Cobalt arsenide
Cobalt arsenide is a binary inorganic compound of cobalt and arsenic with the chemical formula CoAs.[2][3] The compound occurs naturally as the mineral modderite.[4][5]
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| Other names
arsanylidynecobalt, cobalt monoarsenide | |
| Identifiers | |
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| Properties | |
| CoAs | |
| Molar mass | 133.85 |
| Appearance | solid |
| Density | 6.73 g/cm3 |
| Melting point | 916 °C (1,681 °F; 1,189 K) |
| Hazards | |
| GHS labelling:[1] | |
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| Danger | |
| H301, H331, H410 | |
| P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P321, P330, P391, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Physical properties
Crystallizes in the orthorhombic system, space group Pnam, parameter parameters a = 0.515 nm, b = 0.596 nm, c = 0.351 nm, Z = 4.
Isostructural with FeAs.[6]
At approximately 6-8 GPa, single crystals of CoAs undergo a transformation to a lower-symmetry phase.[5]
Use
CoAs is used as a semiconductor and in photo optic applications.[7]
References
- "Cobalt arsenide". pubchem.ncbi.nlm.nih.gov. Retrieved 23 January 2022.
- Lide, David R. (29 June 2004). CRC Handbook of Chemistry and Physics, 85th Edition. CRC Press. pp. 4–53. ISBN 978-0-8493-0485-9. Retrieved 20 January 2022.
- Toxic Substances Control Act (TSCA) Chemical Substance Inventory. U.S. Government Printing Office. 1979. p. 16. Retrieved 20 January 2022.
- "Modderite Mineral Data". webmineral.com. Retrieved 20 January 2022.
- Gramsch, Stephen (December 2004). "Crystal Chemistry of Transition Metal Arsenides and the High Pressure Behavior of CoAs". researchgate.net. Retrieved 20 January 2022.
- Heyding, R. D.; Calvert, L. D. (1 May 1957). ARSENIDES OF TRANSITION METALS: THE ARSENIDES OF IRON AND COBALT. pp. 449–457. Retrieved 20 January 2022.
- "Cobalt(III) Arsenide". American Elements. Retrieved 20 January 2022.
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