Lithium arsenide

Lithium arsenide describes inorganic compounds with the chemical formula LixAs where x can range from about 0.5 to 3. A common derivative is Li3As, which is prepared by the reduction of arsenic with a solution of lithium in ammonia.[1] It can also be produced by heating the elements.[2]

3 Li + As → Li3As
Lithium arsenide
Names
Other names
Litium monoarsenide
Identifiers
  • InChI=1S/As.Li
    Key: FKQOMXQAEKRXDM-UHFFFAOYSA-N
Properties
AsLi3
Molar mass 95.74 g·mol−1
Appearance red-brown
Density 3.71 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Other lithium arsenides
  • Chain of As atoms in LiAs. The As-As distances are about 245 pm.,[3]
  • structure of As73- cage in Li3As7.[4]

The arsenic-rich arsenides are often classified as zintl phases.

  • Li3As7 adopts a structure akin to the heptaphosphide.[4][5]
  • Lithium monoarsenide (LiAs) forms monoclinic crystals, space group P21/c,[3] cell parameters a = 0.579 nm, b = 0.524 nm, c = 1.070 nm, β = 117.4°, Z = 8.[6]

10.1107/S0365110X59000111

References
  1. E. Donges (1963). "Phosphides, Arsenides, Antimonides and Bismuthides of Alkali Metals from the Elements". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2. NY, NY: Academic Press. p. 985.
  2. Wegner, Florian; Kamm, Franziska; Pielnhofer, Florian; Pfitzner, Arno (2022). "Li3As and Li3P revisited: DFT modelling on phase stability and ion conductivity". Zeitschrift für Anorganische und Allgemeine Chemie. 648 (11). doi:10.1002/zaac.202100358.
  3. Donnay, Joseph Désiré Hubert (1963). Crystal Data; Determinative Tables. American Crystallographic Association. p. 211. Retrieved 13 January 2022.
  4. Hönle, W.; Buresch, J.; Peters, K.; Chang, J. H.; Schnering, H. G. von (2002). "Crystal Structure of the Low-Temperature Modification of Trilithium Heptaarsenide, LT-Li3As7". Zeitschrift für Kristallographie - New Crystal Structures. 217: 485–486. doi:10.1524/ncrs.2002.217.jg.485.
  5. None Available (2014). "Materials Data on Li3As7 by Materials Project". LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). doi:10.17188/1283621. OSTI 1283621.
  6. Cromer, D. T. (1 January 1959). "The crystal structure of LiAs". Acta Crystallographica. 12 (1): 36–41. Bibcode:1959AcCry..12...36C. doi:10.1107/S0365110X59000111. Retrieved 13 January 2022.
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