MnSiO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(5), and one O(6) atom. In the second Mn site, Mn(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with three equivalent Si(1)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-61°. In the second Si site, Si(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-61°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one Si(2) atom. In the second O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one Si(1) atom. In the sixth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2) atoms.
MnSiO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(5), and one O(6) atom. The Mn(1)-O(2) bond length is 2.04 Å. The Mn(1)-O(3) bond length is 2.14 Å. The Mn(1)-O(5) bond length is 2.14 Å. The Mn(1)-O(6) bond length is 2.04 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with three equivalent Si(1)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. The Mn(2)-O(2) bond length is 2.13 Å. The Mn(2)-O(6) bond length is 2.13 Å. There is one shorter (2.14 Å) and one longer (2.28 Å) Mn(2)-O(3) bond length. There is one shorter (2.14 Å) and one longer (2.28 Å) Mn(2)-O(5) bond length. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-61°. The Si(1)-O(2) bond length is 1.61 Å. The Si(1)-O(3) bond length is 1.62 Å. Both Si(1)-O(1) bond lengths are 1.65 Å. In the second Si site, Si(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-61°. The Si(2)-O(5) bond length is 1.62 Å. The Si(2)-O(6) bond length is 1.61 Å. There is one shorter (1.64 Å) and one longer (1.65 Å) Si(2)-O(4) bond length. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one Si(2) atom. In the second O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one Si(1) atom. In the sixth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2) atoms.