CsNb(CuTe2)2 crystallizes in the orthorhombic Pna2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one Te(3), two equivalent Te(1), two equivalent Te(2), and four equivalent Te(4) atoms. Nb(1) is bonded to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), one Te(3), and one Te(4) atom to form distorted corner-sharing NbCu4Te4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Nb(1), one Te(1), one Te(2), and two equivalent Te(3) atoms. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Nb(1), one Te(1), one Te(2), one Te(3), and one Te(4) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the second Te site, Te(2) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the third Te site, Te(3) is bonded in a distorted pentagonal planar geometry to one Cs(1), one Nb(1), one Cu(2), and two equivalent Cu(1) atoms. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to four equivalent Cs(1), one Nb(1), and one Cu(2) atom.
CsNb(CuTe2)2 crystallizes in the orthorhombic Pna2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one Te(3), two equivalent Te(1), two equivalent Te(2), and four equivalent Te(4) atoms. The Cs(1)-Te(3) bond length is 3.95 Å. There is one shorter (4.01 Å) and one longer (4.04 Å) Cs(1)-Te(1) bond length. There is one shorter (4.09 Å) and one longer (4.11 Å) Cs(1)-Te(2) bond length. There are a spread of Cs(1)-Te(4) bond distances ranging from 3.84-4.29 Å. Nb(1) is bonded to two equivalent Cu(1), two equivalent Cu(2), one Te(1), one Te(2), one Te(3), and one Te(4) atom to form distorted corner-sharing NbCu4Te4 tetrahedra. There is one shorter (3.00 Å) and one longer (3.01 Å) Nb(1)-Cu(1) bond length. Both Nb(1)-Cu(2) bond lengths are 3.03 Å. The Nb(1)-Te(1) bond length is 2.65 Å. The Nb(1)-Te(2) bond length is 2.64 Å. The Nb(1)-Te(3) bond length is 2.67 Å. The Nb(1)-Te(4) bond length is 2.64 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Nb(1), one Te(1), one Te(2), and two equivalent Te(3) atoms. The Cu(1)-Te(1) bond length is 2.63 Å. The Cu(1)-Te(2) bond length is 2.62 Å. Both Cu(1)-Te(3) bond lengths are 2.63 Å. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Nb(1), one Te(1), one Te(2), one Te(3), and one Te(4) atom. The Cu(2)-Te(1) bond length is 2.63 Å. The Cu(2)-Te(2) bond length is 2.62 Å. The Cu(2)-Te(3) bond length is 2.63 Å. The Cu(2)-Te(4) bond length is 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 Cs(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the second Te site, Te(2) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the third Te site, Te(3) is bonded in a distorted pentagonal planar geometry to one Cs(1), one Nb(1), one Cu(2), and two equivalent Cu(1) atoms. In the fourth Te site, Te(4) is bonded in a 6-coordinate geometry to four equivalent Cs(1), one Nb(1), and one Cu(2) atom.