Qualitative Phase Analysis
Pp. 42-52 (11)
IDENTIFICATION OF PHASES
The qualitative identification of phase depends, ultimately, upon the measurement of the precise locations and
intensities of the diffraction lines. Interplanar spacings corresponding to the diffracted X-rays are to be found first,
and then intensities are measured either by a diffractometer, which can give excellent results, when the Ni- or singlecrystal
monochromator is used as the filter.
Principle of Superposition of X-Ray Patterns
It is well-known that X-rays diffracted by incoherent planes are according to the principle of superposition of
intensities. The same principle is followed by X-ray patterns produced from different crystalline substances.
Considering a system consisting of two phases denoted by capital letters, and let the same notation represent their
fingerprints as peaks, then....