Ba3SmIr2O9 crystallizes in the hexagonal P6_3/mmc space group. The structure consists of two Ir2O3 clusters inside a Ba3SmO6 framework. In each Ir2O3 cluster, Ir(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. O(1) is bonded in a distorted L-shaped geometry to two equivalent Ir(1) atoms. In the Ba3SmO6 framework, there are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a distorted trigonal planar geometry to three equivalent O(2) atoms. Sm(1) is bonded in a distorted octahedral geometry to six equivalent O(2) atoms. O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Sm(1) atom.
Ba3SmIr2O9 crystallizes in the hexagonal P6_3/mmc space group. The structure consists of two Ir2O3 clusters inside a Ba3SmO6 framework. In each Ir2O3 cluster, Ir(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. All Ir(1)-O(1) bond lengths are 1.98 Å. O(1) is bonded in a distorted L-shaped geometry to two equivalent Ir(1) atoms. In the Ba3SmO6 framework, there are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. All Ba(1)-O(2) bond lengths are 2.75 Å. In the second Ba site, Ba(2) is bonded in a distorted trigonal planar geometry to three equivalent O(2) atoms. All Ba(2)-O(2) bond lengths are 2.38 Å. Sm(1) is bonded in a distorted octahedral geometry to six equivalent O(2) atoms. All Sm(1)-O(2) bond lengths are 2.31 Å. O(2) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Sm(1) atom.