Ta2MnZnO8 crystallizes in the monoclinic C2 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted TaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-55°. In the second Ta site, Ta(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form distorted TaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-55°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-57°. Zn(1) is bonded in a 4-coordinate geometry to one O(6), one O(8), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1), one Mn(1), and one Mn(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ta(2), one Mn(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ta(1) and one Ta(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Ta(2) and one Zn(1) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ta(1) and two equivalent Zn(1) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Zn(1) atom.
Ta2MnZnO8 crystallizes in the monoclinic C2 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted TaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-55°. The Ta(1)-O(1) bond length is 2.04 Å. The Ta(1)-O(2) bond length is 2.25 Å. The Ta(1)-O(3) bond length is 2.01 Å. The Ta(1)-O(5) bond length is 1.90 Å. The Ta(1)-O(7) bond length is 1.90 Å. The Ta(1)-O(8) bond length is 2.06 Å. In the second Ta site, Ta(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form distorted TaO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. The Ta(2)-O(1) bond length is 2.31 Å. The Ta(2)-O(2) bond length is 2.05 Å. The Ta(2)-O(4) bond length is 2.06 Å. The Ta(2)-O(5) bond length is 1.97 Å. The Ta(2)-O(6) bond length is 1.81 Å. The Ta(2)-O(8) bond length is 1.98 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-55°. Both Mn(1)-O(2) bond lengths are 1.89 Å. Both Mn(1)-O(3) bond lengths are 1.99 Å. Both Mn(1)-O(4) bond lengths are 1.96 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-57°. Both Mn(2)-O(1) bond lengths are 1.90 Å. Both Mn(2)-O(3) bond lengths are 1.97 Å. Both Mn(2)-O(4) bond lengths are 1.99 Å. Zn(1) is bonded in a 4-coordinate geometry to one O(6), one O(8), and two equivalent O(7) atoms. The Zn(1)-O(6) bond length is 1.94 Å. The Zn(1)-O(8) bond length is 2.09 Å. There is one shorter (2.00 Å) and one longer (2.01 Å) Zn(1)-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 Ta(1), one Ta(2), and one Mn(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1), one Mn(1), and one Mn(2) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ta(2), one Mn(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ta(1) and one Ta(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Ta(2) and one Zn(1) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ta(1) and two equivalent Zn(1) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Zn(1) atom.