Structure redetermination and high pressure behaviour of AgCuO2

被引：28

作者：

Curda, J ^{[1
]}

Klein, W ^{[1
]}

Liu, H ^{[1
]}

Jansen, M ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 338卷 / 1-2期

关键词：

silver cuprate (III); crystal structure; neutron diffraction; synchrotron radiation; high pressure;

D O I：

10.1016/S0925-8388(02)00221-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

AgCuO2 has been obtained via a low temperature route. The structure has been redetermined with Rietveld refinements using neutron powder diffraction data [C2/m, a=6.0756(3), b=2.8088(1), c=5.8728(3) Angstrom, beta=107.987(4)degrees, Z=2, R-p=6.36%, R-wp=7.22%]. The crystal structure consists of chains of ladder-like CuO4-rectangles running along [010], interconnected by AgO2-dumbbells. For physical and crystal chemical reasons the oxidation states +I for silver, and +III for copper, respectively, have been assigned. High-pressure X-ray powder diffraction experiments have been made. AgCuO2 is stable with respect to decomposition and structural distortion up to 36.3 GPa. The zero pressure bulk modulus of AgCuO2 is estimated as 118.2 GPa. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：99 / 103

页数：5

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