A misunderstood member of the nagelschmidtite family unveiled:: structure of Ca5Na2(PO4)4 from X-ray powder diffraction data

被引：15

作者：

Celotti, G ^{[1
]}

Landi, E ^{[1
]}

机构：

[1] CNR, IRTEC, I-48018 Faenza, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2003年 / 23卷 / 06期

关键词：

apatite; biomedical applications; powders-chemical preparation; powder structure determination; X-ray methods;

D O I：

10.1016/S0955-2219(02)00211-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

During the development of procedures to synthesize carbonate hydroxyapatite with properties resembling those of biological material, a new phase was found to form after high temperature treatments in the presence of sodium. The compound was isolated and analytically characterized, leading to its identification as Ca5Na2(PO4)(4): an analogous Ca-Na phosphate was previously described, but with rather poor diffraction data and uncertain stoichiometry. Accurate XRD powder patterns revealed a hexagonal cell, space group P6(3)mc (186), a = 10.64 Angstrom, c = 21.71 Angstrom, Z = 6, rho = 2.93 g/cm(3), with the a axis double and the c axis triple those of the subcell typical of alpha-phases in the well-known system A(2)XO(4) (or ABXO(4)). The complete structural determination was carried out and the relevant aspects and properties discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：851 / 858

页数：8

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