1994•Journal of Materials ChemistryRequires access

Crystal structure of U 2 Pt 2 Sn: a new derivative of the tetragonal U 3 Si 2 -type structure

P. Gravereau, F. Mirambet, Bernard Chevalier, François Weill, L. Fournès, D. Laffargue, F. Bourée, J. Étourneau

Abstract

The crystal structure of the new ternary stannide U2Pt2Sn has been investigated by both X-ray powder diffraction and electron diffraction. It crystallizes in a tetragonal unit cell with a= 768.1(1) pm and c= 739.1(1) pm. This crystal structure is a new superstructure of the tetragonal U3Si2-type which appears on account of the existence of short Pt–Pt distances. The crystal structure of U2Pt2Sn is described taking into consideration those of UPt and UPt2Sn.

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Key concepts: Tetragonal crystal system, Crystal structure, Superstructure, Crystallography, Materials science, Diffraction, Ternary operation, Electron diffraction