COHERENCE-ASSEMBLY IN STRUCTURES WITH CLUSTERS OF HEAVY CATIONS
S. V. Borisov, S. A. Magarill, N. V. Pervukhina
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: coherence-assembly, crystallographic analysis, cluster groupings, cation sublattice, polyanions with W and Mo
Abstract
Crystallographic analysis is used to investigate the mutual packing arrangements of cluster groupings in the structures of KNa23O4(H2O)48[{Rh4O2(H2O)2}(H2W9O33)2] (I), (NH4)2[H3Mo57V6(NO)6O183(H2O)18]·53H2O (II), and Na6Sr2[W12O40(OH)2]·24H2O (III). It is found that all heavy cations in the clusters are located near the nodes of the single sublattice of the crystal. This arrangement ensures the coherence-assembly of the structural fragments since both the mutual orientation of the fragments and intervals between them are defined by the single cation sublattice.
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