Published June 6, 2000
| Version v1
Journal article
Subsolidus phase equilibria of in the La2O3-V2O5-Nb2O5-Ta2O5 system
- 1. Russian Acad. of Sci., Ekaterinburg (Russian Federation). Inst. of Solid State Chem.
Description
X-ray phase analysis has been used to examine the phase composition of the La2O3-V2O5-Nb2O5-Ta2O5 system in the subsolidus region up to 1200 C. It was found that solid solutions including the M-fergusonite and weberite structures, as well as a limited series of LaTaO4-based solid solutions, are formed in the ternary La2O3-Nb2O5-Ta2O5 system. Solid solutions based on the LaNb2VO9 and LaTa2VO9 compounds have been detected in the La2O3-V2O5-Nb2O5-Ta2O5 system. These solid solutions have been examined by IR and radio spectroscopy. The number of defects in the vanadium sublattice is found to depend on the composition and sintering conditions. Elementary tetrahedrons have been found in the La2O3-V2O5-Nb2O5-Ta2O5 system. (orig.)
Additional details
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 305
- Journal Issue
- 1-2
- Journal Page Range
- p. 58-62
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Switzerland
- INIS RN
- 31033332
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRYSTAL STRUCTURE; ELECTRON SPIN RESONANCE; INFRARED SPECTRA; LANTHANUM OXIDES; LATTICE PARAMETERS; NIOBIUM OXIDES; PHASE DIAGRAMS; POWDERS; SOLID SOLUTIONS; STOICHIOMETRY; TANTALUM OXIDES; VANADIUM OXIDES; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DIAGRAMS; DIFFRACTION; DISPERSIONS; INFORMATION; LANTHANUM COMPOUNDS; MAGNETIC RESONANCE; MIXTURES; NIOBIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; RESONANCE; SCATTERING; SOLUTIONS; SPECTRA; TANTALUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS
Optional Information
- Notes
- 11 refs.