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Ternary Transition Metal Antimonides T 5 T ' 1‐x Sb 2+x ( T = Ti, Zr, Hf; T ' = Fe, Co, Ni, Cu, Ru, Rh, Pd, Cd) with Nb 5 SiSn 2 (Ordered W 5 Si 3 , Filled V 4 SiSb 2 ) Type Structure
Author(s) -
Kaiser Joachim W.,
Jeitschko Wolfgang
Publication year - 2002
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200202)628:2<337::aid-zaac337>3.0.co;2-2
Subject(s) - ternary operation , diffractometer , tetragonal crystal system , crystal structure , crystallography , transition metal , materials science , metal , arc melting , chemistry , metallurgy , catalysis , microstructure , biochemistry , computer science , programming language
Fifteen new ternary antimonides T 5 T ' 1‐x Sb 2+x were synthesized by reaction of the elemental components in an arc‐melting furnace. They crystallize with a tetragonal structure first reported for Nb 5 SiSn 2 (space group I 4/ mcm , Z = 4.) A structure refinement from four‐circle X‐ray diffractometer data of Hf 5 Fe 1‐x Sb 2+x ( a = 1086.0(1) pm, c = 550.1(1) pm, R = 0.033 for 270 structure factors and 18 variable parameters) showed deviations from the ideal occupancy for two atomic sites, resulting in the composition Hf 4.929(3) Fe 0.67(1) Sb 2.33(1) . Structure refinements from X‐ray powder data resulted in the formula Ti 5 Ni 0.45(2) Sb 2.55(2) , while no deviation from the ideal composition was observed for Ti 5 RhSb 2 . The crystal structures of these compounds are discussed together with those of related binary and ternary compounds.