Subsolidus phase relations in Na2O-CuO-Sb2On system and crystal structure of new sodium copper antimonate Na3Cu2SbO6
authors Smirnova, OA; Nalbandyan, VB; Petrenko, AA; Avdeev, M
nationality International
journal JOURNAL OF SOLID STATE CHEMISTRY
author keywords antimonate sodium copper antimony oxide; phase relations; X-ray diffraction; rietveld refinement; Jahn-Teller effect; alpha-NaFeO2; type; superstructure; pseudosymmetry
keywords MAGNETIC-STRUCTURE; CONDUCTIVITY; REFINEMENT; CHEMISTRY; LI2SNO3; LI5REO6; LI2MNO3
abstract Subsolidus phase relation studies in the NaSb3O7-Na3SbO4-CuO-CuSb2O6 quadrangle of Na2O-CuO-Sb2On system at 1123-1173 K revealed the formation of one new compound Na3Cu2SbO6. It is a superstructure derived from alpha-NaFeO2 type, space group C2/m, lattice constants: a = 5.6759(1) angstrom, b = 8.8659(1) angstrom, c = 5.8379(1) angstrom, beta = 113.289(1)degrees. All ions are in octahedral environment, but CuO6 polyhedron exhibits strong elongation due to Jahn-Teller effect (Cu-O: 2.000(2) angstrom x 2, 2.021(2) angstrom x 2, 2.494(3) angstrom x 2), whereas SbO6 octahedron is almost regular. The relationship to other similar superlattices is discussed. (c) 2005 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0022-4596
year published 2005
volume 178
issue 4
beginning page 1165
ending page 1170
digital object identifier (doi) 10.1016/j.jsse.2005.02.002
web of science category Chemistry, Inorganic & Nuclear; Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000229567100028
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