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CHEMISTRY AND CHEMICAL ENGINEERING

CHEMISTRY AND CHEMICAL ENGINEERING

Abstract

X-ray studies have established that as a result of the thermal impact on the quartz-pyrophyllite rocks of the Boynxaksa deposit, the decomposition of the pyrophyllite phase begins at temperatures above 600 °C. The formation of the mullite phase is fixed at 1200 °C. The phase of cristobalite appears at 1300 oC and begins to prevail over the content of quartz at 1400 °C.

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