Lithium phosphide is an inorganic compound of lithium and phosphorus with the chemical formula Li3P. This dark colored compound is formally the lithium salt of phosphine, consisting of lithium cations Li+ and phosphide anions P3−. It is hazardous to handle because of its high reactivity toward air.[1]
Synthesis
Heating red phosphorus and lithium in an argon atmosphere:[1]
- 12 Li + P4 → 4 Li3P
Reaction of monolithium phosphide and lithium:
- LiP + 2 Li → Li3P
Physical and chemical properties
Lithium phosphide forms red-brown crystals of hexagonal systems, space group P63/mmc,[2] cell parameters a = 0.4264 nm, c = 0.7579 nm, Z = 2.[3][4]
The compound reacts with water to release phosphine:[5]
- Li3P + 3 H2O → 3 LiOH + PH3
Uses
The compound is proposed to be used as a potential electrolyte for solid-state devices.[6]
Related compounds
Reaction of lithium with red phosphorus at 870 °C gives Li3P7.[7]
Further reading
- Nazri, Gholamabbas (1 April 1989). "Preparation, structure and ionic conductivity of lithium phosphide". Solid State Ionics. 34 (1–2): 97–102. doi:10.1016/0167-2738(89)90438-4.
Safety
Alkali metal phosphides are dangerous compounds when exposed to oxygen or moisture.[8]
References
- ^ a b 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.
- ^ "mp-736: Li3P (hexagonal, P6_3/mmc, 194)". materialsproject.org. Retrieved 10 December 2021.
- ^ Seel, Max; Pandey, Ravi (1990). "Band Structure and Electronic Properties of Lithium Phosphide Li3P". MRS Proceedings. 210. doi:10.1557/PROC-210-155. Retrieved 10 December 2021.
- ^ Donnay, Joseph Désiré Hubert (1963). Crystal Data; Determinative Tables. American Crystallographic Association. p. 765. Retrieved 10 December 2021.
- ^ Dong, Yongkwan; DiSalvo, Francis J. (15 April 2007). "Reinvestigation of trilithium phosphide, Li 3 P". Acta Crystallographica Section E. 63 (4): i97–i98. doi:10.1107/S1600536807008422.
- ^ Wan, Chaoying; Huang, Xingyi; Bowen, Chris (23 June 2021). Two-dimensional Inorganic Nanomaterials for Conductive Polymer Nanocomposites. Royal Society of Chemistry. ISBN 978-1-83916-260-2. Retrieved 10 December 2021.
- ^ Manriquez, V.; Hönle, W.; von Schnering, H. G. (1986). "Zur Chemie und Strukturchemie von Phosphiden und Polyphosphiden. 42. Trilithiumheptaphosphid Li3P7: Darstellung, Struktur und Eigenschaften". Zeitschrift für Anorganische und Allgemeine Chemie. 539 (8): 95–109. doi:10.1002/zaac.19865390810.
- ^ Toxic Substances Control Act (TSCA) Chemical Substance Inventory. U.S. Government Printing Office. 1979. p. 9. Retrieved 10 December 2021.
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