Nickel(II) oxide
Nickel(II) oxide is the chemical compound with the formula NiO. It is the principal oxide of nickel. It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. The mineralogical form of NiO, bunsenite, is very rare. Other nickel oxides have been claimed, for example: Nickel(III) oxide(Ni
2O
3) and NiO
2, but they have yet to be proven by X-ray crystallography in bulk. Nickel(III) oxide nanoparticles have recently (2015) been characterized using powder X-ray diffraction and electron microscopy.
| Names | |
|---|---|
| IUPAC name
Nickel(II) oxide | |
| Other names
Nickel monoxide Oxonickel | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.833 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |
| UN number | 3288 3077 |
CompTox Dashboard (EPA) |
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| Properties | |
| NiO | |
| Molar mass | 74.6928 g/mol |
| Appearance | green crystalline solid |
| Density | 6.67 g/cm3 |
| Melting point | 1,955 °C (3,551 °F; 2,228 K) |
| negligible | |
| Solubility | dissolves in KCN |
| +660.0·10−6 cm3/mol | |
Refractive index (nD) |
2.1818 |
| Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
-240.0 kJ/mol |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H317, H350, H372, H413 | |
| P201, P202, P260, P261, P264, P270, P272, P273, P280, P281, P285, P302+P352, P304+P341, P308+P313, P314, P321, P333+P313, P342+P311, P363, P391, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LDLo (lowest published) |
5000 mg/kg (rat, oral) |
| Safety data sheet (SDS) | JT Baker |
| Related compounds | |
Other anions |
Nickel(II) sulfide Nickel(II) selenide Nickel(II) telluride |
Other cations |
Palladium(II) oxide |
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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