Bridging the Salt-Inclusion and Open-Framework Structures: The Case of Acentric Ag 4 B 4 O 7 X 2 (X = Br, I) Borate Halides.

Autor:	Volkov SN; Grebenshchikov Institute of Silicate Chemistry, St. Petersburg 199053, Russia., Charkin DO; Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia., Arsent'ev MY; Grebenshchikov Institute of Silicate Chemistry, St. Petersburg 199053, Russia., Povolotskiy AV; Institute of Chemistry, St. Petersburg State University, St. Petersburg 198504, Russia., Stefanovich SY; Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia., Ugolkov VL; Grebenshchikov Institute of Silicate Chemistry, St. Petersburg 199053, Russia., Krzhizhanovskaya MG; Department of Crystallography, St. Petersburg State University, St. Petersburg 199034, Russia., Shilovskikh VV; Geomodel Centre, St. Petersburg State University, St. Petersburg 198504, Russia.; ITMO University, St. Petersburg 191002, Russia., Bubnova RS; Grebenshchikov Institute of Silicate Chemistry, St. Petersburg 199053, Russia.
Jazyk:	angličtina
Zdroj:	Inorganic chemistry [Inorg Chem] 2020 Mar 02; Vol. 59 (5), pp. 2655-2658. Date of Electronic Publication: 2020 Feb 12.
DOI:	10.1021/acs.inorgchem.0c00306
Abstrakt:	An acentric borate family, Ag 4 B 4 O 7 X 2 (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 (Ag 2 X) + 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.
Databáze:	MEDLINE
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