For La1-xThxNbO4+ x 2, three phases with broad homogeneity regions occur, for 0.075 ≤ x ≤ 0.37, 0.41 < x < 0.61, and 0.65 ≤ x ≤ 0.74. All are related to the scheelite structure type, with at least the first exhibiting an incommensurate structural modulation. An analogous structurally modulated phase was found for LaNb1-xWxO4+ x 2 for 0.11 ≤ x ≤ 0.22. Additional phases occur at La0.2Th0.8NbO4.4 and LaNb0.4W0.6O4.3. The electrical conductivity and the direction and wavelength of the structural modulation have been characterized for the La1-xThxNbO4+ x 2 phase with 0.075 ≤ x ≤ 0.37.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry