X-ray powder diffraction and solid-state NMR investigations in cadmium-lead hydroxyapatites

被引：0

作者：

Badraoui, B

Bigi, A ^{[1
]}

Debbabi, M

Gazzano, M

Roveri, N

Thouvenot, R

机构：

[1] Ecole Natl Ingn Monastir, Lab Chim Inorgan & Ind, Monastir 5019, Tunisia

[2] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy

[3] CNR, Ctr Studio Fis Macromol, I-40126 Bologna, Italy

[4] Univ Paris 06, Unite CNRS 7071, Lab Chim Inorgan & Mat Mol, F-75252 Paris 05, France

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2001年 / 05期

关键词：

hydroxyapatite; Rietveld method; P-31 MAS NMR spectroscopy; ionic substitution; X-ray diffraction;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In the proposed experiment, the maximum amount of cadmium substitution in lead hydroxyapatite accounts for about to 30 atom-%. The crystal structures of PbHA at different degrees of cadmium substitution for lead (4.9, 10.0, 22.4 and 29.0% Cd atoms) have been investigated by X-ray powder pattern fitting and P-31 MAS NMR. The site-occupancy factors of metal atoms clearly indicate a preference of cadmium for site 1 of the apatite structure, which is more selective at low cadmium content. A progressive shift of the OH group wards the center of the triangles formed by the site 2 metalshas been observed with increasing cadmium content. The different environments of the phosphate group demonstrated by P-31 NMR spectroscopic data are discussed in relation to structural data.

引用

页码：1261 / 1267

页数：7

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