Cobalt arsenide
Names
Other names
arsanylidynecobalt, cobalt monoarsenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.043.775 Edit this at Wikidata
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).

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]

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. ^ a b 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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