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 | |||||||||||||
|
|||||||||||||
properties | |||||||||||||
Molar mass | 596.87 g mol −1 | ||||||||||||
Physical state |
firmly |
||||||||||||
density |
4.866 g cm −3 |
||||||||||||
solubility |
almost insoluble in water |
||||||||||||
safety instructions | |||||||||||||
|
|||||||||||||
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 .
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).