Protactinium(IV) oxide explained

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 HF.^{[1] [2]}

As protactinium(IV) oxide, like other protactinium compounds, is radioactive, toxic and very rare, it has no known technological use.

Notes and References

1. 10.1021/ja01652a011 . 1954 . Sellers . Philip A. . Fried . Sherman . Elson . Robert E. . Zachariasen . W. H. . Journal of the American Chemical Society . 76 . 5935 . The Preparation of Some Protactinium Compounds and the Metal . 23.
2. Boris F. Myasoedov, H. W. Kirby, & Ivan G. Tananaev (2006) Protactinium, Chapter 4 in Morss, Lester R. & Edelstein, Norman M. & Fuger, Jean, (edit.) The Chemistry of the Actinide and Transactinide Elements (PDF) (3. painos). Dordrecht: Springer. ss. 161–252.