Na7Cu7O13 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the second Na site, Na(2) is bonded to one O(11), one O(12), one O(13), one O(7), and one O(8) atom to form distorted NaO5 square pyramids that share  a cornercorner with one Na(5)O5 trigonal bipyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the third Na site, Na(3) is bonded to one O(11), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(7) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fifth Na site, Na(5) is bonded to one O(10), one O(13), one O(4), one O(6), and one O(9) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the sixth Na site, Na(6) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(5) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(5)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), one O(3), one O(5), and one O(8) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. There are seven inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a T-shaped geometry to one O(10), one O(11), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(4), one O(5), and one O(8) atom. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(13), one O(5), one O(7), and one O(8) atom. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(12), one O(13), one O(7), and one O(9) atom. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the seventh Cu site, Cu(7) is bonded in a square co-planar geometry to one O(10), one O(11), one O(2), and one O(3) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(6), one Na(7), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the second O site, O(2) is bonded to one Na(3), one Na(4), one Na(6), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Na(7), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fourth O site, O(4) is bonded to one Na(3), one Na(5), one Na(6), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fifth O site, O(5) is bonded to one Na(4), one Na(6), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the sixth O site, O(6) is bonded to one Na(1), one Na(4), one Na(5), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Na(4), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eighth O site, O(8) is bonded to one Na(2), one Na(3), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(5), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the tenth O site, O(10) is bonded to one Na(4), one Na(5), one Na(7), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one Na(4), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(6), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(5), one Na(7), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids.
Na7Cu7O13 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. The Na(1)-O(1) bond length is 2.43 Å. The Na(1)-O(12) bond length is 2.39 Å. The Na(1)-O(3) bond length is 2.39 Å. The Na(1)-O(6) bond length is 2.47 Å. The Na(1)-O(7) bond length is 2.38 Å. The Na(1)-O(9) bond length is 2.40 Å. In the second Na site, Na(2) is bonded to one O(11), one O(12), one O(13), one O(7), and one O(8) atom to form distorted NaO5 square pyramids that share  a cornercorner with one Na(5)O5 trigonal bipyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. The Na(2)-O(11) bond length is 2.31 Å. The Na(2)-O(12) bond length is 2.39 Å. The Na(2)-O(13) bond length is 2.40 Å. The Na(2)-O(7) bond length is 2.38 Å. The Na(2)-O(8) bond length is 2.36 Å. In the third Na site, Na(3) is bonded to one O(11), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. The Na(3)-O(11) bond length is 2.34 Å. The Na(3)-O(2) bond length is 2.39 Å. The Na(3)-O(3) bond length is 2.41 Å. The Na(3)-O(4) bond length is 2.42 Å. The Na(3)-O(8) bond length is 2.46 Å. The Na(3)-O(9) bond length is 2.38 Å. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(7) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. The Na(4)-O(10) bond length is 2.39 Å. The Na(4)-O(11) bond length is 2.38 Å. The Na(4)-O(2) bond length is 2.39 Å. The Na(4)-O(5) bond length is 2.43 Å. The Na(4)-O(6) bond length is 2.43 Å. The Na(4)-O(7) bond length is 2.46 Å. In the fifth Na site, Na(5) is bonded to one O(10), one O(13), one O(4), one O(6), and one O(9) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. The Na(5)-O(10) bond length is 2.37 Å. The Na(5)-O(13) bond length is 2.41 Å. The Na(5)-O(4) bond length is 2.37 Å. The Na(5)-O(6) bond length is 2.33 Å. The Na(5)-O(9) bond length is 2.40 Å. In the sixth Na site, Na(6) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(5) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(5)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. The Na(6)-O(1) bond length is 2.35 Å. The Na(6)-O(12) bond length is 2.42 Å. The Na(6)-O(2) bond length is 2.40 Å. The Na(6)-O(4) bond length is 2.32 Å. The Na(6)-O(5) bond length is 2.32 Å. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), one O(3), one O(5), and one O(8) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. The Na(7)-O(1) bond length is 2.39 Å. The Na(7)-O(10) bond length is 2.43 Å. The Na(7)-O(13) bond length is 2.39 Å. The Na(7)-O(3) bond length is 2.44 Å. The Na(7)-O(5) bond length is 2.41 Å. The Na(7)-O(8) bond length is 2.37 Å. There are seven inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a T-shaped geometry to one O(10), one O(11), and one O(6) atom. The Cu(1)-O(10) bond length is 1.87 Å. The Cu(1)-O(11) bond length is 1.92 Å. The Cu(1)-O(6) bond length is 1.79 Å. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. The Cu(2)-O(1) bond length is 1.87 Å. The Cu(2)-O(4) bond length is 1.93 Å. The Cu(2)-O(6) bond length is 1.80 Å. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(4), one O(5), and one O(8) atom. The Cu(3)-O(1) bond length is 1.87 Å. The Cu(3)-O(4) bond length is 1.84 Å. The Cu(3)-O(5) bond length is 1.87 Å. The Cu(3)-O(8) bond length is 1.87 Å. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(13), one O(5), one O(7), and one O(8) atom. The Cu(4)-O(13) bond length is 1.87 Å. The Cu(4)-O(5) bond length is 1.84 Å. The Cu(4)-O(7) bond length is 1.86 Å. The Cu(4)-O(8) bond length is 1.86 Å. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(12), one O(13), one O(7), and one O(9) atom. The Cu(5)-O(12) bond length is 1.86 Å. The Cu(5)-O(13) bond length is 1.85 Å. The Cu(5)-O(7) bond length is 1.86 Å. The Cu(5)-O(9) bond length is 1.85 Å. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to one O(12), one O(2), one O(3), and one O(9) atom. The Cu(6)-O(12) bond length is 1.87 Å. The Cu(6)-O(2) bond length is 1.86 Å. The Cu(6)-O(3) bond length is 1.85 Å. The Cu(6)-O(9) bond length is 1.86 Å. In the seventh Cu site, Cu(7) is bonded in a square co-planar geometry to one O(10), one O(11), one O(2), and one O(3) atom. The Cu(7)-O(10) bond length is 1.87 Å. The Cu(7)-O(11) bond length is 1.83 Å. The Cu(7)-O(2) bond length is 1.86 Å. The Cu(7)-O(3) bond length is 1.87 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(6), one Na(7), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the second O site, O(2) is bonded to one Na(3), one Na(4), one Na(6), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Na(7), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fourth O site, O(4) is bonded to one Na(3), one Na(5), one Na(6), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fifth O site, O(5) is bonded to one Na(4), one Na(6), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the sixth O site, O(6) is bonded to one Na(1), one Na(4), one Na(5), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Na(4), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eighth O site, O(8) is bonded to one Na(2), one Na(3), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(5), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the tenth O site, O(10) is bonded to one Na(4), one Na(5), one Na(7), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one Na(4), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(6), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(5), one Na(7), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids.