A potential inversion study of liquid CuBr
J. Neuefeind
Abstract
Hard electromagnetic radiation diffraction experiments on copper(I)-bromide melt are presented. Combining the result of this experiment with earlier neutron diffraction experiments the partial pair distribution functions of CuBr have been determined. The differing results for two of these functions obtained recently by various techniques are discussed. A potential inversion scheme has been applied to generate three dimensional structures from the partial pair distribution function. The angular correlations between near neighbor atoms have been determined. These show characteristic differences with the glass-forming ZnCl2 melt. While in ZnCl2 melt the angle joining adjacent ZnCl4 tetrahedra has been found - as in silica glass - well defined and the +-+ (ZnClZn) angle distribution peaked the corresponding distribution function in CuBr is broad. This is probably a key to understand, why ZnCl2 but not CuBr melt can be easily supercooled into a glassy state.
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