Neptunium-Aluminum Intermetallic Compounds

descriptionPublicationkeyboard_double_arrow_right Article 01 Nov 1953 English Publisher:Springer Science and Business Media LLCJournal:JOM, volume 5, pages 1,460-1,462 (issn: 1047-4838, eissn: 1543-1851,

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Authors: O. J. C. Runnalls;

doi: 10.1007/bf03397636

Neptunium-Aluminum Intermetallic Compounds

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Abstract

The intermetallic compounds NpAI2, NpAI3, and NpAI4 have been prepared, and examined by X-ray diffraction methods. The compounds are isostructural with the corresponding U-AI compounds. NpAI2 is face-centered cubic with a = 7.785A and has the MgCu2 structure. NpAI3 is simple cubic with a = 4.262A and has the AuCu3 structure. NpAI4 is body-centered orthorhombic with a = 4.42A, b = 6.26A, and c = 13.71A. The published description for the atomic positions in UAI4 applies also to NpAI4.

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