Abstract
The crystallographic analysis of five compositionally similar structures shows that the \(R\overline 3 \)-symmetrical trigonal structure and two monoclinic (C2/c) structures with the ratio M:S = 3:2 that is the same for all three have identical cation sublattices and similar real configurations of atomic positions. Two structures with M:S = 9:8, with the orthorhombic symmetry (Pcan) and with its monoclinic distortion (P21/c), have identical cation sublattices. In the first group of the structures the symmetry and pseudosymmetry are determined by the SO4 template symmetry, namely, axis 3. In the second group the symmetry of cation frameworks and structures in general is partially formed by three mutually perpendicular axes \(\overline 4 \) of the SO4 tetrahedra.
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Russian Text © The Author(s), 2019, published in Zhurnal Strukturnoi Khimii, 2019, Vol. 60, No. 4, pp. 629–635.
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Borisov, S.V., Pervukhina, N.V. & Magarill, S.A. Crystallographic Analysis of the Genesis of the Structure Symmetry of Acid Sulfates M3H(SO4)2 (M = K, NH4). J Struct Chem 60, 602–608 (2019). https://doi.org/10.1134/S0022476619040103
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DOI: https://doi.org/10.1134/S0022476619040103