Co7CuAs4(HO5)4 crystallizes in the monoclinic Pm space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(13), one O(14), one O(3), one O(4), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and edges with two equivalent Co(1)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(11), one O(12), one O(15), one O(16), and one O(2) atom to form CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and edges with two equivalent Co(2)O6 octahedra. In the third Co site, Co(3) is bonded to one O(14), one O(7), one O(8), and two equivalent O(2) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra, corners with two equivalent As(2)O4 tetrahedra, and  an edgeedge with one Cu(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. In the fourth Co site, Co(4) is bonded to one O(15), one O(5), one O(6), and two equivalent O(3) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(3)O4 tetrahedra, and  an edgeedge with one Co(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. In the fifth Co site, Co(5) is bonded to one O(16), one O(5), one O(6), and two equivalent O(4) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(4)O4 tetrahedra, and  an edgeedge with one Co(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-66°. Cu(1) is bonded to one O(13), one O(7), one O(8), and two equivalent O(1) atoms to form CuO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and  an edgeedge with one Co(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-62°. There are four inequivalent As sites. In the first As site, As(1) is bonded to one O(5), one O(9), and two equivalent O(1) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-64°. In the second As site, As(2) is bonded to one O(10), one O(6), and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Co(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-65°. In the third As site, As(3) is bonded to one O(11), one O(7), and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and corners with two equivalent Co(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-64°. In the fourth As site, As(4) is bonded to one O(12), one O(8), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and corners with two equivalent Co(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-63°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(13) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(14) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(15) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(16) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(2), one Cu(1), and one As(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(2), one Co(3), and one As(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Co(1), one Co(4), and one As(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(1), one Co(5), and one As(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(5), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(5), and one As(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(3), one Cu(1), and one As(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(3), one Cu(1), and one As(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to two equivalent Co(1), one Cu(1), and one H(1) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Co(3), two equivalent Co(1), and one H(2) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Co(4), two equivalent Co(2), and one H(3) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Co(5), two equivalent Co(2), and one H(4) atom.
Co7CuAs4(HO5)4 crystallizes in the monoclinic Pm space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(13), one O(14), one O(3), one O(4), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and edges with two equivalent Co(1)O6 octahedra. The Co(1)-O(10) bond length is 2.09 Å. The Co(1)-O(13) bond length is 2.11 Å. The Co(1)-O(14) bond length is 2.08 Å. The Co(1)-O(3) bond length is 2.25 Å. The Co(1)-O(4) bond length is 2.26 Å. The Co(1)-O(9) bond length is 2.09 Å. In the second Co site, Co(2) is bonded to one O(1), one O(11), one O(12), one O(15), one O(16), and one O(2) atom to form CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and edges with two equivalent Co(2)O6 octahedra. The Co(2)-O(1) bond length is 2.20 Å. The Co(2)-O(11) bond length is 2.09 Å. The Co(2)-O(12) bond length is 2.10 Å. The Co(2)-O(15) bond length is 2.08 Å. The Co(2)-O(16) bond length is 2.09 Å. The Co(2)-O(2) bond length is 2.29 Å. In the third Co site, Co(3) is bonded to one O(14), one O(7), one O(8), and two equivalent O(2) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra, corners with two equivalent As(2)O4 tetrahedra, and  an edgeedge with one Cu(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. The Co(3)-O(14) bond length is 2.11 Å. The Co(3)-O(7) bond length is 2.02 Å. The Co(3)-O(8) bond length is 2.02 Å. Both Co(3)-O(2) bond lengths are 2.04 Å. In the fourth Co site, Co(4) is bonded to one O(15), one O(5), one O(6), and two equivalent O(3) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(3)O4 tetrahedra, and  an edgeedge with one Co(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. The Co(4)-O(15) bond length is 2.09 Å. The Co(4)-O(5) bond length is 2.01 Å. The Co(4)-O(6) bond length is 2.04 Å. Both Co(4)-O(3) bond lengths are 2.04 Å. In the fifth Co site, Co(5) is bonded to one O(16), one O(5), one O(6), and two equivalent O(4) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(4)O4 tetrahedra, and  an edgeedge with one Co(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-66°. The Co(5)-O(16) bond length is 2.09 Å. The Co(5)-O(5) bond length is 2.03 Å. The Co(5)-O(6) bond length is 2.02 Å. Both Co(5)-O(4) bond lengths are 2.05 Å. Cu(1) is bonded to one O(13), one O(7), one O(8), and two equivalent O(1) atoms to form CuO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one As(3)O4 tetrahedra,  a cornercorner with one As(4)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and  an edgeedge with one Co(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-62°. The Cu(1)-O(13) bond length is 1.98 Å. The Cu(1)-O(7) bond length is 2.00 Å. The Cu(1)-O(8) bond length is 2.03 Å. Both Cu(1)-O(1) bond lengths are 2.08 Å. There are four inequivalent As sites. In the first As site, As(1) is bonded to one O(5), one O(9), and two equivalent O(1) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-64°. The As(1)-O(5) bond length is 1.73 Å. The As(1)-O(9) bond length is 1.74 Å. Both As(1)-O(1) bond lengths are 1.73 Å. In the second As site, As(2) is bonded to one O(10), one O(6), and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(4)O5 trigonal bipyramid,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Co(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-65°. The As(2)-O(10) bond length is 1.73 Å. The As(2)-O(6) bond length is 1.72 Å. Both As(2)-O(2) bond lengths are 1.73 Å. In the third As site, As(3) is bonded to one O(11), one O(7), and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and corners with two equivalent Co(4)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 56-64°. The As(3)-O(11) bond length is 1.72 Å. The As(3)-O(7) bond length is 1.72 Å. Both As(3)-O(3) bond lengths are 1.73 Å. In the fourth As site, As(4) is bonded to one O(12), one O(8), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid, and corners with two equivalent Co(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-63°. The As(4)-O(12) bond length is 1.72 Å. The As(4)-O(8) bond length is 1.74 Å. Both As(4)-O(4) bond lengths are 1.73 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(13) atom. The H(1)-O(13) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(14) atom. The H(2)-O(14) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(15) atom. The H(3)-O(15) bond length is 0.97 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(16) atom. The H(4)-O(16) bond length is 0.97 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(2), one Cu(1), and one As(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(2), one Co(3), and one As(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Co(1), one Co(4), and one As(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(1), one Co(5), and one As(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(5), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(5), and one As(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(3), one Cu(1), and one As(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(3), one Cu(1), and one As(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to two equivalent Co(1), one Cu(1), and one H(1) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Co(3), two equivalent Co(1), and one H(2) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Co(4), two equivalent Co(2), and one H(3) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Co(5), two equivalent Co(2), and one H(4) atom.