Lithium arsenide

Lithium arsenide describes inorganic compounds with the chemical formula Li_xAs 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

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Lithium arsenide

Names
Other names Litium monoarsenide
Identifiers
CAS Number	Li3As: 12044-22-3 Y
3D model (JSmol)	Li3As: Interactive image LiAs: Interactive image Li3As7: Interactive image
ChemSpider	Li3As: 74786 LiAs: 9151176
ECHA InfoCard	100.031.761
EC Number	Li3As: 234-950-4
PubChem CID	Li3As: 82878 LiAs: 10975975
CompTox Dashboard (EPA)	Li3As: DTXSID5065221
InChI 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
SMILES 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
Chemical formula	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[citation needed]
Structure(LiAs)[1]
Crystal structure	Monoclinic
Space group	P21/n
Lattice constant	a = 9.54 Å, b = 5.24 Å, c = 5.79 Å α = 90°, β = 95.267°, γ = 90°
Formula units (Z)	8
Structure(Low Temperature Li3As7)[2]
Crystal structure	Orthorhombic
Space group	Pbca
Lattice constant	a = 12.466 Å, b = 22.489 Å, c = 12.592 Å α = 100.5°, β = 101.5°, γ = 104.5°
Lattice volume (V)	3530.1 Å3
Formula units (Z)	16
Related compounds
Other anions	Lithium sulfide Lithium antimonide
Other cations	Sodium arsenide Calcium arsenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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