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Synthesis and Structure of YbPdSn2

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Synthesis and Structure of YbPdSn

2

Dirk Kußmann and Rainer Pöttgen

Department Chemie, Ludwig-Maximilians- Universität München, Butenandtstraße 5Ð13 (Haus D), D-81377 München, Germany Reprint requests to R. Pöttgen.

E-mail: rapch@cup.uni-muenchen.de Z. Naturforsch.56b,446Ð448 (2001);

received March 22, 2001

Stannide, CrystalStructure, Solid State Synthesis New ternary stannide YbPdSn2was synthesized from the elements in a sealed tantalum tube in a high-frequency furnace. YbPdSn2 was charac- terized through X-ray powder and single crystal data: Cmcm, a = 442.4(2), b = 1108.6(3), c = 738.4(2) pm,wR2 = 0.0450, 317F2values, and 16 variable parameters. YbPdSn2 crystallizes with the MgCuAl2 type structure, a ternary ordered variant of the Re3B type. The tin sublattice of YbPdSn2corresponds to a distorted lonsdaleite- like arrangement with Sn-Sn distances varying from 303 to 336 pm.

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