Lithium arsenide

Lithium arsenide
Names
Other names
Litium monoarsenide
Identifiers
  • Li3As: 12044-22-3 Y
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.761
EC Number
  • Li3As: 234-950-4
  • InChI=1S/As.3Li
    Key: NVMVLBOIYVUMOZ-UHFFFAOYSA-N
  • LiAs: InChI=1S/As.Li
    Key: FKQOMXQAEKRXDM-UHFFFAOYSA-N
  • Li3As7: InChI=1S/As7.3Li/c1-4-2-6-5(1)7(6)3-4;;;/q-3;3*+1
    Key: NEEYWAPSSYXKNR-UHFFFAOYSA-N
  • Li3As: [Li][As]([Li])[Li]
  • LiAs: [Li][As]
  • Li3As7: [Li+].[Li+].[Li+].[As]12[As-][As]3[As-][As]1[As]2[As-]3
Properties
  • LiAs
  • Li3As
  • Li3As7
Molar mass
  • 81.86 g.mol−1 (LiAs)
  • 95.74 g⋅mol−1 (Li3As)
  • 545.27 g⋅mol−1 (Li3As7)
Appearance red-brown
Density 3.71 g/cm3
Structure(LiAs)[1]
Monoclinic
P21/n
a = 9.54 Å, b = 5.24 Å, c = 5.79 Å
α = 90°, β = 95.267°, γ = 90°
8
Structure(Low Temperature Li3As7)[2]
Orthorhombic
Pbca
a = 12.466 Å, b = 22.489 Å, c = 12.592 Å
α = 100.5°, β = 101.5°, γ = 104.5°
3530.1 Å3
16
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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.[3] It can also be produced by heating the elements.[4]

3 Li + As → Li3As

Other lithium arsenides

  • Chain of As atoms in LiAs. The As−As distances are about 2.45 Å.[1]
  • structure of As3−7 cage in Li3As7.[2]

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

References

  1. ^ a b Donnay, Joseph Désiré Hubert (1963). Crystal Data; Determinative Tables. American Crystallographic Association. p. 211. Retrieved 27 January 2026.
  2. ^ a b 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.
  3. ^ 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.
  4. ^ 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.
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