Figure 4.16. A contour plot similar to Figure 4.15 but for Ag15. Contour lines are 0.05eV apart and hash marks are directed downhill. The 7 additional electrons added to the 8 electrons of the closed shell reduce the symmetry of the system. There are three distorted symmetry axes that correspond to permutations of the 3 ellipsoidal axes and are related through volume conservation: R03=RxRyRz. The point (0,0) near the center of the figure is a local maximum. There are at least 3 unique local minima on this surface marked with labels 1-3.