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]

Cobalt arsenide
Names
Other names
arsanylidynecobalt, cobalt monoarsenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.043.775
EC Number
  • 248-168-6
  • InChI=1S/As.Co
    Key: NMLUQMQPJQWTFK-UHFFFAOYSA-N
  • [As]#[Co]
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]
GHS06: ToxicGHS09: Environmental hazard
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).
Infobox references

Physical properties

Cobalt arsenide crystallizes in the orthorhombic system, space group Pnam, parameter parameters a = 0.515 nm, b = 0.596 nm, c = 0.351 nm, Z = 4.

Cobalt arsenide is 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
  1. "Cobalt arsenide". pubchem.ncbi.nlm.nih.gov. Retrieved 23 January 2022.
  2. 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.
  3. Toxic Substances Control Act (TSCA) Chemical Substance Inventory. U.S. Government Printing Office. 1979. p. 16. Retrieved 20 January 2022.
  4. "Modderite Mineral Data". webmineral.com. Retrieved 20 January 2022.
  5. Gramsch, Stephen (December 2004). "Crystal Chemistry of Transition Metal Arsenides and the High Pressure Behavior of CoAs". Retrieved 20 January 2022.
  6. Heyding, R. D.; Calvert, L. D. (1 May 1957). "Arsenides of Transition Metals: The Arsenides of Iron and Cobalt". Canadian Journal of Chemistry. 35 (5): 449–457. doi:10.1139/v57-065. Retrieved 20 January 2022.
  7. "Cobalt(III) Arsenide". American Elements. Retrieved 20 January 2022.
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