STRUCTURE OF LA2NIO4.18

被引：51

作者：

MEHTA, A ^{[1
]}

HEANEY, PJ ^{[1
]}

机构：

[1] PRINCETON UNIV,DEPT GEOL & GEOPHYS SCI,PRINCETON,NJ 08544

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.49.563

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The published structure of La2NiO4+y has unusually short (1.94 angstrom) Ni-O bond lengths. We reexamined the structure of La2NiO4.18 using monochromatic synchrotron x-ray radiation. Rietveld refinement of the structure in space group Bbcm yielded Fourier synthesis (F(obs)) maps that suggest a modified structural model for La2NiO4.18. The refined structure contains chemically more reasonable interatomic distances (e.g., shortest Ni-O distance of 2.00 angstrom). A comparison of this structure with that of the superconductor La2CuO4+y reveals disparities in the conduction planes of the two materials that may explain differences in electrical behavior.

引用

页码：563 / 571

页数：9

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