Di-Fo-An Ternary Diagram in 3D. Perspective views of the ternary Diopside(Di)-Forsterite(Fo)-Anorthite(An) composition vs. T phase diagram liquidus surface. Move the slider to switch from the 2D contour diagram of the liquidus surface to a 3D model with the Di liquidus surface (yellow), the Fo liquidus surface (green), and the An liquidus surface (blue). Two-dimensional Di-An vs. T and An-Fo vs. T diagrams are shown as side cross sections of the 3D diagram.