Abstract
The absorption spectrum of synthetic (Mg0.9Ni0.1)2SiO4 has been determined at room temperature in the energy range 5000-50,00O cm-1. The observed absorption bands are assigned to crystal field transitions of Ni2+ in the two nonequivalSSent cation sites of olivine. On the basis of the two-site assignment, the calculated values of the spectral parameters Dq and B are:
| . | Dq . | B . |
|---|---|---|
| M1 | 870 cm−1 | 900 cm−1 |
| M1 | 768 cm−1 | 882 cm−1 |
| . | Dq . | B . |
|---|---|---|
| M1 | 870 cm−1 | 900 cm−1 |
| M1 | 768 cm−1 | 882 cm−1 |
The d-orbital energy levels of Ni2+ in the distorted cation polyhedra have been calculated using the point charge method of Wood and Strens (1972). Good agreement between calculated and observed positions of the non-degenerate 3A2 → 3T2, transitions result.
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