BaAuO2 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing BaO6 octahedra. The corner-sharing octahedral tilt angles range from 22-45°. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a linear geometry to two equivalent O(1) atoms. In the second Au site, Au(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Au(1), and one Au(2) atom. In the second O site, O(2) is bonded to four equivalent Ba(1) and one Au(2) atom to form a mixture of distorted corner and edge-sharing OBa4Au square pyramids.
BaAuO2 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing BaO6 octahedra. The corner-sharing octahedral tilt angles range from 22-45°. Both Ba(1)-O(1) bond lengths are 2.80 Å. There are two shorter (2.75 Å) and two longer (2.77 Å) Ba(1)-O(2) bond lengths. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Au(1)-O(1) bond lengths are 2.05 Å. In the second Au site, Au(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Au(2)-O(1) bond lengths are 2.09 Å. Both Au(2)-O(2) bond lengths are 2.06 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Au(1), and one Au(2) atom. In the second O site, O(2) is bonded to four equivalent Ba(1) and one Au(2) atom to form a mixture of distorted corner and edge-sharing OBa4Au square pyramids.