Ba2Mn3(AsO)2 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Mn site, Mn(2) is bonded to four equivalent As(1) atoms to form a mixture of edge and corner-sharing MnAs4 tetrahedra. As(1) is bonded in a 8-coordinate geometry to four equivalent Ba(1) and four equivalent Mn(2) atoms. O(1) is bonded to four equivalent Ba(1) and two equivalent Mn(1) atoms to form a mixture of edge, face, and corner-sharing OBa4Mn2 octahedra. The corner-sharing octahedra are not tilted.
Ba2Mn3(AsO)2 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. All Ba(1)-As(1) bond lengths are 3.52 Å. All Ba(1)-O(1) bond lengths are 2.81 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Mn(1)-O(1) bond lengths are 2.18 Å. In the second Mn site, Mn(2) is bonded to four equivalent As(1) atoms to form a mixture of edge and corner-sharing MnAs4 tetrahedra. All Mn(2)-As(1) bond lengths are 2.70 Å. As(1) is bonded in a 8-coordinate geometry to four equivalent Ba(1) and four equivalent Mn(2) atoms. O(1) is bonded to four equivalent Ba(1) and two equivalent Mn(1) atoms to form a mixture of edge, face, and corner-sharing OBa4Mn2 octahedra. The corner-sharing octahedra are not tilted.