You are here

New structures formed by R3Au4Sn3, R5Au8Sn5 and R3Au6Sn5 compounds (R = rare earths)

TitleNew structures formed by R3Au4Sn3, R5Au8Sn5 and R3Au6Sn5 compounds (R = rare earths)
Publication TypeJournal Article
Year of Publication2014
AuthorsFornasini, ML, Mazzone, D, Provino, A, Michetti, M, Paudyal, D, Gschneidner, KA, Manfrinetti, P
JournalIntermetallics
Volume53
Pagination169-176
Date Published10
Type of ArticleArticle
ISBN Number0966-9795
Accession NumberWOS:000338818000021
Keywordscalculation, ce-au-sn, Crystal chemistry of intermetallics, crystal-structure, Diffraction/scattering, Electronic, electronic-structure, Intermetallics, magnetic-susceptibility, Microprobe, sn-119 mossbauer-spectroscopy, stacking variants, stannides, structure, superstructure, ternary-system, ytterbium
Abstract

c = 42.497(7) angstrom, Z = 2, wR2 = 0.078, with refined composition Gd(4.970)AU(8.213)Sn(4.96). Both represent new structures, belonging to the series Rm+n,T2m+nSnm+n (R = rare earth; T = Ni, Cu, Au) built up by intergrowth of m GdPt2Sn and n SrPtSb slabs. Lattice parameters of the isotypic phases were obtained by X-ray powder diffraction analysis. The R3Au8Sn5 compounds crystallize with the previously determined Pr3Au8Sn5 structure, isopointal with the Ce3Pd6Sb5 type, and their lattice parameters derived from powder data are also given. The first principles electronic structure calculations, at 0 K, show increased enthalpy of formation across the lanthanide series in R3Au8Sn5 compounds caused by the decreased integrated density of states at the Fermi level. The systematic increase of the enthalpy of formation across the lanthanide series is the main reason why experimentally R3Au8Sn5 compounds do not form with heavy lanthanides. (C) 2014 Elsevier Ltd. All rights reserved.

DOI10.1016/j.intermet.2014.05.001
Custom 1

Extraordinary Responsive