Names | |
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Systematic IUPAC name
Germanium(IV) sulfide
[1] | |
Identifiers | |
3D model (
JSmol)
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ChemSpider | |
ECHA InfoCard | 100.031.537 |
EC Number |
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PubChem
CID
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CompTox Dashboard (
EPA)
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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 | |
Heat capacity (C)
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50 J /(mol K) |
Std enthalpy of
formation (ΔfH⦵298) |
-150.06 kJ/mol |
Related compounds | |
Related compounds
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Carbon disulfide
Germanium dioxide |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
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Germanium disulfide or Germanium(IV) sulfide is the inorganic compound with the formula Ge S2. It is a white high-melting crystalline solid. [1] [2] The compound is a 3-dimensional polymer, [3] [4] in contrast to silicon disulfide, which is a one-dimensional polymer. The Ge-S distance is 2.19 Å. [3]
Germanium disulfide was first found in samples of argyrodite. The fact that germanium sulfide does not dissolve in aqueous acid facilitated its isolation. [5]
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. [6]
It is insoluble in water, it dissolves in aqueous solutions of sodium sulfide owing to the formation of thiogermanates:
Natural GeS2 is restricted to fumaroles of some burning coal-mining waste heaps. [7]