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Derivation of the conditions for equivalent positions in crystals: The dissymmetrization of barite by electron spin resonance spectra

Authors :
A. O. Krivtsov
V. M. Vinokurov
N. M. Nizamutdinov
G. S. Morozov
R. A. Khasanov
N. M. Khasanova
Source :
Crystallography Reports. 57:751-757
Publication Year :
2012
Publisher :
Pleiades Publishing Ltd, 2012.

Abstract

The conditions for equivalent positions on the (hkl) face of growing crystal are derived using symmetry elements of the space group. It is shown by the example of the sp. gr. D2h16 that the conditions of equivalent position formation coincide with conditions of the reflection of diffracted beams by crystal. It is established that electron spin resonance (ESR) centers in barite, SO4− (I) and SO4− (II), with only two conjugate spectra with equal intensity out of four, and SO4− (III), with a different intensity of conjugate spectra KαM = 2, are localized into the growth pyramid of the (001) face with a [010] step. SO2−, SO3−,, and SO4− (IV) centers, having an identical intensity of the conjugate ESR spectra with KαM = 2, are localized into the growth pyramid of the (210) face with a growth step [001].

Details

ISSN :
1562689X and 10637745
Volume :
57
Database :
OpenAIRE
Journal :
Crystallography Reports
Accession number :
edsair.doi...........7a314958b3fbdbf97e05bceac862683b
Full Text :
https://doi.org/10.1134/s1063774512050070