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キーワード:
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要旨:
New germanides with composition RE3Pt4Ge13 (RE = Y, Pr, Sm, Gd, Tb, Tm)
have been prepared by highpressure, high-temperature synthesis. Their
crystal structures have been refined, and the relationship of this new
rhombohedral and monoclinic structure types with the primitive cubic
Yb3Rh4Sn13 prototype is discussed. Band structure calculations within
density functional theory confirm the distorted rhombohedral and
monoclinic structural arrangements to be energetically more favorable
than the simple cubic one. X-ray absorption spectroscopy and magnetic
susceptibility measurements indicate that the RE-atoms are in the +3
oxidation state in all studied compounds.
