(CaU2P2O17)2O2 crystallizes in the monoclinic Pm space group. The structure consists of one water atom inside a CaU2P2O17 framework. In the CaU2P2O17 framework, Ca(1) is bonded in a 4-coordinate geometry to one O(11), one O(9), and two equivalent O(12) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(2), one O(7), one O(9), and two equivalent O(3) atoms to form UO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. In the second U site, U(2) is bonded to one O(10), one O(4), one O(5), one O(8), and two equivalent O(6) atoms to form UO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent U(1)O6 octahedra and corners with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-38°. In the second P site, P(2) is bonded to one O(1), one O(2), and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent U(1)O6 octahedra and corners with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-39°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one U(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one U(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one U(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one U(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one U(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one U(1) and two equivalent O(12) atoms. In the eighth O site, O(8) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(9) is bonded in a linear geometry to one Ca(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Ca(1) and two equivalent O(14) atoms. In the twelfth O site, O(12) is bonded in an L-shaped geometry to one Ca(1) and one O(7) atom. In the thirteenth O site, O(14) is bonded in a 2-coordinate geometry to one O(11) and one O(14) atom.
(CaU2P2O17)2O2 crystallizes in the monoclinic Pm space group. The structure consists of one water atom inside a CaU2P2O17 framework. In the CaU2P2O17 framework, Ca(1) is bonded in a 4-coordinate geometry to one O(11), one O(9), and two equivalent O(12) atoms. The Ca(1)-O(11) bond length is 2.56 Å. The Ca(1)-O(9) bond length is 2.22 Å. Both Ca(1)-O(12) bond lengths are 2.30 Å. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(2), one O(7), one O(9), and two equivalent O(3) atoms to form UO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The U(1)-O(1) bond length is 2.21 Å. The U(1)-O(2) bond length is 2.19 Å. The U(1)-O(7) bond length is 2.51 Å. The U(1)-O(9) bond length is 1.91 Å. Both U(1)-O(3) bond lengths are 2.19 Å. In the second U site, U(2) is bonded to one O(10), one O(4), one O(5), one O(8), and two equivalent O(6) atoms to form UO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The U(2)-O(10) bond length is 1.82 Å. The U(2)-O(4) bond length is 2.26 Å. The U(2)-O(5) bond length is 2.25 Å. The U(2)-O(8) bond length is 1.84 Å. Both U(2)-O(6) bond lengths are 2.25 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent U(1)O6 octahedra and corners with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-38°. The P(1)-O(4) bond length is 1.53 Å. The P(1)-O(5) bond length is 1.53 Å. Both P(1)-O(3) bond lengths are 1.57 Å. In the second P site, P(2) is bonded to one O(1), one O(2), and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent U(1)O6 octahedra and corners with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-39°. The P(2)-O(1) bond length is 1.58 Å. The P(2)-O(2) bond length is 1.57 Å. Both P(2)-O(6) bond lengths are 1.53 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one U(1) and one P(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one U(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one U(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one U(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one U(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one U(1) and two equivalent O(12) atoms. Both O(7)-O(12) bond lengths are 1.40 Å. In the eighth O site, O(8) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(9) is bonded in a linear geometry to one Ca(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Ca(1) and two equivalent O(14) atoms. Both O(11)-O(14) bond lengths are 1.46 Å. In the twelfth O site, O(12) is bonded in an L-shaped geometry to one Ca(1) and one O(7) atom. In the thirteenth O site, O(14) is bonded in a 2-coordinate geometry to one O(11) and one O(14) atom. The O(14)-O(14) bond length is 1.47 Å.