BUCKLED CRYSTALLINE-STRUCTURE OF MIXED IONIC SALTS

被引：59

作者：

FRENKEL, A ^{[1
]}

STERN, EA ^{[1
]}

VORONEL, A ^{[1
]}

QIAN, M ^{[1
]}

NEWVILLE, M ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.71.3485

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray absorption fine structure (XAFS) measurements of mixed salts RbxK1-xBr and RbBryCl1-y at their congruent melting points compositions reveal that their actual structure buckles about the NaCl average structure with an rms angular deviation from collinearity of 7-degrees-9-degrees. XAFS measures the buckling directly through three-body correlations, and verifies the homogeneity and randomness of the mixtures. The characteristic ionic sizes are found to be dependent on concentration, causing changes to 0.1 angstrom in interatom bond distances. A computer simulation based on the information from XAFS and diffraction displays the actual structure of the salts.

引用

页码：3485 / 3488

页数：4

共 20 条

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