Chemistry:Cadmium phosphide
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| Other names
Tricadmium diphosphide
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Cd3P2 | |
| Molar mass | 399.178 g/mol |
| Appearance | bluish white[1] or gray[2] |
| Density | 5.96 g/cm3[1] |
| Melting point | 700[1] °C (1,292 °F; 973 K) |
| Electron mobility | 1500 cm2/Vs[1] |
Refractive index (nD)
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3.88[1] |
| Structure | |
| Tetragonal | |
| Hazards | |
| GHS pictograms |   
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| GHS Signal word | Warning |
| H302, H312, H314, H332, H350, H370, H410 | |
| P201, P202, P210, P233, P261, P264, P270, P271, P273, P280, P301+312, P302+352, P304+340, P308+313, P312, P330, P362+364Script error: No such module "Preview warning".Category:GHS errors, P391, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Cadmium phosphide (Cd3P2) is an inorganic chemical compound. It is a grey or white bluish solid semiconductor material with a bandgap of 0.5 eV.[1] It has applications as a pesticide, material for laser diodes and for high-power-high-frequency electronics.[1]
Synthesis and reactions
Cadmium phosphide can be prepared by the reaction of cadmium with phosphorus:
- 6 Cd + P4 → 2 Cd3P2
Structure
Cd3P2 has a room-temperature tetragonal form.
The crystalline structure of cadmium phosphide is very similar to that of zinc phosphide (Zn3P2), cadmium arsenide (Cd3As2) and zinc arsenide (Zn3As2). These compounds of the Zn-Cd-P-As quaternary system exhibit full continuous solid-solution.[3]
Applications
Safety
Like other metal phosphides, it is acutely toxic when swallowed due to the formation of phosphine gas when it reacts with gastric acid. It is also carcinogen and dangerous for the skin, eyes and other organs in a large part due to cadmium poisoning.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "Cadmium Phosphide (Cd3P2) Semiconductors". 2013-08-19. https://www.azom.com/article.aspx?ArticleID=8413.
- ↑ "Cadmium Phosphide Cd3P2". https://www.americanelements.com/cadmium-phosphide-cd3p2-12014-28-7.
- ↑ 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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