Chromium (II) sulfide

Crystal structure
	__ Cr 2+ __ S 2−
General
Surname	Chromium (II) sulfide
Ratio formula	CrS
Brief description	black solid
External identifiers / databases
PubChem	11955372
ChemSpider	10129648
Wikidata	Q4445884
properties
Molar mass	84.1 g mol −1
Physical state	firmly
density	4.85 g cm −3
Melting point	1550 ° C
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Chromium (II) sulfide is an inorganic chemical compound of chromium from the group of sulfides .

Extraction and presentation

Chromium (II) sulfide can be obtained by reacting a stoichiometric mixture of chromium and sulfur at 1000 ° C.

{\ displaystyle \ mathrm {Cr + S \ longrightarrow CrS}}

It is also formed when chromium (III) sulfide is heated , with other phases such as Cr ₃ S ₄ , Cr ₅ S ₆ and Cr ₇ S _{8 being} formed in the meantime .

properties

Pure phase chromium (II) sulfide is a black solid with a monoclinic crystal structure , space group C 2 / c (space group no. 15) , lattice parameters a = 3.826 Å , b = 5.913 Å, c = 6.089 Å and β = 101.6 ° . Even with a small excess of sulfur, a phase with a structure similar to the nickel arsenide type is formed, although other modifications also occur. Chromium (II) sulfide is a semiconductor. Template: room group / 15

Individual evidence

^ ^A ^b ^c ^d Mary Eagleson: Concise Encyclopedia Chemistry . Walter de Gruyter, 1994, ISBN 3-11-011451-8 , p. 225 ( limited preview in Google Book Search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ ^a ^b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1493.
^ ^A ^b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1451.
^ ^A ^b F. Jellinek: The Structures of the Chromium Sulphides. In: Acta Crystallographica , 10, 1957, pp. 620-628, doi: 10.1107 / S0365110X57002200 .

[Mary_Eagleson-1] A ^b ^c ^d Mary Eagleson: Concise Encyclopedia Chemistry . Walter de Gruyter, 1994, ISBN 3-11-011451-8 , p. 225 ( limited preview in Google Book Search).

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[brauer-3] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1493.

[HoWi-4] A ^b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1451.

[Jellinek-5] A ^b F. Jellinek: The Structures of the Chromium Sulphides. In: Acta Crystallographica , 10, 1957, pp. 620-628, doi: 10.1107 / S0365110X57002200 .