Preparation and crystallographic properties of the trichlorides, tribromides, and tri-iodides of uranium, neptunium, and plutonium
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 16,p. 1757-1762
- https://doi.org/10.1039/dt9720001757
Abstract
The preparation of uranium and neptunium trihalides has been investigated. Reduction of the appropriate tetrahalide by zinc at ca. 600 °C provides a safe, reliable route to UCl3, UBr3, UI3, NpCl3, and NpBr3. This reaction is superior to reduction by aluminium metal. Direct union of the elements at 500 °C yields NpI3 with no evidence for the formation of NpI4. The new trivalent oxyhalides NpOCl, NpOBr, and NpOI have been identified crystallographically as by-products of certain reactions. Unit-cell dimensions are reported for these trihalides and oxyhalides, and for PuBr3 and PuI3.Keywords
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