Abstract
Crystal structures of the minerals lillianite Pb3Bi2S6 and heyrovskyite Pb6Bi2S9 are subjected to crystallographic analysis to demonstrate that the microtwinning of the structure-forming 2D layer fragments occurs within common cation and anion matrices. A combination of the PbS-type structural fragments with different orientations is achieved by vacant sites in the cation and anion translational sublattices without their noticeable distortion. In the structure of β-Pb3Bi2S6 (the high-pressure phase of lillianite), the pseudo-translational ordering of cations and anions as well as the overall symmetry of the structure are significantly lowered, while the general arrangement is preserved.
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Original Russian Text Copyright © 2012 by S. V. Borisov, S. A. Magarill, N. V. Pervukhina
Devoted to the Jubilee of Academician F. A. Kuznetsov
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Translated from Zhurnal Strukturnoi Khimii, Vol. 53, No. 4, pp. 744–750, July–August, 2012.
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Borisov, S.V., Magarill, S.A. & Pervukhina, N.V. Crystallographic analysis of microtwin structures of sulfides: The case study of lillianite and heyrovskyite. J Struct Chem 53, 734–739 (2012). https://doi.org/10.1134/S0022476612040166
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DOI: https://doi.org/10.1134/S0022476612040166