RbTaCu2Te4 crystallizes in the orthorhombic Ama2 space group. Rb(1) is bonded in a 9-coordinate geometry to one Te(1), four equivalent Te(2), and four equivalent Te(3) atoms. Ta(1) is bonded to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), and two equivalent Te(3) atoms to form distorted corner-sharing TaCu4Te4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Ta(1), two equivalent Te(1), and two equivalent Te(3) atoms. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Ta(1), one Te(1), one Te(2), and two equivalent Te(3) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted pentagonal planar geometry to one Rb(1), one Ta(1), one Cu(2), and two equivalent Cu(1) atoms. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Ta(1), and one Cu(2) atom. In the third Te site, Te(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Ta(1), one Cu(1), and one Cu(2) atom.
RbTaCu2Te4 crystallizes in the orthorhombic Ama2 space group. Rb(1) is bonded in a 9-coordinate geometry to one Te(1), four equivalent Te(2), and four equivalent Te(3) atoms. The Rb(1)-Te(1) bond length is 3.92 Å. There are a spread of Rb(1)-Te(2) bond distances ranging from 3.74-4.24 Å. There are two shorter (4.01 Å) and two longer (4.09 Å) Rb(1)-Te(3) bond lengths. Ta(1) is bonded to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), and two equivalent Te(3) atoms to form distorted corner-sharing TaCu4Te4 tetrahedra. Both Ta(1)-Cu(1) bond lengths are 3.04 Å. There is one shorter (3.05 Å) and one longer (3.06 Å) Ta(1)-Cu(2) bond length. The Ta(1)-Te(1) bond length is 2.67 Å. The Ta(1)-Te(2) bond length is 2.64 Å. Both Ta(1)-Te(3) bond lengths are 2.65 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Ta(1), two equivalent Te(1), and two equivalent Te(3) atoms. Both Cu(1)-Te(1) bond lengths are 2.66 Å. Both Cu(1)-Te(3) bond lengths are 2.65 Å. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Ta(1), one Te(1), one Te(2), and two equivalent Te(3) atoms. The Cu(2)-Te(1) bond length is 2.66 Å. The Cu(2)-Te(2) bond length is 2.65 Å. Both Cu(2)-Te(3) bond lengths are 2.65 Å. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted pentagonal planar geometry to one Rb(1), one Ta(1), one Cu(2), and two equivalent Cu(1) atoms. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Ta(1), and one Cu(2) atom. In the third Te site, Te(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Ta(1), one Cu(1), and one Cu(2) atom.