Topotactic lithium exchange in the precursor catalyst VOHPO[sub 4][center dot]0. 5H[sub 2]O: The crystal structure of LiVOPO[sub 4][center dot]0. 5 H[sub 2]O
Journal Article
·
· Journal of Solid State Chemistry; (United States)
- Universidad de Malaga (Spain)
The synthesis and properties of a new lithium vanadyl(IV) phosphate, LiVOPO[sub 4][center dot]0.5H[sub 2]O, are reported. The synthesis was carried out by a lithium exchange reaction in VO(HPO[sub 4])[center dot]0.5H[sub 2]O with LiOH at low temperature in a nonaqueous medium. The crystal structure of LiVOPO[sub 4][center dot]0.5H[sub 2]O (space group P[sub 2[sub 1]2[sub 1]2], a = 7.4651(6) [Angstrom], b = 9.4167(8) [Angstrom], c = 6.0762(6) [Angstrom], Z = 4) was refined by the Rietveld method from laboratory X-ray powder diffraction data, giving R[sub wp] = 8.0% and R[sub F] = 6.5%. The structure is made up of layers made of VO[sub 6] dimers which are linked by phosphate groups. The framework of the starting material is maintained but the vanadium coordination sphere is more distorted and the lithium position is deduced from a difference Fourier map. The structural, thermal, and spectroscopic features are compared to those of the closely related H-derivative. 27 refs., 8 figs., 3 tabs.
- OSTI ID:
- 6239162
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 103:2; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
FOURIER TRANSFORMATION
GRAVIMETRIC ANALYSIS
HYDRATES
INTEGRAL TRANSFORMATIONS
LATTICE PARAMETERS
LAYERS
LITHIUM COMPOUNDS
LITHIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PRECURSOR
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
X-RAY DIFFRACTION
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
FOURIER TRANSFORMATION
GRAVIMETRIC ANALYSIS
HYDRATES
INTEGRAL TRANSFORMATIONS
LATTICE PARAMETERS
LAYERS
LITHIUM COMPOUNDS
LITHIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PRECURSOR
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
X-RAY DIFFRACTION