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New clathrate-like compound Eu7Cu44Sb23-δ: synthesis, crystal and electronic structure, and the effect of As-for-Sb substitution on the magnetic properties

Plokhikh, Igor V. ; Charkin, Dmitry O. ; Kuznetsov, Alexey N. ; Verchenko, Valery Yu ; Ignatiev, Ivan A. ; Kazakov, Sergey M. ; Tsirlin, Alexander A. ; Shevelkov, Andrei V.


A new intermetallic compound, ternary antimonide Eu7Cu44Sb23-delta [Fm-3m, a = 17.4346(1)angstrom, delta = 0.5(1)] is reported. The compound forms a continuous substitutional solid solution with its Eu7Cu44As23 archetype. The gradual substitution of Sb for As evokes partial disorder in the copper-pnictogen framework that becomes more pronounced with an increase of the Sb content and changes ...


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