The main constituents of Indian non-coking coal are silicates and quartz. When both silicates and quartz are present in a sample only X-ray diffraction can be used for the quantitative determination of these mineral phases. A method has been developed to determine the alpha-quartz content in the different size fractions of Talcher run of mines coal. It has been found from X-ray fluorescence analysis of silica and alumina that a linear relationship exists in Talcher coal just like other coal samples of non-Indian origin. The relationship has been found to follow the equation: (SiO2)total = (SiO2)quartz + p(Al2O3) where p = 1.69.
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