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Title: Hydrothermal synthesis of hydrous vanadium oxide bronzes M{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba)

Abstract

Hydrous vanadium (IV, V) oxides containing K or Rb were synthesized by the hydrothermal method from VOSO{sub 4}-M{sub 2}SO{sub 4} (M = K, Rb) solutions. they were found to be isomorphous with previously reported Ba{sub 0.4}V{sub 3}O{sub 8}(VO){sub 0.4}{center_dot}nH{sub 2}O, whose structure consists of V{sub 3}O{sub 8} layers which are bridged by V-O units (denoted by (VO){sub 0.4} in the formula) forming a tunnel-like opening to accommodate hydrous Ba ions. The isomorphous compounds can be formulated by J{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba; n = 0.6--0.7) where x and y show similar values of less than 0.5 as is accounted for by the crystal structure. The formation of this phase seems to be governed by the size of M cation whose ionic radius should lie in a limited range of 1.35 to 1.52 {angstrom}. The V{sub 3}O{sub 8}(VO){sub y} framework structure of a bronze-like type is compared with the V{sub 2}O{sub 5} framework of {beta}-M{sub x}V{sub 2}O{sub 5} ({beta} bronze) and the V{sub 3}O{sub 8} framework of H{sub 2}V{sub 3}O{sub 8}.

Authors:
; ; ;  [1]
  1. Kyoto Univ. (Japan)
Publication Date:
OSTI Identifier:
455226
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 32; Journal Issue: 1; Other Information: PBD: Jan 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHEMICAL PREPARATION; CRYSTAL STRUCTURE; VANADIUM OXIDES; POTASSIUM OXIDES; RUBIDIUM OXIDES; BARIUM OXIDES; HYDROTHERMAL SYNTHESIS; HYDRATES; SULFATES; EXPERIMENTAL DATA

Citation Formats

Oka, Yoshio, Yao, Takeshi, Yamamoto, Naoichi, and Tamada, Osamu. Hydrothermal synthesis of hydrous vanadium oxide bronzes M{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba). United States: N. p., 1997. Web. doi:10.1016/S0025-5408(96)00168-7.
Oka, Yoshio, Yao, Takeshi, Yamamoto, Naoichi, & Tamada, Osamu. Hydrothermal synthesis of hydrous vanadium oxide bronzes M{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba). United States. doi:10.1016/S0025-5408(96)00168-7.
Oka, Yoshio, Yao, Takeshi, Yamamoto, Naoichi, and Tamada, Osamu. Wed . "Hydrothermal synthesis of hydrous vanadium oxide bronzes M{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba)". United States. doi:10.1016/S0025-5408(96)00168-7.
@article{osti_455226,
title = {Hydrothermal synthesis of hydrous vanadium oxide bronzes M{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba)},
author = {Oka, Yoshio and Yao, Takeshi and Yamamoto, Naoichi and Tamada, Osamu},
abstractNote = {Hydrous vanadium (IV, V) oxides containing K or Rb were synthesized by the hydrothermal method from VOSO{sub 4}-M{sub 2}SO{sub 4} (M = K, Rb) solutions. they were found to be isomorphous with previously reported Ba{sub 0.4}V{sub 3}O{sub 8}(VO){sub 0.4}{center_dot}nH{sub 2}O, whose structure consists of V{sub 3}O{sub 8} layers which are bridged by V-O units (denoted by (VO){sub 0.4} in the formula) forming a tunnel-like opening to accommodate hydrous Ba ions. The isomorphous compounds can be formulated by J{sub x}V{sub 3}O{sub 8}(VO){sub y}{center_dot}nH{sub 2}O (M = K, Rb, Ba; n = 0.6--0.7) where x and y show similar values of less than 0.5 as is accounted for by the crystal structure. The formation of this phase seems to be governed by the size of M cation whose ionic radius should lie in a limited range of 1.35 to 1.52 {angstrom}. The V{sub 3}O{sub 8}(VO){sub y} framework structure of a bronze-like type is compared with the V{sub 2}O{sub 5} framework of {beta}-M{sub x}V{sub 2}O{sub 5} ({beta} bronze) and the V{sub 3}O{sub 8} framework of H{sub 2}V{sub 3}O{sub 8}.},
doi = {10.1016/S0025-5408(96)00168-7},
journal = {Materials Research Bulletin},
number = 1,
volume = 32,
place = {United States},
year = {1997},
month = {1}
}