MnFe3Sn2(PO4)6 crystallizes in the trigonal R3 space group. Mn(1) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(6) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  a faceface with one Sn(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to three equivalent O(7) and three equivalent O(8) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to three equivalent O(2) and three equivalent O(6) atoms to form distorted SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  a faceface with one Fe(1)O6 octahedra. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to three equivalent O(4) and three equivalent O(7) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-56°. In the second P site, P(2) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-50°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(2) and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Fe(2), one Sn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mn(1), one Sn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Fe(3), one Sn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Fe(3) and one P(1) atom.
MnFe3Sn2(PO4)6 crystallizes in the trigonal R3 space group. Mn(1) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(6) atoms. All Mn(1)-O(3) bond lengths are 2.04 Å. All Mn(1)-O(6) bond lengths are 2.32 Å. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(2) and three equivalent O(5) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  a faceface with one Sn(1)O6 octahedra. All Fe(1)-O(2) bond lengths are 2.23 Å. All Fe(1)-O(5) bond lengths are 1.95 Å. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. All Fe(2)-O(1) bond lengths are 1.92 Å. All Fe(2)-O(4) bond lengths are 2.09 Å. In the third Fe site, Fe(3) is bonded to three equivalent O(7) and three equivalent O(8) atoms to form distorted FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. All Fe(3)-O(7) bond lengths are 2.15 Å. All Fe(3)-O(8) bond lengths are 1.93 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to three equivalent O(2) and three equivalent O(6) atoms to form distorted SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  a faceface with one Fe(1)O6 octahedra. All Sn(1)-O(2) bond lengths are 2.15 Å. All Sn(1)-O(6) bond lengths are 2.13 Å. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to three equivalent O(4) and three equivalent O(7) atoms. All Sn(2)-O(4) bond lengths are 2.29 Å. All Sn(2)-O(7) bond lengths are 2.28 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-56°. The P(1)-O(2) bond length is 1.60 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(4) bond length is 1.57 Å. The P(1)-O(8) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-50°. The P(2)-O(1) bond length is 1.51 Å. The P(2)-O(5) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.58 Å. The P(2)-O(7) bond length is 1.57 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(2) and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Fe(2), one Sn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mn(1), one Sn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Fe(3), one Sn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Fe(3) and one P(1) atom.