Ba5Mn5O14 crystallizes in the orthorhombic Ama2 space group. There are three inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(2), one O(4), one O(7), three equivalent O(1), three equivalent O(5), and three equivalent O(6) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(3)O6 octahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Mn(2)O6 octahedra, faces with three equivalent Mn(3)O6 octahedra, and  a faceface with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 8-10°. In the second Ba site, Ba(2) is bonded in a 11-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(8), two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form MnO5 square pyramids that share corners with three equivalent Mn(3)O6 octahedra,  an edgeedge with one Mn(1)O5 square pyramid, and  a faceface with one Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share faces with six equivalent Ba(1)O12 cuboctahedra and faces with two equivalent Mn(3)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(1)O5 square pyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Mn(2)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to two equivalent Ba(2), two equivalent Ba(3), and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to two equivalent Ba(2), two equivalent Ba(3), and two equivalent Mn(1) atoms.
Ba5Mn5O14 crystallizes in the orthorhombic Ama2 space group. There are three inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(2), one O(4), one O(7), three equivalent O(1), three equivalent O(5), and three equivalent O(6) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(3)O6 octahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Mn(2)O6 octahedra, faces with three equivalent Mn(3)O6 octahedra, and  a faceface with one Mn(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 8-10°. The Ba(1)-O(2) bond length is 3.02 Å. The Ba(1)-O(4) bond length is 3.00 Å. The Ba(1)-O(7) bond length is 2.97 Å. There are two shorter (2.86 Å) and one longer (2.91 Å) Ba(1)-O(1) bond length. There are a spread of Ba(1)-O(5) bond distances ranging from 2.86-2.94 Å. There are a spread of Ba(1)-O(6) bond distances ranging from 2.85-2.94 Å. In the second Ba site, Ba(2) is bonded in a 11-coordinate geometry to one O(1), one O(3), one O(5), one O(6), one O(8), two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms. The Ba(2)-O(1) bond length is 2.73 Å. The Ba(2)-O(3) bond length is 3.24 Å. The Ba(2)-O(5) bond length is 2.80 Å. The Ba(2)-O(6) bond length is 2.83 Å. The Ba(2)-O(8) bond length is 3.22 Å. There is one shorter (2.84 Å) and one longer (2.89 Å) Ba(2)-O(2) bond length. There is one shorter (2.85 Å) and one longer (2.90 Å) Ba(2)-O(4) bond length. Both Ba(2)-O(7) bond lengths are 2.86 Å. In the third Ba site, Ba(3) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms. Both Ba(3)-O(2) bond lengths are 2.83 Å. There is one shorter (2.72 Å) and one longer (3.01 Å) Ba(3)-O(3) bond length. Both Ba(3)-O(4) bond lengths are 2.85 Å. Both Ba(3)-O(7) bond lengths are 2.86 Å. There is one shorter (2.74 Å) and one longer (3.02 Å) Ba(3)-O(8) bond length. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form MnO5 square pyramids that share corners with three equivalent Mn(3)O6 octahedra,  an edgeedge with one Mn(1)O5 square pyramid, and  a faceface with one Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-6°. The Mn(1)-O(2) bond length is 1.94 Å. The Mn(1)-O(3) bond length is 1.91 Å. The Mn(1)-O(4) bond length is 1.94 Å. The Mn(1)-O(7) bond length is 1.98 Å. The Mn(1)-O(8) bond length is 1.91 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share faces with six equivalent Ba(1)O12 cuboctahedra and faces with two equivalent Mn(3)O6 octahedra. Both Mn(2)-O(1) bond lengths are 1.90 Å. Both Mn(2)-O(5) bond lengths are 1.89 Å. Both Mn(2)-O(6) bond lengths are 1.90 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(1)O5 square pyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Mn(2)O6 octahedra. The Mn(3)-O(1) bond length is 1.99 Å. The Mn(3)-O(2) bond length is 1.94 Å. The Mn(3)-O(4) bond length is 1.93 Å. The Mn(3)-O(5) bond length is 1.94 Å. The Mn(3)-O(6) bond length is 1.94 Å. The Mn(3)-O(7) bond length is 1.86 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to two equivalent Ba(2), two equivalent Ba(3), and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Ba(2), three equivalent Ba(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a distorted linear geometry to one Ba(1), one Ba(3), two equivalent Ba(2), one Mn(1), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to two equivalent Ba(2), two equivalent Ba(3), and two equivalent Mn(1) atoms.