BaOsO2 crystallizes in the tetragonal I4_1/amd space group. Ba(1) is bonded to six equivalent O(1) atoms to form edge-sharing BaO6 octahedra. Os(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(1) atoms. O(1) is bonded to three equivalent Ba(1) and two equivalent Os(1) atoms to form a mixture of distorted corner and edge-sharing OBa3Os2 square pyramids.
BaOsO2 crystallizes in the tetragonal I4_1/amd space group. Ba(1) is bonded to six equivalent O(1) atoms to form edge-sharing BaO6 octahedra. There are four shorter (2.67 Å) and two longer (2.78 Å) Ba(1)-O(1) bond lengths. Os(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(1) atoms. All Os(1)-O(1) bond lengths are 2.08 Å. O(1) is bonded to three equivalent Ba(1) and two equivalent Os(1) atoms to form a mixture of distorted corner and edge-sharing OBa3Os2 square pyramids.