
%0 Journal Article
%A Burley, SP 
%T The Allowed and Forbidden Transitions in the Paramagnetic Resonance of the Manganese Ion in Trigonal Sites in Apatite and Smithsonite
%J Australian Journal of Physics
%D 1964/12/01
%V 17
%N 4
%P 537-542
%K 
%R https://doi.org/10.1071/PH640537
%U https://www.publish.csiro.au/paper/PH640537 
%X The allowed and forbidden paramagnetic resonance transitions of MnH ions in single crystals of apatite [CalO(PO.). (F, CI)] and smithsonite [ZnCO.] have been investigated. The spin Hamiltonian parameters, describing the spectra observedat 300oK, were found from a third-order perturbation-theory estimate of the eigenvalues, calculated for the cases in which the magnetic field was parallel and perpendicular to the trigonal axis. Since in the case of apatite the D term was not very small compared with the Zeeman term, it had to be included also in the zeroth-order Hamiltonian. 
