Lithium azide

Lithium azide is the lithium salt of hydrazoic acid. It is an unstable and toxic compound that decomposes into lithium and nitrogen when heated.

Lithium azide

__ Li+     __ N3
Lithium azide unit cell[1]
Names
IUPAC name
lithium azide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.039.237
Properties
LiN3
Molar mass 48.96 g·mol−1
Melting point 115 °C (239 °F; 388 K)
36.12 g/100 g (10°C)
62.07 g/100 g (15.5°C)
66.41 g/100 g (16°C)[2]
Solubility 20.26 g/100 g (16°C, ethanol)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

It can be prepared by metathesis reaction between sodium azide and lithium nitrate or lithium sulfate solutions:

NaN3 + LiNO3 → LiN3 + NaNO3
2NaN3 + Li2SO4 → 2LiN3 + Na2SO4[3]

It can also be prepared by reacting lithium sulfate with barium azide.

Ba(N3)2 + Li2SO4 → 2LiN3 + BaSO4[2]

References

  1. Pringle, G. E.; Noakes, D. E. (February 1968). "The crystal structures of lithium, sodium and strontium azides". Acta Crystallogr. B. 24 (2): 262–269. doi:10.1107/S0567740868002062.
  2. Hála, Jiri. "IUPAC-NIST Solubility Data Series. 79. Alkali and Alkaline Earth Metal Pseudohalides" (PDF). nist.gov. Retrieved 31 January 2018.
  3. http://www.lambdasyn.org/synfiles/lithiumazid.htm


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