Germanium disulfide

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Germanium disulfide

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Template:Longitem	Template:Chembox Elements/molecular formula
Molar mass	Template:Chem molar mass
Appearance	White, translucent crystals
Density	2.94 g cm−3
Melting point	Template:Chembox CalcTemperatures
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Solubility	soluble in liquid ammonia
Template:Longitem	−53.3·10−6 cm3/mol
Template:Longitem	monoclinic, mP36
Template:Longitem	Pc, No. 7
Template:Longitem	tetrahedral at Ge, bent at S
Template:Longitem	50 J /(mol K)
Template:Longitem	−150.06 kJ/mol
Template:Longitem	Carbon disulfide Germanium dioxide Germanium diselenide Germanium monosulfide Lead disulfide Silicon sulfide Tin disulfide

Germanium disulfide or Germanium(IV) sulfide is the inorganic compound with the formula GeS₂. It is a white high-melting crystalline solid. The compound is a 3-dimensional polymer, in contrast to silicon disulfide, which is a one-dimensional polymer. The Ge-S distance is 2.19 Å.

Isolation, production, reactions

Germanium disulfide was first found in samples of argyrodite. The fact that germanium sulfide does not dissolve in aqueous acid facilitated its isolation.

Germanium disulfide is produced by treating a solution of germanium tetrachloride in a concentrated hydrochloric acid solution with hydrogen sulfide. It precipitates as a white solid.

It is insoluble in water, it dissolves in aqueous solutions of sodium sulfide owing to the formation of thiogermanates:

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Natural occurrence

Natural GeS₂ is restricted to fumaroles of some burning coal-mining waste heaps.

References

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