Perovskites: Temperature and Coordination Dependent Ionic Radii
| Autor: | V. L. Miller, Steven C. Tidrow |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Ionic radius
Materials science Thermodynamics Condensed Matter Physics Thermal expansion Electronic Optical and Magnetic Materials Lattice constant Planar Volume (thermodynamics) Control and Systems Engineering Materials Chemistry Ceramics and Composites Electrical and Electronic Engineering Perovskite (structure) |
| Zdroj: | Integrated Ferroelectrics. 148:1-16 |
| ISSN: | 1607-8489 1058-4587 |
| Popis: | Materials LaAlO3 and A2+TiO3, where A is Ba, Ca, Pb and Sr, have been investigated in order to determine the “effective” temperature dependent ionic radii of 12-fold coordinated Ba2+, Ca2+, Pb2+, Sr2+ and La3+, and, 6-fold coordinated Al3+, Ti4+ and O2− within the “simple” “ideal” cubic Perovskite structure. The recently developed planar and volume constrained Perovskite model, which incorporates thermal expansion, has been utilized to determine ionic radii values. As compared with Goldschmidt based models, the newly determined radii provide significant improvements for more precise modeling of the lattice parameter of Perovskites at room temperature as well as over extended temperature ranges. |
| Databáze: | OpenAIRE |
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