Bibliographic Details
| Title: |
Optical and Chiro-optical Properties of Crystals with Sillenite Structure. |
| Authors: |
Burkov, V. I., Egorysheva, A. V., Kargin, Yu. F. |
| Source: |
Crystallography Reports. Mar2001, Vol. 46 Issue 2, p312. 24p. |
| Subjects: |
Crystal optics, Crystallography |
| Abstract: |
The experimental data on the optical and chiro-optical properties of crystals with the sillenite structure Bi[sub 12]M[sub x]O[sub 20 ± δ] (M = elements of II-VIII groups) have been reviewed. The relations between the changes in the chemical composition, the crystal structure of Bi[sub 12]M[sub x]O[sub 20 ± δ] compounds, absorption, circular dichroism, and optical rotation spectra of sillenites have been established. A model taking into account the contribution of the electronic transitions of optically active tetrahedral [MO[sub 4]][sup n-] complexes to the total optical rotation in sillenites is suggested. The data on the state (oxidation degree) and the recharging processes of 3d-elements in sillenites are systematized. The models of optical centers responsible for the photochromic effect in sillenites are critically analyzed. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
