Germanium (II) sulfide

Crystal structure
__ Ge 2+      __ S 2−
Crystal system	orthorhombic
Space group	Pnma (No. 62)
Lattice parameters	a  = 10.47  Å , b  = 3.641 Å, c  = 4.297 Å
General
Surname	Germanium (II) sulfide
other names	Germanium monosulfide
Ratio formula	GeS
Brief description	black-gray to red-brown solid
External identifiers / databases
CAS number 12025-32-0 EC number 234-704-6 ECHA InfoCard 100,031,536 PubChem 6367215 Wikidata Q4445841
properties
Molar mass	104.71 g mol −1
Physical state	firmly
density	4.01 g cm −3
Melting point	615 ° C
boiling point	847 ° C
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Germanium (II) sulfide is an inorganic chemical compound of germanium from the group of sulfides .

Extraction and presentation

Germanium (II) sulfide can be obtained by reacting germanium (II) chloride , germanium (IV) oxide or germanium with hydrogen sulfide .

${\displaystyle {\ce {GeCl2 + H2S -> GeS + 2HCl}}}$

${\displaystyle {\ce {GeO2 + H2S + H2 -> GeS + 2 H2O}}}$

properties

Germanium (II) sulfide is a black-gray to red-brown, crystalline solid that is soluble in hydrochloric acid. Dry germanium (II) sulfide is stable in air. It reacts with hydrogen chloride gas even at room temperature.

${\displaystyle {\ce {GeS + 2HCl -> GeCl2 + H2S}}}$

Germanium (II) sulfide is a semiconductor and has an orthorhombic crystal structure with the space group Pnma (space group no. 62) and the lattice parameters a  = 10.47  Å , b  = 3.641 Å and c  = 4.297 Å.

Individual evidence

1. ↑ ^{a b c} Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 737.
2. ^ ^{A b} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 476 ( limited preview in Google Book search).
3. ↑ ^{a b} Germanium (II) sulfide data sheet from Sigma-Aldrich , accessed on January 26, 2014 ( PDF ).
4. ↑ G. Bissert, KF Hesse: Refinement of the structure of germanium (II) sulfide, GeS. In: Acta Crystallographica , B34, 1978, pp. 1322-1323, doi: 10.1107 / S0567740878005439 .