sulfide.jpg | |
Other names | tungsten disulfide tungstite |
Identifiers | |
CAS number | [12138-09-9] |
Properties | |
Molecular formula | S2W |
Molar mass | 247.98 g/mol |
Appearance | blue-grey powder |
Density | 7.500 g/cm3, solid |
Melting point |
1250 °C (decomposes) |
Boiling point |
decomp. |
Hazards | |
EU classification | not listed |
NFPA 704 | |
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
Tungsten(IV) sulfide is the chemical compound with the formula WS2. It occurs naturally as the mineral called tungstenite. This material is a component of certain catalysts used for hydrodesulfurization and hydrodenitrification.
WS2 adopts a layered structure related to MoS2, with W atoms situated in trigonal prismatic coordination sphere.
Contents |
[edit] Uses
[edit] Dry lubricant
It is also used as a lubricant in conjunction with other similar sulfides, e.g MoS2.
[edit] References
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