Atomic structures of ternary Yb–Cd–Mg icosahedral quasicrystals and a 1/1 approximant

A systematic study of the structures of ternary icosahedral Yb–Cd–Mg quasicrystals with different Mg contents has been carried out by single-crystal X-ray diffraction; occupational and positional disorder in the resulting structures was compared with that in a Yb–Cd–Mg 1/1 approximant.