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2005
Structure
D 2000
06- 005
Ternary Indides Ln10 Rh9±xIn20 (Ln: Y, Tb—Tm, Lu) and YbRhIn 2 — Syntheses
and Crystal Chemical Peculiarities. — The ternary title compounds are synthesized
by arc melting of the elements and subsequent annealing in alumina or tantalum crucibles. YbRhIn2 was prepared in a sealed tantalum ampoule in an induction furnace.
X-ray powder and single crystal data for Ln10Rh 9±xIn20 reveal isotypy with the tetragonal Ho10 Ni9In20 type structure (space group P4/nmm, Z = 2). The crystal of
Tm10Rh9In20 shows ideal composition, while the Ln10 Rh9In20 indides with the lighter
rare earth metals contain an additional rhodium site leading to a homogeneity range
according to Ln10 Rh9±xIn20 . YbRhIn2 adopts the orthorhombic MgCuAl2 type structure,
space group Cmcm, Z = 4. The rhodium atoms fill distorted triangles of an orthorhombically distorted YbIn2 substructure. — (LUKACHUK, M.; RODEWALD, U. C.;
ZAREMBA, V. I.; HOFFMANN, R.-D.; POETTGEN*, R.; Z. Anorg. Allg. Chem.
630 (2004) 13-14, 2253-2261; Inst. Anorg. Anal. Chem., Westfael. Wilhelms-Univ.,
D-48149 Muenster, Germany; Eng.) — Schramke
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