**Appendix A**


**Table A1.** Initial compositions of the sample used in the high temperature experiments.


**Table A2.** Experimental Results in the System CaO-MgO-Al2O<sup>3</sup> -SiO<sup>2</sup> system with Al2O3/SiO<sup>2</sup> weight ratio of 0.4.






\* Experimental data from previous work [15–18,23].


**Table A3.** Experimental Results in the System CaO-MgO-Al2O<sup>3</sup> -SiO<sup>2</sup> system with Al2O3/SiO<sup>2</sup> weight ratio of 0.4.






\* Experimental data from previous work [15–18,23].
