Karmalyts'kyj V. Isomorphous replacements of calcium and strontium on alkaline elements and Y (Bi) in structure of apatite

Object of research are the isomorphous replacements of atoms in crystals. The purpose of work - delimitation of isomorphous re-placements Ca and Sr on Y (Bi) in structure HAP both together with alkali metals, and without them. Such methods and instru-mentation utilised: XRD (DRON-2), X-ray crystal analysis of a powder (HZG-4a), IR-spectroscopy (SPECORD-75IR, Perkin-Elmer), chemical analysis, ААA (SATURN-3М). In work was es-tablished width of homogeneous area, character of dependence of parameters of a unit cell from composition of systems, position of atoms Y in structure of apatite, significant reduction of intensity of strips valent and libration of fluctuations OH- - groups in structure of apatite is established. On the basis of the analysis of the re-ceived data and crystal chemistry of accounts is shown three areas of solid solutions are formed, with different circuits. The elec-tronic database on isomorphous substitutions has been created (wwws.dongu.donetsk.ua/chempage/i-page/db/). The resultsof work can be utilised at creation of new materials and as a reference source.