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Iron Vanadates Synthesized from Hydrothermal Brines: Rb 2 FeV 6 O 16 , Cs 2 FeV 6 O 16 , and SrFe 3 V 18 O 38
Author(s) -
Smith Pellizzeri Tiffany M.,
McMillen Colin D.,
Wen Yimei,
Chumanov George,
Kolis Joseph W.
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900799
Subject(s) - vanadium , vanadate , chemistry , octahedron , hydrothermal circulation , alkali metal , hydrothermal synthesis , crystallography , raman spectroscopy , alkaline earth metal , inorganic chemistry , crystal structure , space group , manganese , oxidation state , spectroscopy , x ray crystallography , metal , diffraction , chemical engineering , physics , organic chemistry , optics , engineering , quantum mechanics
Three new alkali and alkaline earth iron vanadates have been synthesized via high‐temperature hydrothermal brines. Compound 1 , Rb 2 FeV 6 O 16 , is built from vanadium(IV/V) oxo layers with iron(III) tetrahedra embedded in them, crystallizing in space group Cc . Compound 2 , Cs 2 FeV 6 O 16 , has similar vanadium‐rich layers, but with a very different pattern to the layered structure in space group P 1 . The difference in alkali metal between 1 and 2 influences the polarity of the iron vanadate layers. Compound 3 , SrFe 3 V 18 O 38 , crystallizes in space group R 3 , with a complex three‐dimensional vanadate framework containing vanadium(IV) and vanadium(III/IV) octahedra. The framework is templated by Fe(III) tetrahedra and octahedra as well as Sr cuboctahedra. All compounds were characterized by single‐crystal X‐ray diffraction, Raman spectroscopy, and energy‐dispersive X‐ray spectroscopy (EDX). Broadly, this study demonstrates the structural variety that can be obtained by exploiting the sensitivity of vanadium's coordination and oxidation state in a novel hydrothermal halide environment.