CaW3O7 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent W(1) atoms. In the third O site, O(1) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of corner and edge-sharing OCaW3 tetrahedra. In the fourth O site, O(2) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCaW3 trigonal pyramids.
CaW3O7 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. The Ca(1)-O(3) bond length is 2.41 Å. Both Ca(1)-O(1) bond lengths are 2.44 Å. Both Ca(1)-O(2) bond lengths are 2.48 Å. Both Ca(1)-O(4) bond lengths are 2.34 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. The W(1)-O(3) bond length is 2.80 Å. There is one shorter (2.09 Å) and one longer (2.17 Å) W(1)-O(1) bond length. There is one shorter (2.18 Å) and one longer (2.20 Å) W(1)-O(2) bond length. There is one shorter (2.04 Å) and one longer (2.07 Å) W(1)-O(4) bond length. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. The W(2)-O(3) bond length is 1.94 Å. Both W(2)-O(1) bond lengths are 2.10 Å. Both W(2)-O(2) bond lengths are 2.03 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one Ca(1), one W(2), and two equivalent W(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent W(1) atoms. In the third O site, O(1) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of corner and edge-sharing OCaW3 tetrahedra. In the fourth O site, O(2) is bonded to one Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCaW3 trigonal pyramids.