| Names | |
|---|---|
| IUPAC name Protactinium(II) oxide | |
| Identifiers | |
| 3D model (JSmol) | |
| 
 | |
| 
 | |
| Properties | |
| PaO | |
| Molar mass | 247.035 g mol−1 | 
| Appearance | black crystals | 
| Density | 13.44 g/cm3 | 
| Structure | |
| rocksalt [1] | |
| Fm3m, No. 225 | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Protactinium monoxide is a radioactive inorganic compound and one of the oxides of protactinium. Its chemical formula is PaO. It is a black solid that crystallizes in the rock-salt structure. [1] Protactinium monoxide can be produced in minute quantities from the oxidation of protactinium. The protactinium monoxide cation (PaO+) is very active and can activate hydrocarbons such as alkenes. [2]
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