MnSn3(PO4)4 crystallizes in the monoclinic Pm space group. Mn(1) is bonded to one O(3), one O(8), two equivalent O(11), and two equivalent O(9) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Sn(2)O6 pentagonal pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(5), two equivalent O(10), and two equivalent O(12) atoms to form SnO6 pentagonal pyramids that share corners with four equivalent Sn(3)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-58°. In the second Sn site, Sn(2) is bonded to one O(4), one O(7), two equivalent O(11), and two equivalent O(9) atoms to form SnO6 pentagonal pyramids that share corners with four equivalent Mn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(10), and two equivalent O(12) atoms to form distorted SnO6 octahedra that share corners with four equivalent Sn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(7), and two equivalent O(9) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O6 octahedra,  a cornercorner with one Sn(2)O6 pentagonal pyramid, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 37°. In the second P site, P(2) is bonded to one O(4), one O(6), and two equivalent O(10) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O6 octahedra,  a cornercorner with one Sn(2)O6 pentagonal pyramid, corners with two equivalent Sn(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 58°. In the third P site, P(3) is bonded to one O(3), one O(5), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one Sn(1)O6 pentagonal pyramid, corners with two equivalent Sn(2)O6 pentagonal pyramids, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. In the fourth P site, P(4) is bonded to one O(2), one O(8), and two equivalent O(12) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(3)O6 octahedra,  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one Sn(1)O6 pentagonal pyramid, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 67°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sn(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Sn(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(3) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(1), one Sn(2), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sn(1), one Sn(3), and one P(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Sn(2), and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1), one Sn(3), and one P(4) atom.
MnSn3(PO4)4 crystallizes in the monoclinic Pm space group. Mn(1) is bonded to one O(3), one O(8), two equivalent O(11), and two equivalent O(9) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Sn(2)O6 pentagonal pyramids,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. The Mn(1)-O(3) bond length is 2.12 Å. The Mn(1)-O(8) bond length is 2.16 Å. Both Mn(1)-O(11) bond lengths are 2.39 Å. Both Mn(1)-O(9) bond lengths are 2.22 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(5), two equivalent O(10), and two equivalent O(12) atoms to form SnO6 pentagonal pyramids that share corners with four equivalent Sn(3)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-58°. The Sn(1)-O(2) bond length is 2.06 Å. The Sn(1)-O(5) bond length is 2.06 Å. Both Sn(1)-O(10) bond lengths are 2.11 Å. Both Sn(1)-O(12) bond lengths are 2.16 Å. In the second Sn site, Sn(2) is bonded to one O(4), one O(7), two equivalent O(11), and two equivalent O(9) atoms to form SnO6 pentagonal pyramids that share corners with four equivalent Mn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The Sn(2)-O(4) bond length is 2.02 Å. The Sn(2)-O(7) bond length is 2.03 Å. Both Sn(2)-O(11) bond lengths are 2.15 Å. Both Sn(2)-O(9) bond lengths are 2.18 Å. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(10), and two equivalent O(12) atoms to form distorted SnO6 octahedra that share corners with four equivalent Sn(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The Sn(3)-O(1) bond length is 2.32 Å. The Sn(3)-O(6) bond length is 2.35 Å. Both Sn(3)-O(10) bond lengths are 2.56 Å. Both Sn(3)-O(12) bond lengths are 2.40 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(7), and two equivalent O(9) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O6 octahedra,  a cornercorner with one Sn(2)O6 pentagonal pyramid, corners with two equivalent Mn(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(2)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 37°. The P(1)-O(1) bond length is 1.50 Å. The P(1)-O(7) bond length is 1.56 Å. Both P(1)-O(9) bond lengths are 1.59 Å. In the second P site, P(2) is bonded to one O(4), one O(6), and two equivalent O(10) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O6 octahedra,  a cornercorner with one Sn(2)O6 pentagonal pyramid, corners with two equivalent Sn(1)O6 pentagonal pyramids, and  an edgeedge with one Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 58°. The P(2)-O(4) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.51 Å. Both P(2)-O(10) bond lengths are 1.59 Å. In the third P site, P(3) is bonded to one O(3), one O(5), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one Sn(1)O6 pentagonal pyramid, corners with two equivalent Sn(2)O6 pentagonal pyramids, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. The P(3)-O(3) bond length is 1.51 Å. The P(3)-O(5) bond length is 1.57 Å. Both P(3)-O(11) bond lengths are 1.59 Å. In the fourth P site, P(4) is bonded to one O(2), one O(8), and two equivalent O(12) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(3)O6 octahedra,  a cornercorner with one Mn(1)O6 pentagonal pyramid,  a cornercorner with one Sn(1)O6 pentagonal pyramid, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 67°. The P(4)-O(2) bond length is 1.56 Å. The P(4)-O(8) bond length is 1.50 Å. Both P(4)-O(12) bond lengths are 1.60 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Sn(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Sn(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(3) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(1), one Sn(2), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sn(1), one Sn(3), and one P(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Mn(1), one Sn(2), and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1), one Sn(3), and one P(4) atom.