Chemistry:Zinc diphosphide
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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. 92[1] | |
| Hazards | |
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| GHS Signal word | Danger |
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
- ↑ 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. doi:10.1088/1361-648X/aba720. PMID 32679574. Bibcode: 2020JPCM...32R5401L.
- ↑ 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. doi:10.1016/0022-3697(63)90140-9. Bibcode: 1963JPCS...24..333H.
- ↑ 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. http://infoscience.epfl.ch/record/265366.
- ↑ 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.
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