Iron (III) sulfide

General
Surname	Iron (III) sulfide
other names	Diiron trisulfide Ferric sulfide
Molecular formula	Fe 2 S 3
Brief description	yellowish gray substance; metastable
External identifiers / databases
CAS number 12063-27-3 cubic PubChem 160957 Wikidata Q420355
properties
Molar mass	207.89 g mol −1
Physical state	firmly
density	4.246 g cm −3
solubility	almost insoluble in water soluble in HCl with evolution of H 2 S
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 .

Iron (III) sulfide Fe ₂ S ₃ is a solid, black substance which, however, breaks down into a yellowish-gray powder mixture of iron (II) sulfide and sulfur at room temperature .

Appearance and properties

If a likewise cooled aqueous solution of sodium sulfide is added to an ice-cooled aqueous solution of iron (III) chloride , a black precipitate of iron (III) sulfide is formed

${\displaystyle \mathrm {2\ FeCl_{3}+\ 3\ Na_{2}S\longrightarrow Fe_{2}S_{3}\downarrow +\ 6\ NaCl} }$

which, however, breaks down into FeS and sulfur above 20 ° C

${\displaystyle \mathrm {Fe_{2}S_{3}\longrightarrow 2\ FeS+S\downarrow } }$

With hydrochloric acid , decomposition takes place according to the following reaction equation:

${\displaystyle \mathrm {Fe_{2}S_{3}+4\ HCl\longrightarrow 2\ FeCl_{2}+2\ H_{2}S\uparrow +\ S\downarrow } }$

The compound has a crystal structure of spinel .

Individual evidence

1. ↑ ^{a b c d e f} D'Ans-Lax: Taschenbuch für Chemiker und Physiker , Volume 3 (1998), p. 458; ISBN 3-540-60035-3
2. ↑ Brockhaus ABC Chemie, FA Brockhausverlag Leipzig 1971, p. 330.
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1657.
5. ↑ H. Römpp, Chemie (1997), p. 1099; ISBN 3-13-734710-6
6. ↑ S. Yamaguchi, H. Wada: Fe2S3 of the spinel type structure with lattice defect. In: Crystal and Technology. 8, 1973, p. 1017, doi : 10.1002 / crat.19730080905 .