Abstract
The quadratic Zeeman effect of the Pr3+ ion in PrF3 and a Raman spectroscopic investigation of the optical phonons in LaF3 have been used to test the crystal structures proposed in the past for tysonite. We find that the twinned\(D_{3d}^4 (P\bar 3c1)\) structure is consistent with all available experimental results. A crystal field Hamiltonian parametrized in monoclinic symmetry was used to describe the observed crystal field splittings of Pr3+ in PrF3. Our best parameter set gave a r.m.s.-deviation of 12 cm−1. As a test for the eigenfunctions the quadratic Zeeman shifts are calculated and compared with the experimental results.
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Dahl, M., Schaack, G. Tysonite structure and crystal-field analysis of the Pr3+ ion in PrF3 . Z. Physik B - Condensed Matter 56, 279–288 (1984). https://doi.org/10.1007/BF01306635
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DOI: https://doi.org/10.1007/BF01306635