Structure determination of H sub 2 V sub 3 O sub 8 by powder X-ray diffraction

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90279-7· OSTI ID:6363544

Oka, Yoshio; Yao, Takeshi; Yamamoto, Naoichi ^[1]

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1. Kyoto Univ. (Japan)

A vanadium oxyhydroxide H{sub 2}V{sub 3}O{sub 8} with a green fibrous shape was hydrothermally synthesized; it was originally formulated as V{sub 3}O{sub 7}{center dot}H{sub 2}O. It has an orthorhombic symmetry: a = 16.9298(2), b = 9.3589(1), c = 3.64432(4) {angstrom}, and Z = 4. The structure analysis was performed by the Rietveld method using powder X-ray diffraction data. A structure model for the space group Pnam was found to be compatible with the X-ray data leading to R{sub p} = 0.059 and R{sub wp} = 0.063. The structure is described as a layer structure composed of V{sub 3}O{sub 8} layers which are made up with VO{sub 6} octahedra (V(1)O{sub 6} and V(2)O{sub 6}) and VO{sub 5} trigonal bipyramids (V(3)O{sub 5}), where V(3) was assigned to V{sup 5+} and V(2) was likely V{sup 4+}. The arrangement of VO polyhedra resembles to that in {beta}-Na{sub 0.33}V{sub 2}O{sub 5}.

• OSTI ID: 6363544
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 89:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MEASURING METHODS
NUMERICAL DATA
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
SCATTERING
SPACE GROUPS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM HYDROXIDES
X-RAY DIFFRACTION