AuTa2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 15-coordinate geometry to one Ta(1), two equivalent Ta(2), six equivalent Ta(3), two equivalent Au(1), and four equivalent Au(2) atoms. In the second Ta site, Ta(2) is bonded in a 4-coordinate geometry to one Ta(1) and four equivalent Au(2) atoms. In the third Ta site, Ta(3) is bonded in a 7-coordinate geometry to two equivalent Ta(3), three equivalent Ta(1), one Au(1), and four equivalent Au(2) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent Ta(1), four equivalent Ta(3), and four equivalent Au(2) atoms to form distorted edge-sharing AuTa8Au4 cuboctahedra. In the second Au site, Au(2) is bonded in a 12-coordinate geometry to two equivalent Ta(1), four equivalent Ta(2), four equivalent Ta(3), one Au(1), and one Au(2) atom.
AuTa2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 15-coordinate geometry to one Ta(1), two equivalent Ta(2), six equivalent Ta(3), two equivalent Au(1), and four equivalent Au(2) atoms. The Ta(1)-Ta(1) bond length is 2.98 Å. Both Ta(1)-Ta(2) bond lengths are 2.77 Å. There are four shorter (3.27 Å) and two longer (3.29 Å) Ta(1)-Ta(3) bond lengths. Both Ta(1)-Au(1) bond lengths are 3.00 Å. All Ta(1)-Au(2) bond lengths are 3.10 Å. In the second Ta site, Ta(2) is bonded in a 4-coordinate geometry to one Ta(1) and four equivalent Au(2) atoms. There are a spread of Ta(2)-Au(2) bond distances ranging from 2.77-2.82 Å. In the third Ta site, Ta(3) is bonded in a 7-coordinate geometry to two equivalent Ta(3), three equivalent Ta(1), one Au(1), and four equivalent Au(2) atoms. Both Ta(3)-Ta(3) bond lengths are 2.60 Å. The Ta(3)-Au(1) bond length is 2.91 Å. There are two shorter (2.91 Å) and two longer (2.93 Å) Ta(3)-Au(2) bond lengths. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent Ta(1), four equivalent Ta(3), and four equivalent Au(2) atoms to form distorted edge-sharing AuTa8Au4 cuboctahedra. All Au(1)-Au(2) bond lengths are 2.77 Å. In the second Au site, Au(2) is bonded in a 12-coordinate geometry to two equivalent Ta(1), four equivalent Ta(2), four equivalent Ta(3), one Au(1), and one Au(2) atom. The Au(2)-Au(2) bond length is 2.90 Å.