Quantitative determination of lattice fluoride effects on the solubility and crystallinity of carbonated apatites with incorporated fluoride.
Quantitative determination of lattice fluoride effects on the solubility and crystallinity of carbonated apatites with incorporated fluoride.
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DOI：
10.1159/000345080
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发表时间：
2013
期刊：
影响因子：
4.2
通讯作者：
Higuchi WI
中科院分区：
文献类型：
--
作者：
Yan G;Moribe K;Otsuka M;Papangkorn K;Higuchi WI
采用亚稳平衡溶解度（MES）分布法，研究了氟化物对碳酸化磷灰石（CAPs）溶解度和结晶度的影响。合成了两种不同碳酸盐含量（3%和5%）的氟掺杂CAP（F-CAP），氟含量为0 ~ 20，000 μg/g。通过X射线衍射实验和Rietveld分析获得了微晶的微观应变和晶胞参数。在两种溶液氟化物浓度（0.2mg/L和2.0mg/L）和两种pH（5.0和5.7）下制备乙酸盐缓冲液MES溶液培养基。发现F-CAP的晶胞a轴值随着氟化物含量的增加而降低;与氟化物被并入晶格中一致。MES溶液介质中的氟化物浓度足够高以提供“淹没”效应，使得在溶解期间从F-CAP释放的氟化物在改变溶液氟化物浓度方面最小。采用MES分布叠加法，结果表明，具有氟磷灰石（FAP）的化学计量（Ca 10（PO 4）6 F2）的表面复合物占MES分布行为的所有实验。此外，平均pIFAP [根据MES溶出介质的FAP化学计量比（其中溶解了50%的F-CAP）的离子活性积计算的-log（aca 10 PO 46 aF 2）值]与F-CAP的微晶微应变参数相关性良好。在F-CAP中掺入的氟化物对F-CAP结晶度和溶解度仅显示出适度的影响。
The purpose of this study was to evaluate quantitatively the effects of fluoride on the solubility and crystallinity of carbonated apatites (CAPs) after its incorporation into the crystal lattice using the metastable equilibrium solubility (MES) distribution method. Fluoride incorporated CAPs (F-CAPs) of two different carbonate levels (3% and 5%) and fluoride contents from 0 to 20,000 μg/g were synthesized. X-ray diffraction experiments and Rietveld analysis were conducted to obtain crystallite microstrain and unit cell parameters. Acetate buffer MES solution media were prepared at two solution fluoride concentrations (0.2 mg/L and 2.0 mg/L) and at two pHs (5.0 and 5.7). The unit cell a-axis values of the F-CAPs were found to decrease as the fluoride content increased; consistent with the fluoride being incorporated into the crystal lattice. The fluoride concentrations in the MES solution media were high enough to provide a “swamping” effect such that the fluoride released from the F-CAPs during dissolution was minimal in changing the solution fluoride concentration. Employing the MES distribution superposition method, it was shown that the surface complex possessing the fluorapatite (FAP) stoichiometry (Ca10(PO4)6F2) accounted for the MES distribution behavior of all experiments. In addition, the mean pIFAP [the value of −log(aca 10PO46aF2) calculated from ionic activity product based on FAP stoichiometry of the MES dissolution media in which 50% of the F-CAP had dissolved] correlated well with the crystallite microstrain parameters of the F-CAPs. The incorporated fluoride in the F-CAPs showed only modest effects on F-CAP crystallinity and solubility.
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影响因子：
7.4
作者：
GEE, A;DOMINGUES, LP;DEITZ, VR
通讯作者：
DEITZ, VR
影响因子：
3.3
作者：
Dean, H. Trendley;Arnold, Francis A., Jr.;Short, Edwin M.
通讯作者：
Short, Edwin M.
影响因子：
7.6
作者：
MARGOLIS, HC;MORENO, EC;MURPHY, BJ
通讯作者：
MURPHY, BJ
影响因子：
4.2
作者：
DRIESSENS, FC
通讯作者：
DRIESSENS, FC
DOI：
10.1002/bbpc.19790830609
发表时间：
1979-01-01
期刊：
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS
影响因子：
--
作者：
DRIESSENS, FCM
通讯作者：
DRIESSENS, FCM