Abstract

A new stable icosahedral quasicrystal has been found in annealed Cd-Mg-Dy alloys. The composition of the icosahedral phase was determined to be approximately Cd66Mg21Dy13. Powder X-ray and electron diffraction patterns revealed that the phase has a primitive icosahedral lattice with a quasilattice parameter aR = 0.5634 nm. The electron diffraction study confirmed that the phase has a well ordered primitive icosahedral structure.

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