Optical rotation in RbTiOAsO4 (point group mm2)
-
W. Kaminsky
Abstract
Measurement of optical rotation in RbTiOAsO4 (RTA) with the tilter method resulted in an optical rotation of ρ12= +17(3)o/mm at a wavelength of 670nm, when a (100) sample was tilted about [001]. A tilt about [010] showed no rotation, as expected from the directional dependence of optical rotation calculated from the tensor in point group mm2. The absolute Miller-indices of the sam-les were found using X-ray anomalous scattering. The calculations with a dipole-dipole model show that the As5+-ions in RTA correlate with the main structural contribution of the optical rotation. However, there seems to be an even larger intrinsic contribution due to the Ti4+ – ions as a result of the distorted octahedral co-ordination with oxygen.
© 2002 Oldenbourg Wissenschaftsverlag GmbH
Artikel in diesem Heft
- Editorial
- Optical rotation in RbTiOAsO4 (point group mm2)
- Nitridocompounds of manganese: manganese nitrides and nitridomanganates
- Crystal structure of 12H+-2,4-benzo-1,5-dioxa-8,12,16-triaza-cyclooctadec-2-ene-7,17-dione picrate
- X-ray crystal structure analysis of lanthanide trihydrogeno hydroxy-1-ethanebis(phosphonate)-1,1,dihydrogeno hydroxy-1ethanebis(phosphonate)-1,1 hemiundecahydrate, Ln{[C(CH3)(OH)(P2O6H3)][C(CH3)(OH)(P2O6H2)]}⋅5.5H2O with Ln = Y, Ho, Er; and energy parametrization of the absorption spectrum of the Er compound
- The crystal structure of the decomposition product NH4HC2O4 from powder diffraction data
- Books Received
Artikel in diesem Heft
- Editorial
- Optical rotation in RbTiOAsO4 (point group mm2)
- Nitridocompounds of manganese: manganese nitrides and nitridomanganates
- Crystal structure of 12H+-2,4-benzo-1,5-dioxa-8,12,16-triaza-cyclooctadec-2-ene-7,17-dione picrate
- X-ray crystal structure analysis of lanthanide trihydrogeno hydroxy-1-ethanebis(phosphonate)-1,1,dihydrogeno hydroxy-1ethanebis(phosphonate)-1,1 hemiundecahydrate, Ln{[C(CH3)(OH)(P2O6H3)][C(CH3)(OH)(P2O6H2)]}⋅5.5H2O with Ln = Y, Ho, Er; and energy parametrization of the absorption spectrum of the Er compound
- The crystal structure of the decomposition product NH4HC2O4 from powder diffraction data
- Books Received
