Rietveld structure refinement of synthetic magnesium substituted beta-tricalcium phosphate

被引:32
作者
Bigi, A
Falini, G
Foresti, E
Ripamonti, A
Gazzano, M
Roveri, N
机构
[1] Università degli Studi, Dipartimento di Chimica “G. Ciamician”, 1-40126 Bologna
[2] Università degli Studi, Centro di Studio per la Fisica délie Macromolecole, C.N.R., c/o Dipartimento di Chimica “G. Ciamician”, 1-40126 Bologna
来源
ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1996年 / 211卷 / 01期
关键词
X-ray powder diffraction; crystal structure; Rietveld method; isomorphous substitution;
D O I
10.1524/zkri.1996.211.1.13
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Rietveld method has been applied to refine the structure of magnesium substituted beta-tricalcium phosphate at a magnesium content of about 14 mol%. The results of the refinements, which show a final agreement factor R(wp) = 0.12, are in agreement with an almost complete substitution in two of the five crystallographically independent cation sites. The preference of magnesium for these two sites can be explained on the basis of the coordination geometry of the five different cation sites. Furthermore the results allow to interpret the discontinuity found around 10 magnesium mol% in the variation of the c axis as a function of magnesium content.
引用
收藏
页码:13 / 16
页数:4
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