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Germanium disulfide

Germanium disulfide
Ball and stick model of crystalline germanium sulfide.
Names
Systematic IUPAC name
Germanium(IV) sulfide[1]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.537
EC Number
  • 234-705-1
Properties
GeS2
Molar mass 136.75 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)
0.45 g/100 mL
Solubility soluble in liquid ammonia
−53.3·10−6 cm3/mol
Structure
monoclinic, mP36
Pc, No. 7
tetrahedral at Ge, bent at S
Thermochemistry
50 J /(mol K)
-150.06 kJ/mol
Related compounds
Related compounds
Carbon disulfide

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

Except where otherwise noted, 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

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

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

Natural occurrence

Natural GeS2 is restricted to fumaroles of some burning coal-mining waste heaps.[5]

References

  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.
  5. ^ [www.mindat.org]