The accurate content determination of effective components is the key for the detection of pyrophyllite during its exploitation process.For a pyrophyllite powder sample with unknown content,the determination methods include X-ray diffraction(XRD),simultaneous thermal analysis(STA)and chemical composition analysis.Firstly,the phase analysis of original sample was conducted using X-ray diffractometer.The preliminary results showed that the sample was mainly composed of three minerals,i.e.,quartz(SiO_2),dickit...