Figure 4.10. Equilibrium phase diagram for the system NaAlSi3O8-CaMgSi2O6-CaAl2Si2O8 at 0.1 MPa pressure. Temperature is in degrees Celcius and composition is in weight percent. Drag the temperature slider on the right to show equlibrium phase assemblages at various temperatures. Click on the "Coordinates" button to see the compositions of points in the diagram as the mouse is moved over the diagram. Click on the "Show Phases" button to see the equilibrium phase assemblages for specific bulk compositions given by the mouse position as the mouse is moved over the diagram. Click on the diagram to hold a particular bulk composition. Note that most bulk compositions can have 1-phase, 2-phase, or 3-phase equilibrium assemblages, depending on the temperature. To see how the phase assemblage changes for the selected bulk composition (shown by a white circle), click on the "Change T" button and use the temperature slider. To cancel the selected bulk composition, click on the "Animate" button.
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