Cobalt (II, III) sulfide

Crystal structure
__ Co 3+      __ Co 2+      __ S 2−
General
Surname	Cobalt (II, III) sulfide
other names	Cobalt sulfide Tricobalt tetrasulfide Tricobalt tetrasulfide Cobalt (II, III) sulfide Cobalt sulfide
Ratio formula	Co 3 S 4
External identifiers / databases
CAS number 12015-75-7 Wikidata Q1104477
properties
Molar mass	305.03 g mol −1
Physical state	firmly
density	4.86 g cm −3
Melting point	480 ° C (decomposition)
safety instructions
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 .

Cobalt (II, III) sulfide is a chemical compound from the group of sulfides .

Occurrence

Cobalt (II, III) sulfide is found in nature in the form of the mineral Linneit .

Extraction and presentation

Cobalt (II, III) sulfide can be prepared directly from the elements .

${\displaystyle \mathrm {3\ Co+4\ S\longrightarrow Co_{3}S_{4}} }$

properties

Cobalt (II, III) sulfide is a solid that decomposes at temperatures above 480 ° C. It has a cubic crystal structure of the spinel type ( space group Fd 3 m (space group no. 227) ; a = 9.406 Å).

Web links

• Max Heimbrecht, Wilhelm Biltz: About the reaction: Co ₃ S ₄ ⇄ 2 CoS + CoS ₂ , doi : 10.1002 / zaac. 19392420302

Individual evidence

1. ↑ ^{a b c} Entry on cobalt (II, III) sulfide in the GESTIS material database of the IFA , accessed on February 28, 2017(JavaScript required) .
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.
3. ↑ ^{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. 1667.