Quasicrystals were long thought to be impossible because they violated the "rules" of what arrangements atoms can have in a solid. Scientists believed that crystals could only have two, three, four or sixfold symmetry, but nothing else.
But they have since found many more types of symmetry are possible
These images show different types of symmetries that can be found in quasicrystals: 5-fold (top left), 7-fold (top right), 11-fold (bottom left) and 17-fold (bottom right).
red trinitite sample that came from remnants of the world's first nuclear test in 1945, which contained the quasicrystal.
https://www.cbc.ca/radio/quirks/may...d-the-first-human-made-quasicrystal-1.6035016
But they have since found many more types of symmetry are possible
These images show different types of symmetries that can be found in quasicrystals: 5-fold (top left), 7-fold (top right), 11-fold (bottom left) and 17-fold (bottom right).
red trinitite sample that came from remnants of the world's first nuclear test in 1945, which contained the quasicrystal.
https://www.cbc.ca/radio/quirks/may...d-the-first-human-made-quasicrystal-1.6035016