ON A DUAL FUNCTION OF ANIONS IN CRYSTALLOGENESIS OF COMPOUNDS:STRUCTURE-DIRECTING AND STABILIZING
V. V. Bakakin
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: катионные каркасы, темплаты, ортобораты, фторидобораты бария, фторидобораты свинца, антицеолиты, cation frameworks, templates, orthoborates, barium fluoride borates, lead fluoride borates, antizeolites
Abstract
The crystallogenesis of three groups of structures of fluoride-orthoborates (and their analogs) with large cations is studied from the point of view of the current cation-framework representations. Their cation frameworks are sterically templated by rigid borate anions and are built as antizeolite structures. Cavities of channel or layered types are filled with components different their composition and configuration with the main function as charge compensators. An example of different functionalities of the identical anions are Ba3(BO3)2 and La3Ca3(BO3)5 structures. In these structures, two (BO3) types generate a cation framework, and the third type stabilizes it in ready channels (!).
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