Abstract
The superhyperfine structure of the EPR spectra of in Mg is interpreted with simple molecular-orbital theory. A necessary preliminary analysis is made of the tensor and of the spacing of the six Kramers doublets derived from the ground manifold. The ligand-field parameters of the rhombic field, and , and the spin-orbit coupling, , are significantly different from values derived from less complete data. The reported superhyperfine interactions provide sufficient data to determine, without recourse to much less certain orbital-reduction factors, the -, sigma-, and pi-bonding fractions: , , and for the two equivalent fluorine ions along [110]. For the other four fluorine ions similar estimates are obtained. These results are at variance with the suggestion, made for octahedral , that sigma and pi bonding are of comparable magnitude.
- Received 25 October 1965
DOI:https://doi.org/10.1103/PhysRev.146.253
©1966 American Physical Society