NaNb(CuS2)2 crystallizes in the orthorhombic Ama2 space group. Na(1) is bonded in a distorted rectangular see-saw-like geometry to one S(1), one S(3), and two equivalent S(2) atoms. Nb(1) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form NbS4 tetrahedra that share edges with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent S(2) and two equivalent S(3) atoms to form CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra, corners with four equivalent Cu(2)S4 tetrahedra, and edges with two equivalent Nb(1)S4 tetrahedra. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form distorted CuS4 tetrahedra that share corners with four equivalent Cu(1)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Nb(1), and one Cu(2) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Na(1), one Nb(1), one Cu(2), and two equivalent Cu(1) atoms.
NaNb(CuS2)2 crystallizes in the orthorhombic Ama2 space group. Na(1) is bonded in a distorted rectangular see-saw-like geometry to one S(1), one S(3), and two equivalent S(2) atoms. The Na(1)-S(1) bond length is 2.84 Å. The Na(1)-S(3) bond length is 3.37 Å. Both Na(1)-S(2) bond lengths are 2.88 Å. Nb(1) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form NbS4 tetrahedra that share edges with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. The Nb(1)-S(1) bond length is 2.28 Å. The Nb(1)-S(3) bond length is 2.35 Å. Both Nb(1)-S(2) bond lengths are 2.33 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent S(2) and two equivalent S(3) atoms to form CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra, corners with four equivalent Cu(2)S4 tetrahedra, and edges with two equivalent Nb(1)S4 tetrahedra. Both Cu(1)-S(2) bond lengths are 2.32 Å. Both Cu(1)-S(3) bond lengths are 2.37 Å. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form distorted CuS4 tetrahedra that share corners with four equivalent Cu(1)S4 tetrahedra and edges with two equivalent Nb(1)S4 tetrahedra. The Cu(2)-S(1) bond length is 2.32 Å. The Cu(2)-S(3) bond length is 2.38 Å. Both Cu(2)-S(2) bond lengths are 2.34 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Nb(1), and one Cu(2) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Nb(1), one Cu(1), and one Cu(2) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Na(1), one Nb(1), one Cu(2), and two equivalent Cu(1) atoms.