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| Names | |
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| Systematic IUPAC name Germanium(IV) sulfide | |
| Identifiers | |
| CAS Number | |
| 3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.031.537 
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| EC Number |
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| PubChem CID | |
| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| Properties | |
| Chemical formula | GeS2 |
| Molar mass | 136.75 g·mol |
| Appearance | White, translucent crystals |
| Density | 2.94 g cm |
| 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 |
| Magnetic susceptibility (χ) | −53.3·10 cm/mol |
| Structure | |
| Crystal structure | monoclinic, mP36 |
| Space group | Pc, No. 7 |
| Coordination geometry | tetrahedral at Ge, bent at S |
| Thermochemistry | |
| Heat capacity (C) | 50 J /(mol K) |
| Std enthalpy of formation (ΔfH298) |
-150.06 kJ/mol |
| Related compounds | |
| Related compounds | Carbon disulfide Germanium dioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 Y verify (what is ?)
Infobox references
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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. 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:
- GeS2 + Na2S → Na2GeS3
Natural occurrence
Natural GeS2 is restricted to fumaroles of some burning coal-mining waste heaps.
References
- ^ 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.
- ^ 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.
- P. W. Schenk (1963). "Germanium Disulfide". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2pages=723-724. NY,NY: Academic Press.
- "Unnamed (Ge Sulphide)".
| Germanium compounds | |
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| Ge(II) | |
| Ge(IV) | |
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