(a) p = 0 . 85 (b) p = 1 . 5 FIG. 3: (color online). Typical configurations of MRJ packings of binary superdisks with different values of the deform ation parameter p . The chords show one of the symmetry axes of the superdisks. FIG. 4: The density of MRJ packings of binary superdisks as a function of p . Insert: the average contact number Z as a function of p . 1 1.5 2 2.5 3 p 0.84 0.86 0.88 0.9 0.92 1 1.5 2 2.5 3 p 4 4.2 4.4 4.6 4.8 Z A. Binary Mixtures of MRJ Superdisks In two dimensions, we study MRJ packings of a specific family of binary superdisk mix- tures in which the size ratio is κ = 1 . 4 and the molar ratio is β = 1 / 3. The size ratio κ is defined as the ratio of the diameter of large superdisks over that of the small superdisks; and the molar ratio β is defined as the number large superdisks over the number of small 8