Buckled crystalline structure of mixed ionic salts
- 22 November 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 71 (21), 3485-3488
- https://doi.org/10.1103/physrevlett.71.3485
Abstract
X-ray absorption fine structure (XAFS) measurements of mixed salts Br and 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 7–9°. 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 Å in interatom bond distances. A computer simulation based on the information from XAFS and diffraction displays the actual structure of the salts.
Keywords
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