The special quasi-random structures model was invented to simulate these systems as periodic supercells. In 2004, Cantor and Yeh simultaneously proposed increasing the complexity of these systems to stabilize their topologically-close-packed sigma and Laves phases. Larry Kaufman invented CALPHAD to predict these systems’ phase diagrams. A class of these materials is named for the high configurational (15[1])entropy (15[3])afforded by (15[1])five equimolar (15[1])atoms. (15[1])(*) Quasicrystals were discovered in one of these materials. Like polymers, these materials exhibit superelasticity and a shape memory effect caused by microstructure twinning. Atoms in these materials must match valence, electronegativity, and radii to ensure all their electrons are delocalized throughout a solid (10[1])solution. For 10 points, (-5[1])name these mixtures of metals. ■END■ (10[2])