Atomic Distributions and Electrical Resistivities of Liquid Gold-Tin Alloys

Abstract

The distributions ρij(r) of Au-Au, Sn-Sn and Au-Sn pairs have been calculated using the three partial interference functions Iij(K ) which were evaluated from the scattered x-ray intensities of liquid Au-Sn alloys measured by Kaplow, Strong and Averbach. The functions IAuAu (K) and ISnSn(K) and their corresponding Fourier transforms are similar to those observed in their respective pure liquids. The functions IAuSn ( K ) and ρAuSn(r) resemble closely a model structure based on a solid AuSn alloy with a NiAs-type structure. The electrical resistivities of the alloys obtained with Iij(K ) and the pseudo-potential elements Ui(K) show a large increase upon alloying Sn into Au in agreement with experimental observation.