Search for Helices of Atomic Electron Density As a Structural Basis of Optical Activity in α-TeO2 Crystal

An X-ray diffraction study of the atomic structure of paratellurite (α-TeO 2 ) crystal in the temperature range of 86–500 K has been performed. Regions of atomic electron density, shaped as helices with axes oriented parallel and perpendicular to the optical axis, are selected; these regions are fou...

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Bibliographic Details
Published inCrystallography reports Vol. 64; no. 6; pp. 937 - 941
Main Authors Dudka, A. P., Golovina, T. G., Konstantinova, A. F.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2019
Springer Nature B.V
Subjects
Atomic structure
Crystal structure
Crystallography and Scattering Methods
Electron density
Helices
Optical activity
Optical properties
Optical rotation
Physical Properties of Crystals
Physics
Physics and Astronomy
Tellurium dioxide
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Summary:An X-ray diffraction study of the atomic structure of paratellurite (α-TeO 2 ) crystal in the temperature range of 86–500 K has been performed. Regions of atomic electron density, shaped as helices with axes oriented parallel and perpendicular to the optical axis, are selected; these regions are found to be the structural basis of the optical activity of crystal. All helices turned out to be right-handed. The values of optical rotation in the directions parallel and perpendicular to the optical axis have been calculated using structural data. These values have identical signs, as was suggested proceeding from the identical twist of electron density helices.
ISSN:1063-7745
1562-689X
DOI:10.1134/S106377451906004X