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How regular is regular ? Statistical assessments of binary metallic solutions

The regular solution model originally proposed by Hidebrand (J Am. Chem. Soc., 1929, (51), 66) for expressing the thermodynamic properties of homogeneous solutions has become a popular formalism for assessment of the experimental results in a variety of systems, both organic and inorganic. While som...

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Bibliographic Details
Published in:Calphad 1990-10, Vol.14 (4), p.363-366
Main Author: Schlesinger, M.E.
Format: Article
Language:English
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Summary:The regular solution model originally proposed by Hidebrand (J Am. Chem. Soc., 1929, (51), 66) for expressing the thermodynamic properties of homogeneous solutions has become a popular formalism for assessment of the experimental results in a variety of systems, both organic and inorganic. While some doubt exists as to whether the behaviour of any metallic solution strictly fits this model, several different binary systems are listed in various metallurgical texts as good examples of a "regular" solution, often without any statement of the criteria by which the judgement was made. In this paper, an attempt is made to assess the "regularity" of these solutions through a statistical analysis of reported experimental data for Cd--Zn, using both the original model and the quasiregular and subregular solution models which have been derived from it. The purpose of this assessment is to develop suggested criteria which might be used to separate regular from non-regular solutions. 22 ref.--AA
ISSN:0364-5916
1873-2984
DOI:10.1016/0364-5916(90)90003-I