Preparation and some chemical properties of protactinium metal
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 22,p. 2291-2296
- https://doi.org/10.1039/dt9770002291
Abstract
The preparation of protactinium metal by a modified van Arkel technique is described. The product exhibits the body-centred tetragonal structure with a0= 3.931(1) and c0= 3.236(1)Å. Conditions for conversion of the metal into the tetra- and penta-halides (PaX4, X = Cl or Br; PaX5, X = F, Cl, Br, or I) by reactions involving a variety of halogenating agents are described. Reaction with gaseous hydrogen yields either α-PaH3(250 °C) or β-PaH3(400 °C) whrch are isostructural with their uranium analogues. The stability of the metal on exposure to the atmosphere has been confirmed.Keywords
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