The influence of NO3−, CH3COO−, and Cl− ions and the morphology of calcium hydroxyapatite crystals

Stepuk, A.A.; Veresov, A.G.; Putlyaev, V.I.; Tret’yakov, Y.D.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 ноября 2016 г.

Авторы: Stepuk A.A., Veresov A.G., Putlyaev V.I., Tret’yakov Y.D.
Журнал: Doklady Physical Chemistry
Том: 412
Номер: 1
Год издания: 2007
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 11
Последняя страница: 14
DOI: 10.1134/S0012501607010046
Аннотация: In this work, calcium nitrate, chloride, and acetate were used as calcium-containing salts. These salts were chosen because of their high solubility in water (for example, = 42.8 20 g/100 g H 2 O, = 43.6 20 g/100 g H 2 O). The nitrate anion can be considered to be a nonmodifying ion because it does not enter the HA structure and is not subject to hydrolysis. The acetate ion, vice versa, is involved in ionic equilibria: it hydrolyzes, decreases the medium acidity, and interacts with a calcium ion to form an ion associate (ion pair) CH 3 COOCa + ( = 1.18, where K is the ion pair formation constant). It is unclear whether the acetate ion can enter the apatite structure. It is only known that the acetate ion promotes the formation of octacalcium phosphate (whose structure can, under certain conditions, include dicarboxylic acids) at 40 ° C in a neutral solution. The chloride ion is considered to be a modifying one because it can be substituted for the HA hydroxyl ions to form Ca 10 (PO 4 ) 6 (OH,Cl).
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