From Wikipedia, the free encyclopedia
Tungsten trisulfide
Names
Other names
Tungsten(VI) sulphide, tris(sulfanylidene)tungsten
Identifiers
ChemSpider
EC Number
InChI=1S/3S.W
Key: YMZATHYBBBKECM-UHFFFAOYSA-N
Properties
WS3
Molar mass
280.038 g/mol
Appearance
Brown solid
Related compounds
Related compounds
Tungsten disulfide
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Tungsten trisulfide is an
inorganic compound of
tungsten and
sulfur with the chemical formula WS3 .
[1]
[2] The compound looks like chocolate-brown powder.
[3]
[4]
Synthesis
Bubbling
hydrogen sulfide through hot acidified solution of tungstenates.
[5]
Reaction of
tungsten disulfide and elemental sulfur on heating:
[6]
WS
2
+
S
⟶
WS
3
{\displaystyle {\ce {WS2 + S -> WS3}}}
Precipitates upon acidification of
thiotungstate solutions:
[5]
(
NH
4
)
2
WS
4
+
HCl
⟶
WS
3
+
2
NH
4
Cl
+
H
2
S
{\displaystyle {\ce {(NH4)2WS4 + HCl -> WS3 + 2NH4Cl + H2S}}}
Na
2
WS
4
+
H
2
SO
4
⟶
WS
3
+
Na
2
SO
4
+
H
2
S
{\displaystyle {\ce {Na2WS4 + H2SO4 -> WS3 + Na2SO4 + H2S}}}
Physical properties
Slightly soluble in cold water and forms colloidal solution in hot water.
Soluble in alkali metal carbonates and alkali metal hydroxides.
[3]
Chemical properties
Tungsten trisulfide can be decomposed by heating into tungsten disulfide and elemental sulfur:
WS
3
⟶
WS
2
+
S
{\displaystyle {\ce {WS3 -> WS2 + S}}}
Reacts with sulfide solutions:
WS
3
+
(
NH
4
)
2
S
⟶
(
NH
4
)
2
WS
4
{\displaystyle {\ce {WS3 + (NH4)2S -> (NH4)2WS4}}}
Reduced by hydrogen:
WS
3
+
3
H
2
⟶
W
+
3
H
2
S
{\displaystyle {\ce {WS3 + 3H2 -> W + 3H2S}}}
References
^ Scott, Robert A.; Jacobson, Allan J.; Chianelli, Russ R.; Pan, W. H.; Stiefel, Edward I.; Hodgson, Keith O.; Cramer, Stephen P. (1 April 1986).
"Reactions of molybdenum trisulfide, tungsten trisulfide, tungsten triselenide, and niobium triselenide with lithium. Metal cluster rearrangement revealed by EXAFS" .
Inorganic Chemistry . 25 (9): 1461–1466.
doi :
10.1021/ic00229a032 .
ISSN
0020-1669 . Retrieved 1 November 2021 .
^ Hille, Russ; Schulzke, Carola; Kirk, Martin L. (29 September 2016).
Molybdenum and Tungsten Enzymes: Bioinorganic Chemistry .
Royal Society of Chemistry . p. 155.
ISBN
978-1-78262-877-4 . Retrieved 1 November 2021 .
^
a
b
Kirk-Othmer Concise Encyclopedia of Chemical Technology, 2 Volume Set .
John Wiley & Sons . 16 July 2007. p. 1122.
ISBN
978-0-470-04748-4 . Retrieved 1 November 2021 .
^
"Tungsten trisulfide" .
National Institute of Standards and Technology . Retrieved 1 November 2021 .
^
a
b Zelikman, A. N.; Krein, O. E.; Samsonov, G. V. (1966) [1964]. Belyaevskaya, L. V. (ed.).
Metallurgiya redkikh metallov [Metallurgy of Rare Metals ]. Israel Program for Scientific Translations. Translated by Aladjem, A. (2nd ed.). Jerusalem: S. Monson / Wiener Bindery. p. 7. Retrieved 1 November 2021 – via
Google Books .
^
"Tungsten Trisulfide-- Tungsten Trisulfide Professional Manufacturer and Supplier" . tungsten-powder.com. Retrieved 1 November 2021 .
Tungsten(0) Tungsten(II) Tungsten(III) Tungsten(IV) Tungsten(V) Tungsten(VI)