X-ray study of the cation distribution in the ternary oxide, 6 Bi{sub 2}O{sub 3}-V{sub 2}O{sub 5}

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1996.0127· OSTI ID:269887

Kashida, S; Hori, T ^[1]

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1. Niigati Univ. (Japan)

The structure of the ternary oxide 6 Bi{sub 2}O{sub 3}-V{sub 2}O{sub 5} has been investigated using single crystal X-ray diffraction data. It has a fluorite-type superstructure with a pseudo monoclinic cell, a = 20.023 {Angstrom}, b = 11.668 {Angstrom}, c = 20.472 {Angstrom}, and {Beta} = 107.13{degrees}, (the relation to the fluorite subcell is a {approx_equal} 3/2[1,1,2]{sub c}, b {approx_equal} 3/2 [1,1,0]{sub c}, and c {approx_equal} 1/2 [5,5,2]{sub c}), but the real crystal symmetry is P1. The positions of metal atoms are refined to R = 0.12. The structure is characterized by six cation layers along the c axis, each containing 18 metal atoms. The cation arrangement can be represented using the numbers of V atoms as 4-0-4-4-0-4. Along the b axis, the crystal has square wave type displacements ({approx_equal}0.6 {Angstrom}). The origin of this large distortion is attributed to the Coulomb repulsion between V atoms in the nearest neighbor sites.

• OSTI ID: 269887
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 122; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CATIONS
CRYSTAL STRUCTURE
MONOCLINIC LATTICES
VANADIUM OXIDES
X-RAY DIFFRACTION