Chromium nitride
Chromium nitride is a chemical compound of chromium and nitrogen with the formula CrN. It is very hard, and is extremely resistant to corrosion. It is an interstitial compound, with nitrogen atoms occupying the octahedral holes in the chromium lattice: as such, it is not strictly a chromium(III) compound nor does it contain nitride ions (N3−). Chromium forms a second interstitial nitride, dichromium nitride, Cr2N.
| Names | |
|---|---|
| IUPAC name
Chromium nitride | |
| Other names
Chromium(III) nitride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.041.819 |
| EC Number |
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PubChem CID |
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| UNII | |
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| Properties | |
| CrN | |
| Molar mass | 66.003 g/mol |
| Appearance | Black powder |
| Density | 5.9 g/cm3 |
| Melting point | 1770 ˚C (decomp.) |
| Insoluble | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
37.75 J K−1 mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
−117.15 kJ/mol |
| Hazards | |
| Flash point | Non-flammable |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1 mg/m3 |
REL (Recommended) |
TWA 0.5 mg/m3 |
IDLH (Immediate danger) |
250 mg/m3 |
| Related compounds | |
Related compounds |
Dichromium nitride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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