127I NQR and spectroscopic investigation of impurity-doped and mixed lithium iodate Li1−xHxIO3 crystals
作者:A. Barabash、T. Gavrilko、K. Eshimov、J. Baran、H. Ratajczak
DOI:10.1016/j.molstruc.2004.03.005
日期:2004.12
The I-127 NQR, IR absorption and Raman spectra of impurity-doped and mixed lithium iodate Li1-xHxIO3 crystals grown from water solutions with different LiIO3/HIO3 ratios were investigated depending on the content of the impurity hydrogen x. The NQR results suggested that, at small concentration of doping iodic acid x < 0.22, the lattice dynamics of the crystal grown from water solution changes significantly though the crystal retains hexagonal symmetry. Spectroscopic studies are compatible with average hexagonal symmetry of the grown doped crystals. From the results of Raman studies at room temperature and 100 K, the concentration range of hydrogen dopant 0.22 < x < 0.36 was found where disordered solid solution crystals Li1-xHxIO3 are formed. (C) 2004 Elsevier B.V. All rights reserved.