A2B_tI12_140_h_a & a,c/a,x2 --params=6.04,0.804635761589,0.158 & I4/mcm D_{4h}^{18} #140 (ah) & tI12 & C16 & Al_2Cu & Khatyrkite & J. A. Friauf, J. Am. Chem. Soc. 49, 3107-3114 (1927) 1.0000000000000000 -3.02000000000000 3.02000000000000 2.42999999999878 3.02000000000000 -3.02000000000000 2.42999999999878 3.02000000000000 3.02000000000000 -2.42999999999878 Al Cu 4 2 Direct 0.65800000000000 0.15800000000000 0.81600000000000 Al (8h) 0.15800000000000 0.34200000000000 0.50000000000000 Al (8h) 0.84200000000000 0.65800000000000 0.50000000000000 Al (8h) 0.34200000000000 0.84200000000000 0.18400000000000 Al (8h) 0.75000000000000 0.75000000000000 0.00000000000000 Cu (4a) 0.25000000000000 0.25000000000000 0.00000000000000 Cu (4a)