BaMnO4 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 12-coordinate geometry to three equivalent O(1), three equivalent O(2), and six equivalent O(3) atoms. Mn(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom.
BaMnO4 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 12-coordinate geometry to three equivalent O(1), three equivalent O(2), and six equivalent O(3) atoms. There is one shorter (2.77 Å) and two longer (3.23 Å) Ba(1)-O(1) bond lengths. There is one shorter (2.78 Å) and two longer (3.14 Å) Ba(1)-O(2) bond lengths. There are a spread of Ba(1)-O(3) bond distances ranging from 2.83-2.91 Å. Mn(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. The Mn(1)-O(1) bond length is 1.63 Å. The Mn(1)-O(2) bond length is 1.64 Å. Both Mn(1)-O(3) bond lengths are 1.65 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Ba(1) and one Mn(1) atom.