The new ternary actinide metal diborides U2MoB6, U2ReB6, U2OsB6, URuB4 and UOsB4 were prepared and found to crystallize with either the Y2ReB6 or the ThMoB4 type of structure. LuRuB4 and LuOsB4 crystallize with the YCrB4 type of structure. In a ternary series of solid solutions YRh3B1-x (0 ≤ x ≤ 0.45 at 1400 °C), boron was found to stabilize a Cu3Au type of structure. The superconductivity of the new uranium compounds and of a series of ternary transition metal borides was investigated; no superconductivity was observed for temperatures as low as 1.3-1.5 K. The cubic perovskite or filled Cu3Au structure is discussed as a type which is very unfavorable for the occurrence of superconductivity.
|Number of pages||10|
|Journal||Journal of the Less-Common Metals|
|State||Published - May 1983|
Bibliographical noteFunding Information:
P.R. wishes to express his gratitude to the Austrian Science Foundation (Fonds zur Forderung der Wissenschaftlichen Forschung in Gsterreich) for Grant 4605. His thanks are also due to the Hochschuljubilaumsstiftung der Stadt Wien for the KD-530 microdensitometer. The authors wish to thank Dr. D. C. Johnston, Exxon Research and Engineering Company, for his kind permission to use his unpublished data and for helpful discussions.
ASJC Scopus subject areas
- Engineering (all)