J. Appl. Cryst. (1993). 26, 549-554 [ doi:10.1107/S002188989201286X ]
Abstract: The refractive indices and the optical activity along and perpendicular to the optic axis have been determined in the room-temperature phase of KLiSO4. The values of all these quantities have been successfully connected with the crystal structure by using a classical point-dipole polarizability theory. This permits determination of the absolute optical chirality of the material, i.e. provides a link between the absolute configuration and the sign of the optical rotation. The polarizabilities of the different atoms have been determined. The conclusion is reached that the main contributors to the optical activity are the O atoms, in particular those occupying general positions.
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