Effect of phase transformations during synthesis on the chemical composition and structure of calcium-deficient hydroxyapatite

Autor:	O. A. Sycheva, Yu. G. Zonov, N. V. Kitikova, A. I. Rat’ko, I. L. Shashkova
Rok vydání:	2007
Předmět:	Aqueous solution Chemistry Precipitation (chemistry) General Chemical Engineering Potentiometric titration Inorganic chemistry Metals and Alloys Protonation Phosphate Inorganic Chemistry Ammonia chemistry.chemical_compound Phase (matter) Materials Chemistry Chemical composition
Zdroj:	Inorganic Materials. 43:1119-1127
ISSN:	1608-3172 0020-1685
DOI:	10.1134/s0020168507100160
Popis:	The chemical and phase changes during the precipitation of calcium-deficient hydroxyapatite from a solution of natural chalk in a mixture of phosphoric and nitric acids, with the use of aqueous ammonia as the precipitant, have been studied by potentiometric titration and physicochemical analysis. The initial solution concentration and precipitation time are shown to have a significant effect on the composition and structure of the precipitate. The processes in the solution and precipitate are interpreted in terms of thedegree of protonation of phosphate ions under various conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::58bd6358c7fd3b5e8c126670e0732db4 https://doi.org/10.1134/s0020168507100160 Zobrazit plný text záznamu Plný text ve formátu PDF