title: Intermetallic germanides with non-centrosymmetric structures derived from the Yb3Rh4Sn13 type.
abstract: New germanides with composition RE3Pt4Ge13 (RE = Y, Pr, Sm, Gd, Tb, Tm) have been prepared by high-pressure, 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.
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany. roman.gumeniuk@physik.tu-freiberg.de.
authors.forename: R
authors.initials: R
authors.lastname: Gumeniuk
authors.forename: M
authors.initials: M
authors.lastname: Schöneich
authors.forename: K O
authors.initials: KO
authors.lastname: Kvashnina
authors.forename: L
authors.initials: L
authors.lastname: Akselrud
authors.forename: A A
authors.initials: AA
authors.lastname: Tsirlin
authors.forename: M
authors.initials: M
authors.lastname: Nicklas
authors.forename: W
authors.initials: W
authors.lastname: Schnelle
authors.forename: O
authors.initials: O
authors.lastname: Janson
authors.forename: Q
authors.initials: Q
authors.lastname: Zheng
authors.forename: C
authors.initials: C
authors.lastname: Curfs
authors.forename: U
authors.initials: U
authors.lastname: Burkhardt
authors.forename: U
authors.initials: U
authors.lastname: Schwarz
authors.forename: A
authors.initials: A
authors.lastname: Leithe-Jasper