Germanium disulfide
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| Names | |
|---|---|
| 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)
|
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 GeS2. 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]
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.[5]
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.[6]
References
- ^ a b Johnson, O. H. (1952). "Germanium and its Inorganic Compounds". Chemical Reviews. 51 (3): 431–469. doi:10.1021/cr60160a002.
- ^ Golubkov, A. V.; Dubrovskii, G. B.; Shelykh, A. I. (1998). "Preparation and properties of GeS2 single crystals". Semiconductors. 32 (7): 734–735. Bibcode:1998Semic..32..734G. doi:10.1134/1.1187494. S2CID 101832592.
- ^ a b Zachariasen, W. H. (1936). "The Crystal Structure of Germanium Disulphide". Journal of Chemical Physics. 4 (9): 618–619. Bibcode:1936JChPh...4..618Z. doi:10.1063/1.1749915.
- ^ Kulikova, L. F.; Lityagina, L. M.; Zibrov, I. P.; Dyuzheva, T. I.; Nikolaev, N. A.; Brazhkin, V. V. (2014). "High-pressure, high-temperature study of GeS2 and GeSe2". Inorg. Mater. 50 (8): 768–774. doi:10.1134/S002016851408010X. S2CID 98354736.
- ^ Winkler, C. (1886). "Mittheilungen über das Germanium". Journal für Praktische Chemie. 34 (1): 177–229. doi:10.1002/prac.18860340122.
- ^ "Unnamed (Ge Sulphide)".
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