Rb2MgV2(CuS2)4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one S(2), one S(7), one S(8), two equivalent S(1), and two equivalent S(5) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one Cu(3), one S(4), one S(6), two equivalent S(5), and two equivalent S(7) atoms. Mg(1) is bonded in a 6-coordinate geometry to one Cu(3), one Cu(4), one S(2), one S(3), one S(5), and one S(6) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent Cu(3), one S(2), one S(4), one S(5), and one S(6) atom to form distorted VCu2S4 tetrahedra that share corners with two equivalent V(1)Cu2S4 tetrahedra and  an edgeedge with one Cu(1)S4 tetrahedra. In the second V site, V(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form VS4 tetrahedra that share  an edgeedge with one Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2), one S(3), one S(4), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one V(1)Cu2S4 tetrahedra, and  an edgeedge with one V(2)S4 tetrahedra. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent V(2)S4 tetrahedra. In the third Cu site, Cu(3) is bonded in a 7-coordinate geometry to one Rb(2), one Mg(1), two equivalent V(1), one S(2), one S(4), and one S(5) atom. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(6) atom. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one V(2), one Cu(2), and one Cu(4) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one Rb(1), one Mg(1), one V(1), one Cu(1), one Cu(3), and one Cu(4) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one V(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Rb(2), one V(1), one Cu(1), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), one V(1), and one Cu(3) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one V(1), and one Cu(4) atom. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Rb(2), one V(2), and one Cu(2) atom. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Rb(1), one V(2), one Cu(1), and one Cu(2) atom.
Rb2MgV2(CuS2)4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one S(2), one S(7), one S(8), two equivalent S(1), and two equivalent S(5) atoms. The Rb(1)-S(2) bond length is 3.55 Å. The Rb(1)-S(7) bond length is 3.74 Å. The Rb(1)-S(8) bond length is 3.81 Å. There is one shorter (3.71 Å) and one longer (3.75 Å) Rb(1)-S(1) bond length. There is one shorter (3.51 Å) and one longer (3.84 Å) Rb(1)-S(5) bond length. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one Cu(3), one S(4), one S(6), two equivalent S(5), and two equivalent S(7) atoms. The Rb(2)-Cu(3) bond length is 3.55 Å. The Rb(2)-S(4) bond length is 3.30 Å. The Rb(2)-S(6) bond length is 3.59 Å. There is one shorter (3.90 Å) and one longer (3.95 Å) Rb(2)-S(5) bond length. There is one shorter (3.32 Å) and one longer (3.37 Å) Rb(2)-S(7) bond length. Mg(1) is bonded in a 6-coordinate geometry to one Cu(3), one Cu(4), one S(2), one S(3), one S(5), and one S(6) atom. The Mg(1)-Cu(3) bond length is 2.67 Å. The Mg(1)-Cu(4) bond length is 2.77 Å. The Mg(1)-S(2) bond length is 2.53 Å. The Mg(1)-S(3) bond length is 2.61 Å. The Mg(1)-S(5) bond length is 2.65 Å. The Mg(1)-S(6) bond length is 2.37 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent Cu(3), one S(2), one S(4), one S(5), and one S(6) atom to form distorted VCu2S4 tetrahedra that share corners with two equivalent V(1)Cu2S4 tetrahedra and  an edgeedge with one Cu(1)S4 tetrahedra. There is one shorter (2.82 Å) and one longer (2.98 Å) V(1)-Cu(3) bond length. The V(1)-S(2) bond length is 2.33 Å. The V(1)-S(4) bond length is 2.28 Å. The V(1)-S(5) bond length is 2.29 Å. The V(1)-S(6) bond length is 2.31 Å. In the second V site, V(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form VS4 tetrahedra that share  an edgeedge with one Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. The V(2)-S(1) bond length is 2.22 Å. The V(2)-S(3) bond length is 2.28 Å. The V(2)-S(7) bond length is 2.17 Å. The V(2)-S(8) bond length is 2.20 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2), one S(3), one S(4), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one V(1)Cu2S4 tetrahedra, and  an edgeedge with one V(2)S4 tetrahedra. The Cu(1)-S(2) bond length is 2.41 Å. The Cu(1)-S(3) bond length is 2.35 Å. The Cu(1)-S(4) bond length is 2.29 Å. The Cu(1)-S(8) bond length is 2.30 Å. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent V(2)S4 tetrahedra. The Cu(2)-S(1) bond length is 2.32 Å. The Cu(2)-S(3) bond length is 2.35 Å. The Cu(2)-S(7) bond length is 2.30 Å. The Cu(2)-S(8) bond length is 2.31 Å. In the third Cu site, Cu(3) is bonded in a 7-coordinate geometry to one Rb(2), one Mg(1), two equivalent V(1), one S(2), one S(4), and one S(5) atom. The Cu(3)-S(2) bond length is 2.42 Å. The Cu(3)-S(4) bond length is 2.18 Å. The Cu(3)-S(5) bond length is 2.27 Å. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(6) atom. The Cu(4)-S(1) bond length is 2.25 Å. The Cu(4)-S(2) bond length is 2.46 Å. The Cu(4)-S(3) bond length is 2.41 Å. The Cu(4)-S(6) bond length is 2.30 Å. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one V(2), one Cu(2), and one Cu(4) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one Rb(1), one Mg(1), one V(1), one Cu(1), one Cu(3), and one Cu(4) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one V(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Rb(2), one V(1), one Cu(1), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), one V(1), and one Cu(3) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one V(1), and one Cu(4) atom. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Rb(2), one V(2), and one Cu(2) atom. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Rb(1), one V(2), one Cu(1), and one Cu(2) atom.