Germanium disulfide

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Germanium disulfide
Ball and stick model of crystaline germanium sulfide.
Identifiers
CAS number 12025-34-2 YesY
PubChem 82816
ChemSpider 74732 YesY
EC number 234-705-1
Jmol-3D images Image 1
Properties
Molecular formula GeS2
Molar mass 136.77 g mol−1
Appearance White, translucent crystals
Density 2.94 g cm-3
Melting point 840 °C (1,540 °F; 1,110 K)
Boiling point 1,530 °C (2,790 °F; 1,800 K)
Solubility in water 0.45 g/100 mL
Solubility soluble in liquid ammonia
Structure
Crystal structure monoclinic, mP36
Space group Pc, No. 7
Coordination
geometry
tetrahedral at Ge, bent at S
Thermochemistry
Specific
heat capacity
C
50 J /(mol K)
Std enthalpy of
formation
ΔfHo298
-150.06 kJ/mol
Related compounds
Related compounds Carbon disulfide

Germanium dioxide
Germanium diselenide
Germanium monosulfide
Lead disulfide
Silicon sulfide
Tin disulfide

Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Germanium disulfide or Germanium(IV) sulfide is the inorganic compound with the formula GeS2. It is a white high-melting crystalline solid.[1][2] 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.[3]

History[edit]

Germanium disulfide was the first germanium compound found by Clemens Winkler, during the analysis of argyrodite. The fact that germanium sulfide does not dissolve in aqueous acid made it possible for Winkler to isolate the new element.[4]

Production[edit]

Germanium disulfide is created by passing hydrogen sulfide with germanium chloride in a concentrated hydrochloric acid solution.

References[edit]

  1. ^ a b Johnson, O. H. (1952). "Germanium and its Inorganic Compounds". Chemical Reviews 51 (3): 431–469. doi:10.1021/cr60160a002. 
  2. ^ Golubkov, A. V.; Dubrovskii, G. B.; Shelykh, A. I. (1998). "Preparation and properties of GeS2 single crystals". Semiconductors 32 (7): 734–735. doi:10.1134/1.1187494. 
  3. ^ Zachariasen, W. H. (1936). "The Crystal Structure of Germanium Disulphide". Journal of Chemical Physics 4 (9): 618. doi:10.1063/1.1749915. 
  4. ^ Winkler, C. (1886). "Mittheilungen über das Germanium". Journal für Praktische Chemie 34 (1): 177–229. doi:10.1002/prac.18860340122.