The effect of medium chemistry on the solubility and morphology of brushite crystals |
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| Authors: | M A Kuz’mina S V Zhuravlev O V Frank-Kamenetskaya |
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| Institution: | 1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia
2. TekhnoKomStroi OOO, Moskovskii pr. 143, lit. A, St. Petersburg, 196105, Russia
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| Abstract: | An experimental study of the particulars of the solubility and crystallization of brushite Ca(HPO4) · 2H2O from aqueous solution in conditions of a variable pH (6.0–3.0) and the contents of impurity ions (K+, Na+, NH 4 + , Mg2+, SO 4 2? , CO 3 2? ) has been conducted. It is established that brushite solubility markedly rises with a decrease in pH from 6 to 3 and slightly rises with an increase in Mg2+ and SO 4 2? concentrations. The enrichment in K+, Na+, and NH 4 + does not affect brushite solubility. The changeable chemistry of the medium results in variation of the synthetic crystal habit, from rhombic tabular to thickened prismatic crystals. |
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