ChemInform Abstract: The Phase Co1-xNixSn2: Structural Variations Based on the Stacking of Two Different Planar Nets.
✍ Scribed by U. HAEUSSERMANN; A. R. LANDA-CANOVAS; S. LIDIN
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 30 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0931-7597
No coin nor oath required. For personal study only.
✦ Synopsis
The Phase Co1-xNixSn2: Structural Variations Based on the Stacking of Two Different Planar Nets. -Samples of the quasibinary title system with 0.23 ¡ x ¡ 0.59 are prepared and their structures are studied as a function of the synthesis conditions. In the presence of a large excess of Sn, heating at 500 • C results in Co1-xNixSn2 compounds crystallizing with PdSn2 structure (tetragonal, I41/acd, Z = 16), whereas at 550 • C or from stoichiometric mixtures of the elements, the orthorhombic CoGe2-type structure (Aba2, Z = 8) is formed. Both structures, determined by single-crystal XRD methods, are builtup from three consecutive planar nets 44, 32434, 44 formed by Sn atoms, but arranged in different stacking sequences. In the low-temp. PdSn2 modification and in the CoGe2 structure type ABCD and AB stackings, resp., are realized. Other stacking variants in this system are discussed.