Zinc arsenide
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Other names
trizinc diarsenide
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.031.338 ![]() |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
Zn3As2 | |
Molar mass | 345.984 g/mol |
Appearance | Silver grey[1] |
Density | 5.53 g/cm3[1] |
Melting point | 1,015 °C (1,859 °F; 1,288 K) |
Insoluble[1] | |
Structure | |
Tetragonal | |
Hazards | |
GHS labelling: | |
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Signal word
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Danger |
H301, H331, H350, H410 | |
P201, P202, P222, P231+P232, P261, P264, P270, P271, P273, P280, P281, P301+P310+P330, P304+P340, P308+P313, P321, P370+P378, P391, P403+P233, P405, P422, P501 | |
NFPA 704 (fire diamond) | ![]()
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Safety data sheet (SDS) | [1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Zinc arsenide (Zn3As2) is a binary compound of zinc with arsenic which forms gray tetragonal crystals. It is an inorganic semiconductor with a band gap of 1.0 eV.[2]
Synthesis and reactions[]
Zinc arsenide can be prepared by the reaction of zinc with arsenic
- 3 Zn + 2 As → Zn3As2
Structure[]
Zn3As2 has a room-temperature tetragonal form that converts to a different tetragonal phase at 190 °C and to a third phase at 651 °C.[3] In the room-temperature form, the zinc atoms are tetrahedrally coordinated and the arsenic atoms are surrounded by six zinc atoms at the vertices of a distorted cube. The crystalline structure of zinc arsenide is very similar to that of cadmium arsenide (Cd3As2), zinc phosphide (Zn3P2) and cadmium phosphide (Cd3P2). These compounds of the Zn-Cd-P-As quaternary system exhibit full continuous solid-solution.[4]
Electronic structure[]
Its lowest direct and indirect bandgaps are within 30 meV or each other.[2]
References[]
- ^ a b c d "LTS Research Laboratories, Inc. Safety Data Sheet: Zinc Arsenide" (PDF). ltschem.com. Retrieved 2020-10-26.
- ^ a b Botha, J. R.; Scriven, G. J.; Engelbrecht, J. A. A.; Leitch, A. W. R. (1999). "Photoluminescence properties of metalorganic vapor phase epitaxial Zn3As2". Journal of Applied Physics. 86 (10): 5614–5618. doi:10.1063/1.371569.
- ^ Okamoto, H. (1992). "The As-Zn (arsenic-zinc) system". Journal of Phase Equilibria. 13 (2): 155–161.
- ^ 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.
- Zinc compounds
- Arsenides
- II-V semiconductors
- II-V compounds
- Soviet chemical weapons program
- Inorganic compound stubs