The 19F NMR of a single crystal of [formula omitted] ErF3 has been investigated at 8 and 16 MHz. Weak NMR lines were observed whose shifts relative to the main CdF2 peak were found to be field dependent. These shifts showed axial symmetry about the  crystallographic directions with [formula omitted] and [formula omitted]. The small NMR lines are attributed to those lattice fluorides which have one nearest neighbor Er3+ occupying a normal Cd2+ site. The anisotropic portion of the shift is shown to be due to the dipolar contribution of spin on the erbium ion with no unpaired spin in the fluorine p orbitals. Analysis of intensity ratios supports a random distribution of Er3+ among Cd2+ sites with no preferential formation of clusters.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry