Structural refinements of strontium substituted hydroxylapatites
Structural refinements of strontium substituted hydroxylapatites
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DOI：
10.4028/www.scientific.net/msf.278-281.814
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发表时间：
1998-01-01
期刊：
影响因子：
--
通讯作者：
Tedesco, E
中科院分区：
文献类型：
--
作者：
Bigi, A;Falini, G;Tedesco, E
用X射线粉末衍射谱拟合研究了不同Sr取代度（5，20，60%Sr）的羟基磷灰石的晶体结构。的锶含量，从细化得到的，是在协议的化学分析数据表明，Rietveld细化是一个powerfull方法，以定量估计夹杂物的外来离子时，取代的程度确定了显着变化的整体散射功率。金属原子的精细占据因子表明，随着Sr摩尔分数的增加，Sr对六重M（2）位的选择性增加。未观察到OH基团位置的变化。
The crystal structures of hydroxylapatites synthesized at different degree of strontium substitution for calcium (5, 20 and 60% Sr atoms) have been investigated by X-ray powder-pattern fitting. The strontium content, as obtained from the refinements, is in agreement with the chemical analysis data indicating that Rietveld refinement is a powerfull method in order to estimate quantitatively the inclusion of a foreign ion when the extent of the substitution determines a significant variation of the overall scattering power. The re fined occupancy factors of metal atoms show that the strontium preference for the sixfold M(2) site increases toghether with strontium molar fraction. No variation in the OH group position is observed.