The recent interpretation of the three intense near-infrared bands of Fe2+ in silicate garnets by White and Moore (1972) is re-examined using a point charge model. The inclusion of second nearest neighbor silicon atoms in the calculation leads to substantial modification of the level assignments. The bands at 4500, 6100, and 7800 cm−1 are now assigned to transitions from the dz2(A) orbital ground state to dxy(B1), dzx(B2) and, dyz(B3)orbitals respectively. The present assignments are also consistent with the selection rule requirement that the dz2(A) → dx2-y2(A) transition is forbidden.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.