Factors stabilizing the paramagnetic radicals CO2-, CO3-, and CO33- in natural carbonated apatites

Carbon radicals in natural magmatic, sedimentary, biological, and synthetic carbonated apatites are studied by ESR. The thermal and radiation behavior of the radicals is studied. The effect of composition on spectrum intensity and the ratio of radicals on their stabilization in a matrix are investigated; this made it possible to establish two positions and two forms of carbon as well as two variants of its location in the structure: in the form of CO32- on the PO43- site, in the form of CO2 on the surface, as a complex with structurally bound water and without it It is established that bound water in molecular form H2O affects the observed ESR spectra, the dynamic characteristics of carbonate radicals, and their quantitative relations.