Preparation of Rare Metallic Actinides ( exp 248 Cm, exp 249 Bk, exp 249 Cf) and Investigation of Their Crystal Structure

exp 248 Cm and exp 249 Bk metals were prepared by thermal reduction of their oxides with Th and metallic exp 249 Cf with metallic La. These rare actinide samples of 1.0 mg in mass were thin layers on a flat substrate and were investigated by X-ray technique. Dhcp lattice parameters of alpha -Cm, alp...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 1989-09, Vol.143 (1), p.253-259
Main Authors: Seleznev, A G, Radchenko, V M, Shushakov, V D, Ryabinin, M A, Droznik, R R, Lebedeva, L S, Vasilyev, V A
Format: Article
Language:English
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Summary:exp 248 Cm and exp 249 Bk metals were prepared by thermal reduction of their oxides with Th and metallic exp 249 Cf with metallic La. These rare actinide samples of 1.0 mg in mass were thin layers on a flat substrate and were investigated by X-ray technique. Dhcp lattice parameters of alpha -Cm, alpha -Bk and alpha -Cf as main phases in X-ray diagrams are presented. The effect of impurities on the alpha -Cm lattice parameters is shown. Fcc lattices for the high temperature form of Cm metal ( beta -Cm) with a = 0.4933 nm, and of curium and berkelium monoxides (a = 0.502-0.504 nm and a = 0.5002 nm, respectively) have been observed. Thermal expansion coefficients for alpha -Cm and alpha -Bk at 80-300K were calculated. Identification problems of fcc lattices and oxidation features of metals prepared are discussed. 13 ref.--AA
ISSN:0236-5731