R-PHASE AND ICOSAHEDRAL PHASE IN AL-FE-CU ALLOY

In this letter we report of A1₆₅Fe₁₅Cu₂₀ alloy by means of electron and X-ray diffractometry. A new crystalline phase of body-center-cubic structure with a lattice parameter a_°=1.407nm was observed together with the icosahedral phase in the same sample. The new phase is supposed to be an isomorph of Mg₃₂(A1, Zn)₄₉ (R phase) on the basis of structure factor calculation.