Tungsten(IV) sulfide

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Tungsten(IV) sulfide
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
1
1
0
 
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

[edit] External links

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