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Optical and Chiro-optical Properties of Crystals with Sillenite Structure.

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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]
Copyright of Crystallography Reports is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Optical and Chiro-optical Properties of Crystals with Sillenite Structure.
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  Data: 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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  Data: <i>Copyright of Crystallography Reports is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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