Beryllium sulfide

Summary

Beryllium sulfide (BeS) is an ionic compound from the sulfide group [2] with the formula BeS.

Beryllium sulfide
Sphalerite polyhedra.png
Identifiers
  • 13598-22-6
3D model (JSmol)
  • Interactive image
ChemSpider
  • 44415277
ECHA InfoCard 100.033.680 Edit this at Wikidata
EC Number
  • 237-064-6
  • 83605
  • DTXSID1065556 Edit this at Wikidata
  • 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
Band gap 7.4 eV
1.741
Structure
cubic
Thermochemistry
34 J/mol K
34 J/mol K
-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)[1]
REL (Recommended)
Ca C 0.0005 mg/m3 (as Be)[1]
IDLH (Immediate danger)
Ca [4 mg/m3 (as Be)][1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

PreparationEdit

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.

Alternatively, it can be prepared by the reaction of beryllium chloride and hydrogen sulfide at 1150 °C, though this reaction will leave chlorine impurities.

ReferencesEdit

  1. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Kenneth A. Walsh (2009). Beryllium Chemistry and Processing. ASM International. p. 127. ISBN 978-087170721-5.