CaMn2(P2O7)2 crystallizes in the triclinic P1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(14), one O(3), one O(6), and one O(9) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(2), and one O(4) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(11), one O(13), one O(14), one O(3), and one O(5) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and corners with two equivalent Mn(2)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(12), one O(4), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and corners with two equivalent Mn(1)O5 trigonal bipyramids. In the fourth P site, P(4) is bonded to one O(13), one O(14), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Mn(2)O5 trigonal bipyramids. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ca(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one P(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(2) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom.
CaMn2(P2O7)2 crystallizes in the triclinic P1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(14), one O(3), one O(6), and one O(9) atom. The Ca(1)-O(1) bond length is 2.39 Å. The Ca(1)-O(13) bond length is 2.54 Å. The Ca(1)-O(14) bond length is 2.81 Å. The Ca(1)-O(3) bond length is 2.47 Å. The Ca(1)-O(6) bond length is 2.27 Å. The Ca(1)-O(9) bond length is 2.27 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(2), and one O(4) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Mn(1)-O(1) bond length is 2.19 Å. The Mn(1)-O(10) bond length is 1.97 Å. The Mn(1)-O(12) bond length is 1.90 Å. The Mn(1)-O(2) bond length is 1.93 Å. The Mn(1)-O(4) bond length is 1.91 Å. In the second Mn site, Mn(2) is bonded to one O(11), one O(13), one O(14), one O(3), and one O(5) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. The Mn(2)-O(11) bond length is 1.92 Å. The Mn(2)-O(13) bond length is 1.97 Å. The Mn(2)-O(14) bond length is 2.12 Å. The Mn(2)-O(3) bond length is 1.99 Å. The Mn(2)-O(5) bond length is 1.94 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(8) bond length is 1.64 Å. The P(1)-O(9) bond length is 1.51 Å. In the second P site, P(2) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and corners with two equivalent Mn(2)O5 trigonal bipyramids. The P(2)-O(10) bond length is 1.52 Å. The P(2)-O(11) bond length is 1.54 Å. The P(2)-O(3) bond length is 1.55 Å. The P(2)-O(7) bond length is 1.60 Å. In the third P site, P(3) is bonded to one O(12), one O(4), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, and corners with two equivalent Mn(1)O5 trigonal bipyramids. The P(3)-O(12) bond length is 1.53 Å. The P(3)-O(4) bond length is 1.53 Å. The P(3)-O(5) bond length is 1.54 Å. The P(3)-O(8) bond length is 1.60 Å. In the fourth P site, P(4) is bonded to one O(13), one O(14), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Mn(2)O5 trigonal bipyramids. The P(4)-O(13) bond length is 1.58 Å. The P(4)-O(14) bond length is 1.52 Å. The P(4)-O(6) bond length is 1.50 Å. The P(4)-O(7) bond length is 1.65 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ca(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one P(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mn(2) and one P(2) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to one Ca(1), one Mn(2), and one P(4) atom.