CaCu2(SnO4)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(7) atom. In the second Sn site, Sn(2) is bonded in a distorted trigonal bipyramidal geometry to one O(3), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Ca(1), one Cu(1), one Sn(1), and one Sn(2) atom. In the second O site, O(8) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Cu(2), and one Sn(2) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Cu(1), and one Sn(1) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cu(2) and one Sn(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one Sn(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Cu(2), and one Sn(1) atom. In the seventh O site, O(5) is bonded in a water-like geometry to one Cu(1) and one Sn(2) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), one Sn(1), and one Sn(2) atom.
CaCu2(SnO4)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms. The Ca(1)-O(1) bond length is 2.33 Å. The Ca(1)-O(4) bond length is 2.37 Å. The Ca(1)-O(7) bond length is 2.62 Å. The Ca(1)-O(8) bond length is 2.37 Å. There is one shorter (2.26 Å) and one longer (2.29 Å) Ca(1)-O(3) bond length. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(5), one O(6), and one O(7) atom. The Cu(1)-O(1) bond length is 1.86 Å. The Cu(1)-O(5) bond length is 1.81 Å. The Cu(1)-O(6) bond length is 1.88 Å. The Cu(1)-O(7) bond length is 1.92 Å. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. The Cu(2)-O(2) bond length is 1.85 Å. The Cu(2)-O(4) bond length is 1.86 Å. The Cu(2)-O(6) bond length is 1.92 Å. The Cu(2)-O(8) bond length is 1.84 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(7) atom. The Sn(1)-O(1) bond length is 1.99 Å. The Sn(1)-O(2) bond length is 1.99 Å. The Sn(1)-O(4) bond length is 1.98 Å. The Sn(1)-O(6) bond length is 2.58 Å. The Sn(1)-O(7) bond length is 2.06 Å. In the second Sn site, Sn(2) is bonded in a distorted trigonal bipyramidal geometry to one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Sn(2)-O(3) bond length is 1.95 Å. The Sn(2)-O(5) bond length is 2.04 Å. The Sn(2)-O(6) bond length is 2.10 Å. The Sn(2)-O(7) bond length is 2.26 Å. The Sn(2)-O(8) bond length is 2.01 Å. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Ca(1), one Cu(1), one Sn(1), and one Sn(2) atom. In the second O site, O(8) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Cu(2), and one Sn(2) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Cu(1), and one Sn(1) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cu(2) and one Sn(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one Sn(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Cu(2), and one Sn(1) atom. In the seventh O site, O(5) is bonded in a water-like geometry to one Cu(1) and one Sn(2) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), one Sn(1), and one Sn(2) atom.