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The expressions of the autocorrelation functions (CF) of the regulartetrahedron and the regular octahedron are reported. They have an algebraicform that involves the arctangent function and rational functions of r and (a +b r2)1/2, a and b being appropriate integers and r the distance. The CFexpressions make the numerical determination of the corresponding scatteringintensities fast and accurate also in presence of a size dispersion.

The correlation functions of the regular tetrahedron and octahedron