Search academic texts

Information × Registration Number 0304U004025, 0103U303373 , R & D reports Title Conjugated heterovalent substitutions of trivalent elements for alkaliearths in compounds having an apatite structure. popup.stage_title Ізоморфне заміщення М2+ на Ві3+ та Y3+ в гідроксиапатиті Са, Sr, Ba. Робота над базою даних ізоморфних заміщень. Head Getman Evgenij Ivanovich, Registration Date 01-03-2004 Organization Donetsk National University popup.description2 By X-ray diffraction method establishes width of homogeneous area in systems Ca5-2xYxMIx (PO4) 3 (where MI- Li, Na, K), Sr5-2xYxMIx (PO4)3OH, Ca5-2xBixMIx (PO4)3OH and Ca5-xMIIIx (PO4)3OH1-xOx (where MIII - Y, Bi). XR-structural analysis (by Rit-veld's method) establishes position of yttrium atoms in apatite struc-ture. On the basis of the analysis of phase structure of the investigated systems, change of parameters of elementary cells, results XR-structural analysis and also of cristal-chemical accounts is shown, that in systems MII5-2xMIxMIIIx (PO4)3OH areas of solid solutions are formed: homogeneous and heterogeneous area of substitution under the circuit 2М2+ > М3+ + М+ and heterogeneous area of substitution under the circuit М2+ + ОН?> М3+ + О2-. Product Description popup.authors popup.nrat_date 2020-04-02 Close