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
Other lithium arsenides
Chain of As atoms in LiAs. The As-As distances are about 245
pm.,[3]
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 groupP21/c,[3] cell parameters a = 0.579 nm, b = 0.524 nm, c = 1.070 nm, β = 117.4°, Z = 8.[6]
^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.
^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.