2009 Volume 78 Issue 12 Pages 123601
We have observed the circular-polarization-dependent intensities of forbidden (0,0,6n±2) reflections at the Cu K absorption edge in the chiral crystal CsCuCl3. The intensities for the right- and left-handed circularly-polarized incident beams interchange in CsCuCl3 crystals with opposite chiralities. The result is well explained by a model calculation based on the anisotropic tensor susceptibility of Cu2+ ions, taking only the electric-dipole (E1) process into account. This technique can determine crystallographic chirality by measuring the flipping ratio for only one reflection, in principle.
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