Abstract
AbstractThe compound RhCd9+δ(−1.18≤δ≤0.29) has been synthesized and the average structure has been analyzed by single crystal X-ray diffraction. The average structure crystallizes in the face centered cubic space groupF4̅3m(216) and contains ~405 atoms/unit cell. It represents a (2aγ)3-superstructure of cubic γ-brass and is isostructural to Rh7−xMg44+x. The comparison between the structures of RhCd9+δand Rh7−xMg44+xhas been presented using a layer description. The structure of the title phase has also been described by a “cluster” concept. The electronic structure of RhCd9+δ(−1.18≤δ≤0.29) shows that the phase is stabilized by a Hume-Rothery mechanism.
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