ORGANIC RADICALS IN NATURAL APATITES ACCORDING TO EPR DATA: POTENTIAL GENETIC AND PALEOCLIMATIC INDICATORS
L. G. Gilinskaya
Keywords: organic radicals, vanadyl ion complexes, EPR spectra, natural marine apatites, paleoclimate
Pages: 491-500
Abstract
In a group of natural marine apatites Ca5(PO4)3(F, OH), organic H3, H2-R, HOHR, (CH3)2-R, and radicals are identified by EPR. The relation between the EPR spectra of the observed organic radicals, the valence form, and the structural location of impurity vanadium ions (V4+ (VO2+) on the Ca2+ II site or V5+ (VO4)3- → (PO4)3-) is established. The structure of organic radicals correlates with the type of organic matter in the sample under analysis: sapropelic or humic, depending on the climatic conditions of mineral genesis
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