Abstract
The crystal field energy levels, the magnetic susceptibilities and the g -values of Pr 2 Mg 3 (NO 3 ) 12 ·24H 2 O were calculated theoretically by means of diagonalisation of the matrix of spin-orbit (SO), electrostatic (ES) and the crystal field (CF) interaction considered together, the matrix being constructed in a basis of all states of Pr 3+ in the 4f 2 configuration. A C 3v site has been assumed. The crystal field levels that were obtained from the aforesaid diagonalisation were used to calculate the g -values and principal magnetic susceptibilities. The set of parameters giving the good fit to the three experiments (optical, EPR and susceptibility), has been evaluated.
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