Abstract
The solubility of Ce 2Ti 2O 7 in Ln 2Ti 2O 7 (LnGd, Er and Lu) was determined experimentally. It was found that the solubility increases as the ionic radius of the host lanthanide element decreases. The lattice parameters of Ce 2O 3.4TiO 2 have been measured. The solubility of TiO 2−m in Ce 2O 3.3TiO 2−m ( m≈0.11) was determined and the resulting solutions were investigated; the results indicate that an additional 2.5 TiO 2− m can be dissolved without significantly changing the lattice parameters. Limits for the solubility of Ce 4+ in compounds such as Ce 2O 3. nTiO 2 in which n=2 or 4 were also estimated.
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