|   | |
| Names | |
|---|---|
| IUPAC name Nickel (III) oxide | |
| Other names Nickel sesquioxide, nickel trioxide | |
| Identifiers | |
| 3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.013.835 | 
| EC Number | 
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|  PubChem CID | |
| RTECS number | 
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| UNII | |
|  CompTox Dashboard (EPA) | |
| 
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| 
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| Properties | |
| Ni2O3 | |
| Molar mass | 165.39 g/mol | 
| Appearance | black-dark gray solid | 
| Density | 4.84 g/cm3 | 
| Melting point | 600 °C (1,112 °F; 873 K) (decomposes) | 
| negligible | |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Nickel (III) oxide is the inorganic compound with the formula Ni2O3. It is not well characterized, [1] and is sometimes referred to as black nickel oxide. Traces of Ni2O3 on nickel surfaces have been mentioned. [2] [3]
Nickel (III) oxide has been studied theoretically since the early 1930s, [4] supporting its unstable nature at standard temperatures. A nanostructured pure phase of the material was synthesized and stabilized for the first time in 2015 from the reaction of nickel(II) nitrate with sodium hypochlorite and characterized using powder X-ray diffraction and electron microscopy. [5]