RbTaCu2Te4 crystallizes in the orthorhombic Pna2_1 space group. Rb(1) is bonded in a 9-coordinate geometry to one Te(2), two equivalent Te(1), two equivalent Te(3), and four equivalent Te(4) atoms. Ta(1) is bonded in a 8-coordinate geometry to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), one Te(3), and one Te(4) atom. 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), one Te(1), one Te(2), one Te(3), and one Te(4) atom. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Ta(1), one Te(1), one Te(3), and two equivalent Te(2) atoms. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Ta(1), one Cu(1), and one Cu(2) atom. In the second Te site, Te(2) is bonded in a distorted pentagonal planar geometry to one Rb(1), one Ta(1), one Cu(1), and two equivalent Cu(2) atoms. 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. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Ta(1), and one Cu(1) atom.
RbTaCu2Te4 crystallizes in the orthorhombic Pna2_1 space group. Rb(1) is bonded in a 9-coordinate geometry to one Te(2), two equivalent Te(1), two equivalent Te(3), and four equivalent Te(4) atoms. The Rb(1)-Te(2) bond length is 3.81 Å. There is one shorter (3.92 Å) and one longer (3.96 Å) Rb(1)-Te(1) bond length. There is one shorter (3.95 Å) and one longer (3.99 Å) Rb(1)-Te(3) bond length. There are a spread of Rb(1)-Te(4) bond distances ranging from 3.65-4.17 Å. Ta(1) is bonded in a 8-coordinate geometry to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), one Te(3), and one Te(4) atom. There is one shorter (3.01 Å) and one longer (3.02 Å) Ta(1)-Cu(1) bond length. Both Ta(1)-Cu(2) bond lengths are 2.98 Å. The Ta(1)-Te(1) bond length is 2.64 Å. The Ta(1)-Te(2) bond length is 2.67 Å. The Ta(1)-Te(3) bond length is 2.64 Å. The Ta(1)-Te(4) bond length is 2.63 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), one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Cu(1)-Te(1) bond length is 2.62 Å. The Cu(1)-Te(2) bond length is 2.62 Å. The Cu(1)-Te(3) bond length is 2.62 Å. The Cu(1)-Te(4) bond length is 2.63 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(3), and two equivalent Te(2) atoms. The Cu(2)-Te(1) bond length is 2.62 Å. The Cu(2)-Te(3) bond length is 2.62 Å. Both Cu(2)-Te(2) bond lengths are 2.62 Å. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Ta(1), one Cu(1), and one Cu(2) atom. In the second Te site, Te(2) is bonded in a distorted pentagonal planar geometry to one Rb(1), one Ta(1), one Cu(1), and two equivalent Cu(2) atoms. 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. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Ta(1), and one Cu(1) atom.