Crystal structure of AlFe 0.95 .

Three B2-type inter-metallic AlFe 1 - δ phases (0.18 < δ < 0.05) in the Al-Fe binary system were synthesized by smelting and high temperature sinter-ing methods. The exact crystal structure for δ = 0.05 was refined by single-crystal X-ray diffraction. The amount of vacancy defects at the Fe atom sites was obtained by refining the corresponding site occupancy factor, converging to the chemical formula AlFe 0.95 , with a structure identical to that of ideal AlFe models inferred from powder X-ray or neutron diffraction patterns.