Rhenium (VII) sulfide

General
Surname	Rhenium (VII) sulfide
other names	Dirhenium heptasulfide
Molecular formula	Re 2 S 7
Brief description	black solid
External identifiers / databases
EC number	234-882-5
ECHA InfoCard	100,031,698
Wikidata	Q4445877
properties
Molar mass	596.87 g mol −1
Physical state	firmly
density	4.866 g cm −3
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	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 .

Rhenium (VII) sulfide is an inorganic chemical compound of rhenium from the group of sulfides .

Extraction and presentation

Rhenium (VII) sulfide can be obtained by reacting a perrhenate solution (for example from potassium perrhenate in hydrochloric acid ) with hydrogen sulfide .

{\ displaystyle \ mathrm {2 \ KReO_ {4} +7 \ H_ {2} S + 2 \ HCl \ longrightarrow Re_ {2} S_ {7} +2 \ KCl + 8 \ H_ {2} O}}

properties

Rhenium (VII) sulfide is a brown-black to black X-ray amorphous powder that usually still contains some water and sulfur . Insoluble in hydrochloric acid, sulfuric acid and alkali sulfides if air is excluded. It is oxidized to ReO ₄^- by oxidizing agents such as nitric acid or bromine water , and slowly also by atmospheric oxygen . At temperatures above 250 ° C it begins to decompose into rhenium (IV) sulfide and sulfur. Hydrogen reduces it to rhenium at elevated temperatures. It crystallizes in a tetragonal crystal system.

use

Rhenium (VII) sulfide is used to produce rhenium, as it is obtained during the roasting process for copper extraction.

Individual evidence

↑ ^a ^b ^c ^d data sheet Rhenium (VII) sulfide monohydrate from AlfaAesar, accessed on July 28, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b ^c 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. 1617.
↑ Erwin Riedel: Inorganic Chemistry . Walter de Gruyter, 2004, ISBN 3-11-018168-1 , p. 811 ( limited preview in Google Book search).
^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 696 ( limited preview in Google Book search).
↑ Horst Briehl: Chemistry of materials . Springer, 2007, ISBN 3-8351-0223-0 , pp. 91 ( limited preview in Google Book search).

[Alfa-1] ta sheet Rhenium (VII) sulfide monohydrate from AlfaAesar, accessed on July 28, 2013 ( PDF )(JavaScript required) .

[brauer-2] 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. 1617.

[Erwin_Riedel-3] Erwin Riedel: Inorganic Chemistry . Walter de Gruyter, 2004, ISBN 3-11-018168-1 , p. 811 ( limited preview in Google Book search).

[Jean_d’Ans,_Ellen_Lax,_Roger_Blachnik-4] Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 696 ( limited preview in Google Book search).

[Horst_Briehl-5] Horst Briehl: Chemistry of materials . Springer, 2007, ISBN 3-8351-0223-0 , pp. 91 ( limited preview in Google Book search).