Experimental Study on X-Ray Scattering Factors of Calcium Fluoride

The structure factors of calcium fluoride were determind by measuring the integrated X-ray intensities of reflections from powder samples at room temperature. The structure factors measured on a relative scale were brought to the absolute values by the use of the experimental scale factor assuming Freeman's theoretical value of the atomic scattering factor of Ca ++ . It was concluded that the systematic deviation of experimental values of the atomic scattering factor for Ca, f Ca , from the theoretical ones as previously found by Weiss, Witte and Wölfel (z. phys. Chem. 10 (1957) 98, Rev. mod. Phys. 30 (1958) 51) does not exist. The experimental atomic scattering factors of F atom was proved to agree with those calculated by Boys or by Freeman rather than Berghuis et al 's one.