Rb2Cd3Te4 crystallizes in the monoclinic C2/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to two equivalent Te(2), two equivalent Te(3), two equivalent Te(4), and two equivalent Te(5) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Te(2), one Te(3), two equivalent Te(1), two equivalent Te(4), and two equivalent Te(5) atoms. In the third Rb site, Rb(3) is bonded in a body-centered cubic geometry to two equivalent Te(4), two equivalent Te(5), and four equivalent Te(1) atoms. There are three inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Te(1), one Te(2), one Te(4), and one Te(5) atom to form a mixture of corner and edge-sharing CdTe4 tetrahedra. In the second Cd site, Cd(2) is bonded to one Te(1), one Te(3), and two equivalent Te(4) atoms to form a mixture of corner and edge-sharing CdTe4 tetrahedra. In the third Cd site, Cd(3) is bonded to one Te(1), one Te(2), and two equivalent Te(5) atoms to form a mixture of corner and edge-sharing CdTe4 tetrahedra. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to two equivalent Rb(2), two equivalent Rb(3), one Cd(1), one Cd(2), and one Cd(3) atom. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Cd(1), and two equivalent Cd(3) atoms. In the third Te site, Te(3) is bonded to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Cd(2) atoms to form distorted corner-sharing TeRb4Cd2 pentagonal pyramids. In the fourth Te site, Te(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one Cd(1), and two equivalent Cd(2) atoms. In the fifth Te site, Te(5) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one Cd(1), and two equivalent Cd(3) atoms.
Rb2Cd3Te4 crystallizes in the monoclinic C2/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to two equivalent Te(2), two equivalent Te(3), two equivalent Te(4), and two equivalent Te(5) atoms. Both Rb(1)-Te(2) bond lengths are 4.08 Å. Both Rb(1)-Te(3) bond lengths are 3.75 Å. Both Rb(1)-Te(4) bond lengths are 3.98 Å. Both Rb(1)-Te(5) bond lengths are 3.90 Å. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Te(2), one Te(3), two equivalent Te(1), two equivalent Te(4), and two equivalent Te(5) atoms. The Rb(2)-Te(2) bond length is 4.04 Å. The Rb(2)-Te(3) bond length is 3.74 Å. There is one shorter (3.80 Å) and one longer (4.16 Å) Rb(2)-Te(1) bond length. There is one shorter (3.86 Å) and one longer (4.06 Å) Rb(2)-Te(4) bond length. There is one shorter (3.80 Å) and one longer (3.97 Å) Rb(2)-Te(5) bond length. In the third Rb site, Rb(3) is bonded in a body-centered cubic geometry to two equivalent Te(4), two equivalent Te(5), and four equivalent Te(1) atoms. Both Rb(3)-Te(4) bond lengths are 3.95 Å. Both Rb(3)-Te(5) bond lengths are 3.94 Å. There are two shorter (3.82 Å) and two longer (4.03 Å) Rb(3)-Te(1) bond lengths. There are three inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Te(1), one Te(2), one Te(4), and one Te(5) atom to form a mixture of corner and edge-sharing CdTe4 tetrahedra. The Cd(1)-Te(1) bond length is 2.91 Å. The Cd(1)-Te(2) bond length is 3.01 Å. The Cd(1)-Te(4) bond length is 2.80 Å. The Cd(1)-Te(5) bond length is 2.83 Å. In the second Cd site, Cd(2) is bonded to one Te(1), one Te(3), and two equivalent Te(4) atoms to form a mixture of corner and edge-sharing CdTe4 tetrahedra. The Cd(2)-Te(1) bond length is 2.92 Å. The Cd(2)-Te(3) bond length is 2.76 Å. There is one shorter (2.88 Å) and one longer (3.00 Å) Cd(2)-Te(4) bond length. In the third Cd site, Cd(3) is bonded to one Te(1), one Te(2), and two equivalent Te(5) atoms to form a mixture of corner and edge-sharing CdTe4 tetrahedra. The Cd(3)-Te(1) bond length is 2.80 Å. The Cd(3)-Te(2) bond length is 2.97 Å. There is one shorter (2.84 Å) and one longer (2.92 Å) Cd(3)-Te(5) bond length. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to two equivalent Rb(2), two equivalent Rb(3), one Cd(1), one Cd(2), and one Cd(3) atom. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Cd(1), and two equivalent Cd(3) atoms. In the third Te site, Te(3) is bonded to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Cd(2) atoms to form distorted corner-sharing TeRb4Cd2 pentagonal pyramids. In the fourth Te site, Te(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one Cd(1), and two equivalent Cd(2) atoms. In the fifth Te site, Te(5) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), one Cd(1), and two equivalent Cd(3) atoms.