Structural changes during the hydrolysis of dicalcium phosphate dihydrate to octacalcium phosphate and hydroxyapatiteстатья

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Дата последнего поиска статьи во внешних источниках: 26 августа 2016 г.

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[1] Structural changes during the hydrolysis of dicalcium phosphate dihydrate to octacalcium phosphate and hydroxyapatite / V. F. Shamrai, A. E. Karpikhin, A. Y. Fedotov et al. // Inorganic Materials. — 2015. — Vol. 51, no. 4. — P. 355–361. Powders prepared through dicalcium phosphate dihydrate (DCPD) hydrolysis to octacalcium phosphate (OCP) and hydroxyapatite (HA) in an aqueous sodium acetate solution have been characterized by X-ray diffraction. The lattice parameters of the synthesized OCP and HA phases have been determined as functions of holding time at synthesis temperatures of 37 and 60A degrees C. The structure of the HA obtained through hydrolysis at 60A degrees C has been refined, and the distortion of the elements of the crystal lattice of this compound has been assessed in terms of Baur indices. A model has been proposed for the heterogeneous nucleation and growth of the OCP phase on DCPD crystals, in which the structure of these compounds is represented as made up of groups similar in structure to Posner regions. [ DOI ]

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