Ca(WO2)2 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the second W site, W(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent W(1) atoms to form a mixture of corner and edge-sharing OCa2W3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Ca(1), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids.
Ca(WO2)2 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Ca(1)-O(1) bond lengths are 2.53 Å. There is one shorter (2.66 Å) and one longer (2.70 Å) Ca(1)-O(2) bond length. Both Ca(1)-O(3) bond lengths are 2.47 Å. Both Ca(1)-O(4) bond lengths are 2.56 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. The W(1)-O(4) bond length is 2.22 Å. Both W(1)-O(2) bond lengths are 2.14 Å. There is one shorter (2.20 Å) and two longer (2.24 Å) W(1)-O(3) bond lengths. In the second W site, W(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. The W(2)-O(2) bond length is 2.15 Å. Both W(2)-O(4) bond lengths are 2.22 Å. There are two shorter (2.20 Å) and one longer (2.21 Å) W(2)-O(1) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(1), one W(2), and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent W(1) atoms to form a mixture of corner and edge-sharing OCa2W3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Ca(1), one W(1), and two equivalent W(2) atoms to form a mixture of distorted corner and edge-sharing OCa2W3 trigonal bipyramids.