Single-phase icosahedral quasicrystals of the composition Al80Mo9Fe11 and Al70Ta10Fe20 have been prepared by rapid quenching from the melt. X-ray-diffraction measurements have yielded quasilattice constants of 4.6000.003 A for both alloys. Room-temperature Fe57 Mössbauer-effect measurements show a nearly symmetric doublet in Al-Mo-Fe and an asymmetric doublet in Al-Ta-Fe. These results are analyzed in terms of various distributions of Fe quadrupole splittings. Magnetization measurements for both alloys show a magnetization that exhibits Curie paramagnetism at low temperatures (T100 K) and Pauli paramagnetism at higher temperatures. These results show a localized Fe moment of 0.19B in Al-Mo-Fe and 0.48B in Al-Ta-Fe. © 1989 The American Physical Society.