Structure and chemical bonding of PrRuSn

Jan F. Riecken (1) , Adel F. Al Alam (2) , Bernard Chevalier (2) , Samir F. Matar (2) , Rainer Pöttgen (1)

1 Institut für Anorganische und Analytische Chemie
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

The new ternary stannide PrRuSn was synthesized from the elements via arc-melting. PrRuSn is isopointal to the orthorhombic TiNiSi-type structure, space group Pnma. The structure was characterized by X-ray powder and single crystal diffraction: a = 761.7(2), b = 483.9(2) and c = 730.3(3) pm, wR2 = 0.0386, 433 F2 values, 20 variables. The ruthenium and tin atoms in PrRuSn build up a three-dimensional [RuSn] polyanionic network with Ru–Sn distances in the range 268 – 274 pm. The praseodymium atoms fill channels within the polyanion. They bind to the network via short Pr–Ru distances of301 and 302 pm. Electronic structure calculations on PrRuSn and isopointal PrPdSn underline these features and reveal strong T–Sn (T = Ru, Pd) interactions within both solid state structures.

Mots clés: Intermetallics; Stannide; Crystal Chemistry; Chemical Bonding

Domaines: Matériaux

Jan F. Riecken, Adel F. Al Alam, Bernard Chevalier, Samir F. Matar, Rainer Pöttgen. Structure and chemical bonding of PrRuSn. Zeitschrift fur Naturforschung B, 2008, 63 (9), pp.1062-1068. ⟨10.1515/znb-2008-0908⟩. ⟨hal-00319598⟩