The crystal structure of vanadium compounds and the corresponding superconducting transformation temperature are considered as functions of the position of the second component in the periodic system. Among binary vanadium compounds with unknown TK only V3Al and V3In can have a high critical temperature. The search for new superconducting compounds is most promising in ternary systems in which compounds of the Cr3Si are formed. The alloying of binary vanadium compounds with this kind of structure and a high TK always reduces the latter. When continuous solid solutions are formed between superconducting compounds of the Cr3Si type the critical temperature changes smoothly with the composition of the alloys and may be expressed by empirical exponential functions. In such systems (with certain ranges of concentration) there is an approximately linear relationship between TK and the lattice constant of the solid solutions.


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© Consultants Bureau, New York 1970

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  • Yu. V. Efimov

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