Abstract:The multipolar character of transitions in lanthanide double nitrates is stressed, thereby demonstrating the effect of small deviations from an icosahedral symmetry on the fluorescence and absorption properties. Polarized absorption spectra of Nd3+ in Nd2Mg3(NO3)12⋅24H2O have been recorded between 11 600 and 28 900 cm−1 at 77 and at 4.2 K. Supplementary data were obtained by fluorescence measurements. The energy level scheme was obtained by diagonalizing a Hamiltonian describing the free ion parameters includi… Show more
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