RIETVELD STRUCTURAL REFINEMENT OF "A" TYPE PHOSPHOSTRONTIUM CARBONATE HYDROXYAPATITES

被引:4
作者
Jebri, Sonia [1 ]
Boughzala, Habib [2 ]
Bechrifa, Ali [1 ]
Jemal, Mohamed [1 ]
机构
[1] Tunis El Manar Univ, Fac Sci, Dept Chem, Appl Thermodynam Lab, Tunis El Manar 2092, Tunisia
[2] Tunis El Manar Univ, Fac Sci, Dept Chem, Lab Crystallochem & Mat, Tunis El Manar 2092, Tunisia
关键词
Carbonate hydroxyapatites; Infrared spectroscopy; Rietveld refinement; crystallographic study; CERAMICS; APATITES; DIFFRACTION; STRONTIUM; CATIONS;
D O I
10.1017/S0885715613000870
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Phosphostrontium carbonate hydroxyapatites having the general formula Sr-10(PO4)(6)(OH)((2-2x))(CO3)(x) were prepared by solid gas reaction at different temperatures in the range 0 <= x <= 1. Infrared spectroscopy investigation reveals a carbonate groups substituting hydroxyl ions. Intensity bands increasing with the carbonate amount introduced in the lattice, while the one corresponding to hydroxyl decreases until disappearance. The Rietveld refinement of the structural model using X-ray powder diffraction patterns is used to determine the substitution rate. It was quantified by the refinement of the occupancy sites affected by the substitution. The crystallographic study shows the evolution of the atomic coordinate in the apatite due to the carbonate incorporation. The variation of the main interatomic distances and the bond angles was also discussed.
引用
收藏
页码:S409 / S424
页数:16
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