Abstract
The crystal structure of a new borophosphate CsAl2BP6O20 obtained by spontaneous crystallization in a multicomponent Cs–Cu–B–P–O system is determined by X-ray diffraction (a = 11.815(2), b = 10.042(2), and c = 26.630(4) Å; space group Pbca, Z = 8, V = 3159.5(10) Å3; R 1 = 0.043). A new type of borophosphate anionic 2D radical characterized by the lowest B: P = 1: 6 ratio and containing P3O10 phosphate groups is found in the compound. A mixed-type anionic framework consisting of vertex-sharing BO4 and PO4 tetrahedra and AlO6 octahedra is distinguished in the structure. Large cesium atoms are located in the channels of the framework. Topological relationships are revealed between the structures of the CsAl3(P3O10)2 and CsAl2BP6O20 phases having different cationic compositions. These compounds can be considered quasi-polytypic phases.
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Original Russian Text © L.V. Shvanskaya, O.V. Yakubovich, V.I. Belik, 2016, published in Kristallografiya, 2016, Vol. 61, No. 5, pp. 764–773.
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Shvanskaya, L.V., Yakubovich, O.V. & Belik, V.I. New type of borophosphate anionic radical in the crystal structure of CsAl2BP6O20 . Crystallogr. Rep. 61, 786–795 (2016). https://doi.org/10.1134/S1063774516050205
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DOI: https://doi.org/10.1134/S1063774516050205