AB_tP2_123_a_d & a,c/a --params=2.8,1.31071428571 & P4/mmm D_{4h}^1 #123 (ad) & tP2 & L1_0 & CuAu & tetraauricupride & P. Bayliss, Can. Mineral. 28, 751-755 (1990) 1.0000000000000000 2.80000000000000 0.00000000000000 0.00000000000000 0.00000000000000 2.80000000000000 0.00000000000000 0.00000000000000 0.00000000000000 3.67000000000000 Au Cu 1 1 Direct 0.00000000000000 0.00000000000000 0.00000000000000 Au (1a) 0.50000000000000 0.50000000000000 0.50000000000000 Cu (1d)