Bridging the Salt-Inclusion and Open-Framework Structures: The Case of Acentric Ag4B4O7X2 (X = Br, I) Borate Halides

Sergey N. Volkov, Dmitri O. Charkin, Maxim Yu Arsent'Ev, Alexey V. Povolotskiy, Sergey Yu Stefanovich, Valery L. Ugolkov, Maria G. Krzhizhanovskaya, Vladimir V. Shilovskikh, Rimma S. Bubnova

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

An acentric borate family, Ag4B4O7X2 (X = Br, I), has been prepared by slow cooling stoichiometric melts in evacuated silica ampules. Their crystal structure is comprised of two porous interpenetrating frameworks and demonstrates a further development of the "salt-inclusion" architecture toward a "covalent-inclusion" structure. The (Ag2X)+ sublattice shows strong anharmonic vibrations. Thermal expansion is strongly anisotropic because of the presence of condensed rigid kernite boron-oxygen chains aligned perpendicular to the c axes.

Original languageEnglish
Pages (from-to)2655-2658
Number of pages4
JournalInorganic Chemistry
Volume59
Issue number5
Early online date12 Feb 2020
DOIs
StatePublished - 2 Mar 2020

Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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