CaWP4O12 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form CaO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. W(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Ca(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Ca(1)O6 octahedra, corners with two equivalent W(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-64°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Ca(1)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-52°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one P(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Ca(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom.
CaWP4O12 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form CaO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. Both Ca(1)-O(4) bond lengths are 2.32 Å. Both Ca(1)-O(5) bond lengths are 2.63 Å. Both Ca(1)-O(6) bond lengths are 2.25 Å. W(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Ca(1)O6 octahedra. Both W(1)-O(3) bond lengths are 2.16 Å. Both W(1)-O(4) bond lengths are 2.71 Å. Both W(1)-O(5) bond lengths are 2.20 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Ca(1)O6 octahedra, corners with two equivalent W(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-64°. The P(1)-O(1) bond length is 1.62 Å. The P(1)-O(2) bond length is 1.62 Å. The P(1)-O(3) bond length is 1.49 Å. The P(1)-O(4) bond length is 1.50 Å. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Ca(1)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-52°. The P(2)-O(1) bond length is 1.65 Å. The P(2)-O(2) bond length is 1.61 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.48 Å. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one P(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one W(1), and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Ca(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom.