| Names | |
|---|---|
| Other names arsanylidynecobalt, cobalt monoarsenide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.043.775 |
| EC Number |
|
| |
| |
| 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] | |
  | |
| 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 theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Cobalt arsenide is a binaryinorganic compound ofcobalt andarsenic with the chemical formula CoAs.[2][3] The compound occurs naturally as the mineralmodderite.[4][5]
Cobalt arsenide crystallizes in theorthorhombic system,space groupPnam, 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]
CoAs is used as asemiconductor and in photo optic applications.[7]
