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  • 1 Canmet, Energy, Mines and Resources Canada Mineral Sciences Laboratories K1A OG1 Ottawa Ontario Canada
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The reaction between SiO2 and MgO at temperatures up to 1500°C was studied using thermal analysis, with X-ray diffraction being used to identify reaction products. The reaction is slow and results in the formation of Mg2SiO4 and MgSiO3, with minor amounts of SiO2·nH2O and residual amounts of unreacted SiO2 and MgO. Complete reaction of the starting materials to form Mg2SiO4 can only be achieved by maintaining the mixture at 1500°C for extended periods of time (>1 h).