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Updated: Apr 6, 2026
Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
K3LaTe2O9: a new alkali-rare earth tellurate with face-sharing TeO6 octahedra
Xinyuan Zhang1, Jiyong Yao, Xingxing Jiang
1Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. gczhang@mail.ipc.ac.cn.
Abstract:
A new quaternary alkali-lanthanide metal tellurate K3LaTe2O9 has been synthesized by a conventional high-temperature solid state method, and single crystals have been grown by spontaneous crystallization. K3LaTe2O9 crystallizes in the hexagonal space group P63/mmc, with a = b = 6.0589(9) Å, c = 15.024(3) Å, and Z = 2. In the structure, [Te2O9](6-) contains rare face-sharing TeO6 polyhedra, which are connected by LaO6 octahedra forming a three-dimensional framework structure. Furthermore, its properties are investigated by UV-vis-NIR diffuse reflectance spectroscopy, Raman and IR spectroscopy, thermal analysis, variable-temperature X-ray powder diffraction, and first-principles calculations.
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