The Cluster Variation Method (CVM) in the Tetrahedron-Octahedron approximation is used to calculate the short range order diffuse intensity distribution for binary ordered alloys. The results are compared to those derived by the Krivoglaz-Clapp-Moss (KCM) formula for various stoichiometric concentrations and temperatures. The CVM produces sharper diffuse intensity spectra than does the KCM formula, and better conserves the constancy of the integrated intensity. Use of the CVM further insures that the calculated short-range order intensity is consistent with derived phase diagrams and instability temperatures.
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