The zero-field splittings b(2)(o) of the tetragonal Gd3+-V-M and Gd3+-Li+ centers for Gd3+ ions in fluoroperovskite crystals have been studied on the basis of the superposition model in which the value of t(2) (b) over bar(2) is Obtained from the stress-dependence of EPR spectra for RbCaF3:Gd3+ crystal. From the studies, the local structures of both tetragonal centers in fluoroperovskite crystals are obtained and the results are discussed.
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