KMnSn3O8 crystallizes in the triclinic P1 space group. K(1) is bonded in a distorted body-centered cubic geometry to two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. Mn(1) is bonded to one O(1), one O(5), two equivalent O(4), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. In the second Sn site, Sn(2) is bonded to one O(3), one O(7), two equivalent O(1), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. In the third Sn site, Sn(3) is bonded to one O(4), one O(8), two equivalent O(2), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Sn(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sn(2) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Sn(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent K(1), one Mn(1), and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to two equivalent K(1), two equivalent Mn(1), and one Sn(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to two equivalent K(1), one Sn(2), and two equivalent Sn(3) atoms. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent K(1), one Sn(3), and two equivalent Sn(2) atoms.
KMnSn3O8 crystallizes in the triclinic P1 space group. K(1) is bonded in a distorted body-centered cubic geometry to two equivalent O(5), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. There is one shorter (3.13 Å) and one longer (3.22 Å) K(1)-O(5) bond length. There is one shorter (2.82 Å) and one longer (2.95 Å) K(1)-O(6) bond length. There is one shorter (2.93 Å) and one longer (3.14 Å) K(1)-O(7) bond length. There is one shorter (3.17 Å) and one longer (3.22 Å) K(1)-O(8) bond length. Mn(1) is bonded to one O(1), one O(5), two equivalent O(4), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. The Mn(1)-O(1) bond length is 1.94 Å. The Mn(1)-O(5) bond length is 2.02 Å. There is one shorter (1.91 Å) and one longer (2.13 Å) Mn(1)-O(4) bond length. There is one shorter (1.93 Å) and one longer (2.36 Å) Mn(1)-O(6) bond length. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. The Sn(1)-O(2) bond length is 2.05 Å. The Sn(1)-O(6) bond length is 2.03 Å. There is one shorter (2.07 Å) and one longer (2.11 Å) Sn(1)-O(3) bond length. There is one shorter (2.09 Å) and one longer (2.11 Å) Sn(1)-O(5) bond length. In the second Sn site, Sn(2) is bonded to one O(3), one O(7), two equivalent O(1), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-52°. The Sn(2)-O(3) bond length is 2.03 Å. The Sn(2)-O(7) bond length is 2.10 Å. Both Sn(2)-O(1) bond lengths are 2.04 Å. There is one shorter (2.13 Å) and one longer (2.14 Å) Sn(2)-O(8) bond length. In the third Sn site, Sn(3) is bonded to one O(4), one O(8), two equivalent O(2), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, edges with two equivalent Sn(2)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. The Sn(3)-O(4) bond length is 1.98 Å. The Sn(3)-O(8) bond length is 2.12 Å. There is one shorter (2.07 Å) and one longer (2.08 Å) Sn(3)-O(2) bond length. There is one shorter (2.13 Å) and one longer (2.14 Å) Sn(3)-O(7) bond length. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Sn(2) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sn(2) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one Sn(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent K(1), one Mn(1), and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to two equivalent K(1), two equivalent Mn(1), and one Sn(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to two equivalent K(1), one Sn(2), and two equivalent Sn(3) atoms. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent K(1), one Sn(3), and two equivalent Sn(2) atoms.