Rhombohedral-cubic transition in Li0.2Na0.3La0.5TiO3 perovskite
作者： Alejandro Varez , Maria T. Fernandez-Díaz , Jesus Sanz
DOI: 10.1016/J.JSSC.2004.06.037
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摘要: Abstract High-temperature behavior of the fast ionic conductor Li0.2Na0.3La0.5TiO3 has been investigated by neutron powder diffraction between 300 and 1073 K. The Rietveld analysis patterns showed around 1000 K a change from rhombohedral ( R 3 ¯ c ) to cubic Pm m symmetry. During heating, tilting octahedra along [111] direction perovskite decreased rhombic distortion oxygen square windows that relates contiguous A-sites was eliminated. influence octahedral on Li mobility is finally discussed.
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