Abstract
In a recent paper, Dolin\ifmmode \check{s}\else \v{s}\fi{}ek et al. [Phys. Rev. B 74, 134201 (2006)] suggested that the insulating behavior of icosahedral $(i)$ Al-Pd-Re is of extrinsic origin. Large resistivities and insulatinglike properties of high resistivity samples were conjectured to result from the porous structure and the observed enhanced oxygen concentration in between the quasicrystal grains in some $i\text{\ensuremath{-}}\mathrm{Al}\text{\ensuremath{-}}\mathrm{Pd}\text{\ensuremath{-}}\mathrm{Re}$ samples. We point out that these hypotheses are incompatible with published work on the structure and properties of $i\text{\ensuremath{-}}\mathrm{Al}\text{\ensuremath{-}}\mathrm{Pd}\text{\ensuremath{-}}\mathrm{Re}$.
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