Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
Effective Pair Potentials of Liquid CuBr Estimated from the Anomalous X-Ray Scattering Data
Kazuhiko OmoteMasatoshi SaitoYoshio Waseda
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1997 Volume 66 Issue 10 Pages 3097-3101


We have proposed a method for calculating the effective pair potentials of molten salt from measured structural data in which a long-range Coulombic interaction is important [K. Omote and Y. Waseda: J. Phys. Soc. Jpn. 66 (1997)]. By applying this method, the effective pair potentials of liquid CuBr have been successfully estimated from the experimental partial structure factors obtained by anomalous X-ray scattering. The resultant potentials show two characteristic features. One is remarkable shielding for the Cu--Cu Coulomb repulsion in its nearest neighbor region. This might be a possible origin for the absence of marked structure in the Cu--Cu correlation and the penetration of Cu ions into the first like-ion coordination shell. The other is the deviation from the Coulomb potential in the range of 0.4-- 0.9 ,nm in the interactions of Cu--Cu and Cu--Br pairs, suggesting a certain correlation to a pre-peak found in the Cu--Cu structure factor at about 10 ,nm-1.

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© The Physical Society of Japan 1997
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