CaP2(WO4)2 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), two equivalent O(2), and two equivalent O(8) atoms. There are three inequivalent W sites. In the first W site, W(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(6), and one O(7) atom. In the second W site, W(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. In the third W site, W(3) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form WO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one W(3)O6 octahedra. The corner-sharing octahedral tilt angles are 43°. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1), one W(2), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one W(1), and one P(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ca(1) and one P(2) atom. In the fourth O site, O(4) is bonded to one Ca(1), one W(1), one W(2), and one P(1) atom to form distorted corner-sharing OCaPW2 trigonal pyramids. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one W(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one W(1), one W(3), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one W(1), one W(3), and one P(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent Ca(1) and one P(1) atom.
CaP2(WO4)2 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), two equivalent O(2), and two equivalent O(8) atoms. The Ca(1)-O(1) bond length is 2.49 Å. The Ca(1)-O(3) bond length is 2.33 Å. The Ca(1)-O(4) bond length is 2.58 Å. The Ca(1)-O(5) bond length is 2.80 Å. There is one shorter (2.63 Å) and one longer (2.80 Å) Ca(1)-O(2) bond length. There is one shorter (2.24 Å) and one longer (2.97 Å) Ca(1)-O(8) bond length. There are three inequivalent W sites. In the first W site, W(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(6), and one O(7) atom. The W(1)-O(2) bond length is 2.25 Å. The W(1)-O(4) bond length is 2.28 Å. The W(1)-O(6) bond length is 2.31 Å. The W(1)-O(7) bond length is 2.22 Å. In the second W site, W(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Both W(2)-O(1) bond lengths are 2.20 Å. Both W(2)-O(4) bond lengths are 2.24 Å. In the third W site, W(3) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form WO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent P(2)O4 tetrahedra. Both W(3)-O(5) bond lengths are 2.19 Å. Both W(3)-O(6) bond lengths are 2.22 Å. Both W(3)-O(7) 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(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one W(3)O6 octahedra. The corner-sharing octahedral tilt angles are 43°. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.61 Å. The P(1)-O(7) bond length is 1.58 Å. The P(1)-O(8) bond length is 1.51 Å. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent W(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. The P(2)-O(2) bond length is 1.57 Å. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(5) bond length is 1.55 Å. The P(2)-O(6) bond length is 1.58 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1), one W(2), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one W(1), and one P(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ca(1) and one P(2) atom. In the fourth O site, O(4) is bonded to one Ca(1), one W(1), one W(2), and one P(1) atom to form distorted corner-sharing OCaPW2 trigonal pyramids. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one W(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one W(1), one W(3), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one W(1), one W(3), and one P(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent Ca(1) and one P(1) atom.