Cobalt arsenide

Cobalt arsenide

Names
Other names arsanylidynecobalt, cobalt monoarsenide
Identifiers
CAS Number	27016-73-5  Y
3D model (JSmol)	Interactive image
ChemSpider	105360
ECHA InfoCard	100.043.775
EC Number	248-168-6
PubChem CID	117908
CompTox Dashboard (EPA)	DTXSID401014640
InChI InChI=1S/As.Co Key: NMLUQMQPJQWTFK-UHFFFAOYSA-N
SMILES [As]#[Co]
Properties
Chemical formula	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]
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H410
Precautionary statements	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

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. 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.