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Figure 7.04. NaAlSi3O8-CaAl2Si2O8 equilibrium phase diagram. Phases at equilibrium are shown as a function of chemical composition (weight percent CaAl2Si2O8) and temperature. Click on the "Show Phase % button" and mouse over the diagram to see the equilibrium phases and their chemical compositions as temperature is changed. This diagram was drawn from data obtained in high temperature experiments by Bowen (1913) and revised by Morse (2015).