Electron spin resonance of CrO4 3− in fluoroapatite Ca5(PO4)3F
- 15 January 1977
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 66 (2) , 559-562
- https://doi.org/10.1063/1.433976
Abstract
Electron spin resonance spectra measured in CrO4 3− doped fluoroapatite Ca5(PO4)3F single crystals at liquid helium temperature show the presence of three magnetically nonequivalent chromate (V) tetrahedra indicating that hexagonal (P63/m) fluoroapatite similar to chloro- and hydroxyapatite undergoes a phase transition at low temperature to a phase of lower symmetry. Spin-Hamiltonian parameters determined by an analysis of the electron spin resonance spectra are presented. The ground state of the unpaired d1 electron is found to be dz2.Keywords
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