Crystal structure of loparite

被引：0

作者：

N. V. Zubkova

A. V. Arakcheeva

D. Yu. Pushcharovskii

E. I. Semenov

D. Atencio

机构：

[1] Moscow State University,Baikov Institute of Metallurgy and Materials Technology

[2] Russian Academy of Sciences,Mineralogical Museum

[3] Russian Academy of Sciences,Institute of Geoscience

[4] University of São Paulo,undefined

[5] Caixa Postal,undefined

来源：

Crystallography Reports | 2000年 / 45卷

关键词：

Radiation; Reflection; Crystal Structure; Perovskite; Diffraction Analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The crystal structure of the cubic modification of the natural mineral loparite has been studied for the first time by the methods of the X-ray diffraction analysis (γMoKα radiation, 105 independent reflections with I > 3σ(I), R = 0.041 in the anisotropic approximation). The structure belongs to the perovskite type (ABO3) with the double period of the cubic unit cell, a = 7.767(1) Å (sp. gr. Pn3m; Z = 2 for the composition (Ca,Na,Ce)(Na,Ce)3(Ti,Nb)2Ti2O12. Period doubling is explained by ordering of cations both in the A and the B positions.

引用

页码：210 / 214

页数：4

共 13 条

[1]

Chakhmouradian A.(1997)undefined Eur. J. Mineral. 9 483-undefined

[2]

Yakovemchuk V.(1894)undefined Fennia 11 1-undefined

[3]

Mitchell R.(1983)undefined Contrib. Mineral. Petrol. 84 365-undefined

[4]

Ramsay W.(1989)undefined Kristallografiya 34 592-undefined

[5]

Hackman V.(1977)undefined J. Appl. Crystalogr. 10 73-undefined

[6]

Haggerty S. E.(1997)undefined Am. Mineral. 82 475-undefined

[7]

Mariano A. N.(undefined)undefined undefined undefined undefined-undefined

[8]

Andrianov V. I.(undefined)undefined undefined undefined undefined-undefined

[9]

Yvon K.(undefined)undefined undefined undefined undefined-undefined

[10]

Jeitschko W.(undefined)undefined undefined undefined undefined-undefined

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