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 = 7.785Ä and has the MgCu2 structure. NpAI3 is simple cubic with a = 4.262Ä and has the AuCu3 structure. NpAI4 is body-centered orthorhombic with a = 4.42Ä, b = 6.26Ä, and c = 13.71Ä. The published description for the atomic positions in UAI4 applies also to NpAI4.
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References
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Discussion on this paper, TP 3654E, may be sent, 2 copies, to AIME by April 1, 1954. Manuscript, July 3, 1953. New York Meeting, February 1954.
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Runnalls, O.J.C. Neptunium-Aluminum Intermetallic Compounds. JOM 5, 1460–1462 (1953). https://doi.org/10.1007/BF03397636
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DOI: https://doi.org/10.1007/BF03397636