Beryllium sulfide

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Beryllium sulfide
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.033.680 Edit this at Wikidata
EC Number
  • 237-064-6
  • InChI=1S/Be.S
    Key: FQDSYGKTHDFFCM-UHFFFAOYSA-N
  • [Be]=S
Properties
BeS
Molar mass 41.077 g/mol
Appearance white crystalline
Density 2.36 g/cm3
Melting point 1,800 °C (3,270 °F; 2,070 K) decomposes
Decomposes
Band gap 7.4 eV
1.741
Structure
cubic
F43m[1]
Thermochemistry
34 J/mol K
34 J/mol K
Std enthalpy of
formation
(ΔfH⦵298)
 -235 kJ/mol
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[2]
REL (Recommended)
 Ca C 0.0005 mg/m3 (as Be)[2]
IDLH
(Immediate danger)
 Ca [4 mg/m3 (as Be)][2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Beryllium sulfide (BeS) is an

ionic compound from the sulfide group with the formula BeS. It is a white solid with a sphalerite structure that is decomposed by water and acids.[3]

Preparation

Beryllium sulfide powders can be prepared by the reaction of sulfur and beryllium in a hydrogen atmosphere by heating the mixture for 10-20 minutes at temperatures from 1000-1300 °C. If done at 900 °C, there is beryllium metal impurities.[4]

Alternatively, it can be prepared by the reaction of beryllium chloride and hydrogen sulfide at 900 °C.[3][4]

References

  1. doi:10.1021/ac60113a045
    .
  2. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
  3. ^
    ISBN 978-087170721-5
    .
  4. ^
    S2CID 99383696
    .


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