Transition-metal stannides with high tin content: Os4Sn17, RhSn3, RhSn4 and IrSn4

Abstract

The title compounds have been prepared in well crystallized form by lengthy annealing of the elemental components with the atomic ratios varying between 1 : 3 and 1 : 10. The tin-rich matrix was dissolved in dilute hydrochloric acid. The crystal structures of these stannides were determined from single-crystal X-ray data.

Syntheses, Crystal Structures, and Properties of EuRhIn, EuIr2, and EuIrSn2

“…Each iridium atom has six tin neighbors at an average Ir}Sn distance of 274 pm, slightly longer than the sum of Paulings single bond radii of 266 for iridium and tin (24). Similar Ir-Sn distances (271 to 287 pm) also occur for the eight tin neighbors of the iridium atoms in -IrSn (36). The Ir-Sn polyanion is emphasized in the lower part of Fig.…”

Crystal Structure, Specific Heat, and119Sn Mössbauer Spectroscopy of CeRu4Sn6: A Ternary Stannide with Condensed, Distorted RuSn6Octahedra

“…Even the shortest Sn1-Sn2 distance of 322.3 pm is still longer than in white tin (4;302 and 2;318 pm) (31), indicating only very weak tin-tin interactions. Such a wide range of tin-tin contacts is typically observed in binary transition metal stannides (32,33) and also in Ce Sn and Ce Sn (28,29). The Sn2 atoms have only CN14 with 4 ruthenium, 2 cerium, and 8 tin neighbors.…”

Polymorphism of IrSn4

“…This highpressure form was the first discovered polymorph of IrSn 4 . The structure of the trigonal low-temperature form (a-IrSn 4 ), which has been published by Lang and Jeitschko (7), is quite different from that of HP-IrSn 4 and b-IrSn 4 . In order to get some insight into the relative stability of the IrSn 4 polymorphs we performed ab initio calculations in the framework of density functional theory employing pseudopotentials and a plane wave basis set.…”