CaMn3P3O13 crystallizes in the monoclinic P2_1/m space group. Ca(1) is bonded in a 7-coordinate geometry to one O(9), two equivalent O(2), two equivalent O(4), and two equivalent O(8) atoms. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(5), one O(6), one O(9), and two equivalent O(8) atoms to form distorted MnO6 pentagonal pyramids that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(7), and two equivalent O(2) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 pentagonal pyramids, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Mn(3)O6 octahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(5), one O(7), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid and corners with three equivalent Mn(2)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(10), one O(3), and two equivalent O(8) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  a cornercorner with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 53°. In the third P site, P(3) is bonded to one O(1), one O(9), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 50°. There are ten inequivalent O sites. In the first O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Mn(3) and one P(2) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(3) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(1) atom. In the fourth O site, O(3) is bonded in a linear geometry to one Mn(2) and one P(2) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(3), and one P(3) atom. In the sixth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the seventh O site, O(6) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the eighth O site, O(7) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(1), and one P(2) atom. In the tenth O site, O(9) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(1), and one P(3) atom.
CaMn3P3O13 crystallizes in the monoclinic P2_1/m space group. Ca(1) is bonded in a 7-coordinate geometry to one O(9), two equivalent O(2), two equivalent O(4), and two equivalent O(8) atoms. The Ca(1)-O(9) bond length is 2.46 Å. Both Ca(1)-O(2) bond lengths are 2.60 Å. Both Ca(1)-O(4) bond lengths are 2.41 Å. Both Ca(1)-O(8) bond lengths are 2.52 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(5), one O(6), one O(9), and two equivalent O(8) atoms to form distorted MnO6 pentagonal pyramids that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. The Mn(1)-O(1) bond length is 2.24 Å. The Mn(1)-O(5) bond length is 1.95 Å. The Mn(1)-O(6) bond length is 2.01 Å. The Mn(1)-O(9) bond length is 2.28 Å. Both Mn(1)-O(8) bond lengths are 1.95 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(7), and two equivalent O(2) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The Mn(2)-O(1) bond length is 1.96 Å. The Mn(2)-O(3) bond length is 1.94 Å. The Mn(2)-O(7) bond length is 2.05 Å. Both Mn(2)-O(2) bond lengths are 1.95 Å. In the third Mn site, Mn(3) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 pentagonal pyramids, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Mn(3)O6 octahedra. Both Mn(3)-O(10) bond lengths are 2.16 Å. Both Mn(3)-O(4) bond lengths are 2.08 Å. Both Mn(3)-O(6) bond lengths are 1.96 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(5), one O(7), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid and corners with three equivalent Mn(2)O5 trigonal bipyramids. The P(1)-O(5) bond length is 1.55 Å. The P(1)-O(7) bond length is 1.51 Å. Both P(1)-O(2) bond lengths are 1.57 Å. In the second P site, P(2) is bonded to one O(10), one O(3), and two equivalent O(8) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  a cornercorner with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 53°. The P(2)-O(10) bond length is 1.55 Å. The P(2)-O(3) bond length is 1.51 Å. Both P(2)-O(8) bond lengths are 1.56 Å. In the third P site, P(3) is bonded to one O(1), one O(9), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 50°. The P(3)-O(1) bond length is 1.57 Å. The P(3)-O(9) bond length is 1.54 Å. Both P(3)-O(4) bond lengths are 1.55 Å. There are ten inequivalent O sites. In the first O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Mn(3) and one P(2) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(3) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(1) atom. In the fourth O site, O(3) is bonded in a linear geometry to one Mn(2) and one P(2) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(3), and one P(3) atom. In the sixth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the seventh O site, O(6) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the eighth O site, O(7) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(1), and one P(2) atom. In the tenth O site, O(9) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(1), and one P(3) atom.