Beryllium sulfide

Crystal structure
	__ Be 2+ __ S 2−
Crystal system	cubic
Space group	F 4 3 m (No. 216)
General
Surname	Beryllium sulfide
Ratio formula	BeS
Brief description	gray to white solid
External identifiers / databases
EC number	237-064-6
ECHA InfoCard	100.033.680
PubChem	83605
Wikidata	Q4445833
properties
Molar mass	41.08 g mol −1
Physical state	firmly
density	2.36 g cm −3
Refractive index	1.741
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 . Refractive index: Na-D line , 20 ° C

Beryllium sulfide is an inorganic chemical compound of beryllium from the group of sulfides .

Extraction and presentation

Beryllium sulfide can be obtained by synthesizing the elements at 1150 ° C, by reacting beryllium chloride with hydrogen sulfide (which does not result in completely chloride-free beryllium sulfide), by reducing beryllium sulfate or by reacting beryllium oxide with carbon disulfide .

{\ displaystyle \ mathrm {Be + S \ longrightarrow BeS}}

{\ displaystyle \ mathrm {BeCl_ {2} + H_ {2} S \ longrightarrow BeS + 2 \ HCl}}

properties

Beryllium sulfide is a gray to white powder that has a faint odor of hydrogen sulfide in the air. It crystallizes in the zinc blende type (a = 485 pm). It hydrolyzes slowly in water and is rapidly broken down by acids and carbon dioxide . The compound is an indirect semiconductor with a direct band gap of 7.4 eV and an indirect band gap of 4.7 eV.

Individual evidence

↑ ^a ^b ^c Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 137 ( limited preview in Google Book search).
↑ ^a ^b ^c ^d ^e Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 894.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ Kenneth A. Walsh: Beryllium Chemistry and Processing . ASM International, 2009, ISBN 0-87170-721-7 , pp. 127 ( limited preview in Google Book search).

[Richard_C._Ropp-1] Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 137 ( limited preview in Google Book search).

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 894.

[NV-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.

[Kenneth_A._Walsh-4] Kenneth A. Walsh: Beryllium Chemistry and Processing . ASM International, 2009, ISBN 0-87170-721-7 , pp. 127 ( limited preview in Google Book search).