Mn7SbAsO12 crystallizes in the orthorhombic Imma space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form MnO4 tetrahedra that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-71°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with four equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. In the third Mn site, Mn(3) is bonded to one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the fourth Mn site, Mn(4) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O6 octahedra, corners with two equivalent As(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. Sb(1) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form SbO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. As(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with six equivalent Mn(3)O6 octahedra, and corners with two equivalent Mn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one Sb(1) atom. In the second O site, O(2) is bonded to one Mn(3), two equivalent Mn(2), and two equivalent Mn(4) atoms to form a mixture of edge and corner-sharing OMn5 square pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(4), two equivalent Mn(3), and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one As(1) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Sb(1) atom.
Mn7SbAsO12 crystallizes in the orthorhombic Imma space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), and two equivalent O(5) atoms to form MnO4 tetrahedra that share corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-71°. The Mn(1)-O(1) bond length is 2.07 Å. The Mn(1)-O(4) bond length is 2.16 Å. Both Mn(1)-O(5) bond lengths are 2.07 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with four equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. Both Mn(2)-O(1) bond lengths are 2.24 Å. Both Mn(2)-O(2) bond lengths are 2.20 Å. Both Mn(2)-O(5) bond lengths are 2.30 Å. In the third Mn site, Mn(3) is bonded to one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. The Mn(3)-O(2) bond length is 2.17 Å. The Mn(3)-O(4) bond length is 2.22 Å. Both Mn(3)-O(3) bond lengths are 2.33 Å. Both Mn(3)-O(5) bond lengths are 2.22 Å. In the fourth Mn site, Mn(4) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O6 octahedra, corners with two equivalent As(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. Both Mn(4)-O(3) bond lengths are 2.34 Å. All Mn(4)-O(2) bond lengths are 2.20 Å. Sb(1) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form SbO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. Both Sb(1)-O(1) bond lengths are 2.02 Å. All Sb(1)-O(5) bond lengths are 2.03 Å. As(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with six equivalent Mn(3)O6 octahedra, and corners with two equivalent Mn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-55°. Both As(1)-O(3) bond lengths are 1.74 Å. Both As(1)-O(4) bond lengths are 1.73 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one Sb(1) atom. In the second O site, O(2) is bonded to one Mn(3), two equivalent Mn(2), and two equivalent Mn(4) atoms to form a mixture of edge and corner-sharing OMn5 square pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(4), two equivalent Mn(3), and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one As(1) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Sb(1) atom.