Abstract
Bragg neutron diffraction studies have been carried out on the crystalline solid solution system KBrxCl1-x for three different compositions, x=0.2, 0.4 and 0.8, and also for one of the end members, KCl single crystal. All the samples investigated were single-crystal samples, grown by melt method. The results in the case of crystalline solid solutions indicate enhancement of isotropic individual thermal parameters with a maximum corresponding to intermediate composition. The distortion factors (B') due to size effect for three different compositions were estimated following a method utilised for disordered binary alloys by Coyle and Gale (1955). These experimentally determined distortion factors for different compositions are compared with theoretical calculated factors based on two different models and the results are discussed. The variation of size effect factor or distortion factor with composition for this system is found to follow a parabolic trend.
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