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- Title
INFLUENCE OF Mg<sup>2+</sup> IONS DOPING ON THE STRUCTURE, MORPHOLOGY AND PHASE TRANSITION OF LiIO<sub>3</sub> CRYSTAL.
- Authors
DU, YINXIAO; SUN, YUPING; CHEN, W. C.; CHEN, X. L.; ZHU, L. N.
- Abstract
The influence of different concentrations of Mg2+ ions doping on the structure, morphology and phase transition of LiIO3 crystal was investigated. The best Mg2+-doped alpha-lithium iodate (Mg:α-LiIO3) crystals for potential optical applications can be successfully grown by the aqueous solution method when the concentration of Mg2+ ions in the initial mother solutions Cm< 0.001 M. Chemical component analysis shows the Mg:α-LiIO3 crystal is a new system with the segregation coefficient k>1. The polarized Raman results are consistent with our conclusions that the Mg2+ ion substitutes for the host Li+ cation in the pure α-LiIO3 crystals and results in the corresponding cation vacancies. As Cm increases, inclusions, spontaneously crystalline grains, β phase of LiIO3 and hillock-shape Mg:α-LiIO3 crystals are induced respectively by different concentrations of Mg2+ ions doping under the same crystal growth conditions. When Cm>0.1 M, the polarized Raman results indicate that larger amounts of Mg2+ ions incorporated inhibit LiIO3 growth and result in the hillock-shape morphology by destabilizing the crystal lattice and inducing lattice distortion.
- Subjects
CRYSTAL growth; IONS; PHASE transitions; CRYSTALLIZATION; CRYSTALLOGRAPHY; NUCLEATION
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2007, Vol 21, Issue 26, p4495
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979207037910