Abstract
The structure of Cu2 − x Fe1 − x SnS4, the last member of the isomorphous series Cu3FeS4-Cu2FeSnS4, was synthesized for the first time and solved by the Rietveld method (the WYRIET 3.3 version). The compound occurs as a cubic phase (a 0 = 5.4179(5) Å) crystallizing in the sp. gr. \(P\bar 43m\). One-half of the tetrahedral cavities in the close packing of sulfur atoms [4e (xxx), x = 0.2583(5)] are statistically filled with metal atoms (Sn + Fe) and (Cu + Fe + Sn) [1a(0 0 0) and 3c (0 1/2 1/2), respectively]. The results of X-ray study (R p = 2.33, R wp = 3.00, s = 1.20, D = 1.53, R B = 2.52, and R F = 2.00) confirm the existence of the stannite “prototype” with a “small” cubic unit cell.
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Translated from Kristallografiya, Vol. 46, No. 3, 2001, pp. 418–422.
Original Russian Text Copyright © 2001 by Evstigneeva, Kabalov.
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Evstigneeva, T.L., Kabalov, Y.K. Crystal structure of the cubic modification of Cu2FeSnS4 . Crystallogr. Rep. 46, 368–372 (2001). https://doi.org/10.1134/1.1376461
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DOI: https://doi.org/10.1134/1.1376461