MnZnP2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(12), one O(14), one O(3), and one O(7) atom to form distorted MnO5 square pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Mn(2)O5 square pyramid. In the second Mn site, Mn(2) is bonded to one O(11), one O(12), one O(13), one O(4), and one O(8) atom to form MnO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent Zn(2)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 square pyramid. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(10), one O(3), one O(5), one O(7), and one O(9) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O5 square pyramids,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Zn(2)O5 trigonal bipyramid. In the second Zn site, Zn(2) is bonded to one O(10), one O(4), one O(6), one O(8), and one O(9) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent Mn(2)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(12), one O(2), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O5 square pyramid, corners with two equivalent Mn(1)O5 square pyramids,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Zn(2)O5 trigonal bipyramid, and corners with two equivalent Zn(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(1), one O(11), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid, corners with two equivalent Mn(2)O5 square pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid, and corners with two equivalent Zn(2)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(1), one O(14), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Zn(2)O5 trigonal bipyramids. In the fourth P site, P(4) is bonded to one O(13), one O(2), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Zn(1)O5 trigonal bipyramids. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(2), one Zn(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one P(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(2), one Zn(2), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(3) atom.
MnZnP2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(12), one O(14), one O(3), and one O(7) atom to form distorted MnO5 square pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Mn(2)O5 square pyramid. The Mn(1)-O(11) bond length is 2.17 Å. The Mn(1)-O(12) bond length is 2.25 Å. The Mn(1)-O(14) bond length is 2.03 Å. The Mn(1)-O(3) bond length is 2.26 Å. The Mn(1)-O(7) bond length is 2.15 Å. In the second Mn site, Mn(2) is bonded to one O(11), one O(12), one O(13), one O(4), and one O(8) atom to form MnO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent Zn(2)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 square pyramid. The Mn(2)-O(11) bond length is 2.25 Å. The Mn(2)-O(12) bond length is 2.17 Å. The Mn(2)-O(13) bond length is 2.03 Å. The Mn(2)-O(4) bond length is 2.26 Å. The Mn(2)-O(8) bond length is 2.15 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(10), one O(3), one O(5), one O(7), and one O(9) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O5 square pyramids,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Zn(2)O5 trigonal bipyramid. The Zn(1)-O(10) bond length is 2.04 Å. The Zn(1)-O(3) bond length is 2.27 Å. The Zn(1)-O(5) bond length is 1.98 Å. The Zn(1)-O(7) bond length is 2.17 Å. The Zn(1)-O(9) bond length is 2.17 Å. In the second Zn site, Zn(2) is bonded to one O(10), one O(4), one O(6), one O(8), and one O(9) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent Mn(2)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. The Zn(2)-O(10) bond length is 2.17 Å. The Zn(2)-O(4) bond length is 2.27 Å. The Zn(2)-O(6) bond length is 1.98 Å. The Zn(2)-O(8) bond length is 2.16 Å. The Zn(2)-O(9) bond length is 2.04 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(12), one O(2), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O5 square pyramid, corners with two equivalent Mn(1)O5 square pyramids,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Zn(2)O5 trigonal bipyramid, and corners with two equivalent Zn(1)O5 trigonal bipyramids. The P(1)-O(10) bond length is 1.55 Å. The P(1)-O(12) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.60 Å. The P(1)-O(3) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(1), one O(11), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid, corners with two equivalent Mn(2)O5 square pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid, and corners with two equivalent Zn(2)O5 trigonal bipyramids. The P(2)-O(1) bond length is 1.60 Å. The P(2)-O(11) bond length is 1.53 Å. The P(2)-O(4) bond length is 1.54 Å. The P(2)-O(9) bond length is 1.55 Å. In the third P site, P(3) is bonded to one O(1), one O(14), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Zn(2)O5 trigonal bipyramids. The P(3)-O(1) bond length is 1.64 Å. The P(3)-O(14) bond length is 1.51 Å. The P(3)-O(6) bond length is 1.54 Å. The P(3)-O(8) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one O(13), one O(2), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O5 square pyramid,  a cornercorner with one Mn(2)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Zn(1)O5 trigonal bipyramids. The P(4)-O(13) bond length is 1.50 Å. The P(4)-O(2) bond length is 1.64 Å. The P(4)-O(5) bond length is 1.54 Å. The P(4)-O(7) bond length is 1.55 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(2), one Zn(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(1), and one P(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(2), one Zn(2), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(3) atom.