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3D model (JSmol)
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| Properties | |
| ZnP2 | |
| Molar mass | 127.33 g/mol |
| Appearance | red crystals |
| Density | 3.53 g/cm3 |
| Melting point | 1,040 °C (1,900 °F; 1,310 K) |
| Structure | |
| Tetragonal, tP24 | |
| P41212, No. 921 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zinc diphosphide (ZnP2) is an inorganic chemical compound. It is a red semiconductor solid with a band gap of 2.1 eV.2 It is one of the two compounds in the zinc-phosphorus system, the other being zinc phosphide (Zn3P2).
Synthesis and reactions
Zinc diphosphide can be prepared by the reaction of zinc with phosphorus.
- 2 Zn + P4 → 2 ZnP2
Structure
ZnP2 has a room-temperature tetragonal form that converts to a monoclinic form at around 990 °C.3 In both of these forms, there are chains of P atoms, helical in the tetragonal, semi-spiral in the monoclinic.4
This compound is part of the Zn-Cd-P-As quaternary system and exhibit partial solid-solution with other binary compounds of the system.5
Safety
ZnP2, like Zn3P2, is highly toxic due to the release of phosphine gas when the material reacts with gastric acid.
References
References
- Litvinchuk, A. P.; Valakh, M. Ya. (2020). "Raman and infrared phonons in tetragonal ZnP2 and CdP2 crystals: A density functional study". Journal of Physics: Condensed Matter. 32 (44): 445401. Bibcode:2020JPCM...32R5401L. doi:10.1088/1361-648X/aba720. PMID 32679574. S2CID 220629594.
- Hegyi, I. J.; Loebner, E. E.; Poor (Jr.), E. W.; White, J. G. (1963). "Two crystal forms of ZnP2, their preparation, structure, and optoelectronic properties". Journal of Physics and Chemistry of Solids. 24 (2): 333–337. Bibcode:1963JPCS...24..333H. doi:10.1016/0022-3697(63)90140-9.
- Ghasemi, M.; Stutz, E. Z.; Escobar Steinvall, S.; Zamani, M.; Fontcuberta i Morral, A. (2019). "Thermodynamic re-assessment of the Zn–P binary system". Materialia. 6 100301. doi:10.1016/j.mtla.2019.100301. S2CID 140792691.
- Hans Georg von Schnering and Wolfgang Hönle, 1994, Phosphides: Solid State Chemistry, Encyclopedia of Inorganic chemistry, Ed. R Bruce King, John Wiley and Sons, ISBN 0-471-93620-0
- Trukhan, V. M.; Izotov, A. D.; Shoukavaya, T. V. (2014). "Compounds and solid solutions of the Zn-Cd-P-As system in semiconductor electronics". Inorganic Materials. 50 (9): 868–873. doi:10.1134/S0020168514090143. S2CID 94409384.