Protactinium(IV) oxide
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IUPAC name
Protactinium(IV) oxide
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3D model (JSmol)
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| O2Pa | |
| Molar mass | 263.03 g·mol−1 |
| Appearance | Black crystals |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Protactinium(IV) oxide is a chemical compound with the formula PaO2. The black oxide is formed by reducing Pa2O5 with hydrogen at 1 550 °C. Protactinium(IV) oxide does not dissolve in H2SO4, HNO3, or HCl solutions, but reacts with the HF.
As protactinium(IV) oxide, like other protactinium compounds, is radioactive, toxic and very rare, it has no known technological use.
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