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A stable icosahedral phase has been found in a series of Cd65Mg20RE15 (RE=Y, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) alloys. These icosahedral alloys have quasilattice parameters from 0.5571 to 0.5799 nm. Electron diffraction study confirmed that the icosahedral quasicrystals have a primitive icosahedral structure.
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Guo et al. (2000) studied this question.
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