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Atomic Scattering Factor


X-rays are scattered by the electrons of an atom. Because the diameter of electron clouds is similar to the wavelength of x-rays, the amount of scattering varies with angle. The amplitude of x-ray radiation scattered by a single atom is defined by the atomic scattering factor (ASF). Its angular dependence is summzrized in a 9-coefficient polynomial equation.

Values for the ASF coefficients may be found in the International Tables for Crystallography, or in: Doyle & Turner (1968) Acta Crystallographica A24:390-397.


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