ELECTRONIC STRUCTURE AND PROPERTIES OF APATITE-LIKE CALCIUM-BASED COMPOUNDS, INITIATED BY NANODIMEMSION, BIOGENIC FACTOR AND ISOMORPHIC SUBSTITUTION OF CALCIUM BY 3D-METALLS

Calcium apatites due to their physicochemical properties, high biological activity deservedly attract special attention not only in view of purely scientific interest, but also in connection with the use of drugs synthesized on their basis. in practical traumatology. dentistry, i.e. in those areas of medicine that are relevant to the treatment and restoration of bone tissue. As a rule, the basic elements are samples of nanometric dimensions. Electronic properties, features of chemical bond, structural parameters demonstrate high sensitivity to size reduction. In this paper, the nature of chemical bond, redistribution of electron density in energy and real space, isomorphically substituted hydroxyapatites based on calcium are studied with the complex application of such methods as photoelectron and X-ray spectroscopy, nuclear magnetic resonance, atomic force spectroscopy.