Beryllium nitride

Beryllium nitride, Be3N2, is a nitride of beryllium. It can be prepared from the elements at high temperature (1100–1500 °C); unlike beryllium azide or BeN6, it decomposes in vacuum into beryllium and nitrogen. It is readily hydrolysed forming beryllium hydroxide and ammonia. It has two polymorphic forms cubic α-Be3N2 with a defect anti-fluorite structure, and hexagonal β-Be3N2. It reacts with silicon nitride, Si3N4 in a stream of ammonia at 1800–1900 °C to form BeSiN2.

Beryllium nitride
Names
IUPAC name
Beryllium nitride
Other names
triberyllium dinitride
Identifiers
3D model (JSmol)
ECHA InfoCard 100.013.757
EC Number
  • 215-132-6
UNII
  • InChI=1S/3Be.2N
  • InChI=1S/3Be.2N/q3*+2;2*-3
  • InChI=1S/3Be.2N/q;;+2;2*-1
  • [Be]=N[Be]N=[Be]
  • [Be+2].[Be+2].[Be+2].[N-3].[N-3]
  • [Be]=[N-].[Be+2].[N-]=[Be]
Properties
Be3N2
Molar mass 55.051 g·mol−1
Appearance yellow or white powder
Density 2.71 g/cm3
Melting point 2,200 °C (3,990 °F; 2,470 K)
Boiling point 2,240 °C (4,060 °F; 2,510 K) (decomposes)
decomposes
Solubility decomposes in solutions of acid and base
Structure
Cubic, cI80, SpaceGroup = Ia-3, No. 206 (α form)
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)
REL (Recommended)
 Ca C 0.0005 mg/m3 (as Be)
IDLH (Immediate danger)
 Ca [4 mg/m3 (as Be)]
Related compounds
Other cations
 Calcium nitride
Magnesium nitride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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