Shechtman 1984 (Nobel 2011) Al-Mn icosahedral diffraction with 5-fold symmetry; Penrose-tile aperiodic order; long-range order without translational periodicity; redefines crystal definition.
Shechtman 1984 (Nobel 2011) Al-Mn icosahedral diffraction with 5-fold symmetry; Penrose-tile aperiodic order; long-range order without translational periodicity; redefines crystal definition.