Crystal field effect on the optical properties of Mn2+ ions in luminophors based on CaF2 and CaAlF5

A.V.Shamshurin, N.P.Efryushina, E.A.Zhikhareva

A.Bogatsky Physiko-Chemical Institute, National Academy of Sciences of Ukraine, 86 Lustdorfskaya Doroga, 65080 Odesa, Ukraine

Received June 1, 1999

Individual bands of Mn2+ ion in the excitation spectra of CaF2:Mn and CaAlF5:Mn have been identified and the crystal-field parameters of these materials have been calculated. Decrease of B and increase of Dq parameters for CaAlF5 are associated with the increase of the covalence degree of the Mn2+-F bond.

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