Fe₂₃B₆ -type quasicrystal-like structures without icosahedral atomic arrangement in an Fe-based metallic glass

We have found nanoscale quasicrystal-like structural states exhibiting pseudotenfold nanobeam electron-diffraction patterns in the course of nanocrystallization process of an Fe₂₃B₆ structure in an (Fe_0.5Co_0.5)₇₂B₂₀Si ₄Nb₄ metallic glass. An existence of the intermediate states between the quasicrystal-like and Fe₂₃B₆ structures indicates that the quasicrystal-like structure is approximate to the Fe ₂₃B₆ structure including no icosahedral atomic arrangement. The pseudotenfold electron-diffraction patterns are understood from a combination of three types of tiles found in the Fe₂₃B₆ structure. The three types of tiles can produce decagonal units which do not have any icosahedral atomic arrangement.