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## A. Binary Mixtures of MRJ Superdisks 

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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 

