sir
please give the clarification of XRD Quantitative Quartz & Free Silica in Limestone by ASTM Method both are same or different.
pls clarify my doubts
Regards
Nagu
Dilip Yadav
Free Silica and Quartz both are different
Free Silica is mainly SiO2 and it has a mixture of Amorphouse and Crystaline Silica, whereas Quartz has impurity of Iron / Manganese / Calcium with crystaline form of silica.
Free Silica can be determined by conventional methods but Quartz can be determined by microscopy or XRD only.
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