SEARCH Articles Figures Tables Alkali halide crystals hardnesses Covalent crystals hardness Crystal faces, varying hardnesses Crystallization hard condensed matter Crystallization hard segment Cubic crystals Knoop hardness Free hard crystal Hard sphere crystallization Hard spheres crystalization Hard-sphere crystal Hardness of crystals Hexagonal crystals hardness anisotropy Industrial crystallization, hardness Industrial crystallization, hardness salts Relationship between crystal hardness and melting temperature The Hard-Sphere Fluid-Crystal Transition