The pure doping samples of single phase are necessary to the common doping me-thods in quantitative X-ray diffraction phase analysis. In this paper, the new multiphase doping method in X-ray quantitative analysis is presented. If the analysis sample contains n phases, (n-1) suitable multiphase reference doping samples are required to determine the amounts of each phase in the analysis sample, but each doping sample would not contain more than (n-1) phases. This method can also be applied to determine only the amounts of several of the phases in the analysis sample. Practical quan-titative analysis have proved that, the new method is quite applicable and gives quite precise and satisfactory quantitative analysis results.
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