Sr2SmBiO6 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. Sm(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SmO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-34°. Bi(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share corners with six equivalent Sm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-34°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), one Sm(1), and one Bi(1) atom to form distorted corner-sharing OSr2SmBi tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Sm(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Sm(1), and one Bi(1) atom.
Sr2SmBiO6 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. There is one shorter (2.54 Å) and one longer (2.62 Å) Sr(1)-O(1) bond length. There are a spread of Sr(1)-O(2) bond distances ranging from 2.57-3.10 Å. There are a spread of Sr(1)-O(3) bond distances ranging from 2.56-3.00 Å. Sm(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SmO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-34°. Both Sm(1)-O(1) bond lengths are 2.32 Å. Both Sm(1)-O(2) bond lengths are 2.32 Å. Both Sm(1)-O(3) bond lengths are 2.31 Å. Bi(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share corners with six equivalent Sm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-34°. Both Bi(1)-O(1) bond lengths are 2.15 Å. Both Bi(1)-O(2) bond lengths are 2.16 Å. Both Bi(1)-O(3) bond lengths are 2.14 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), one Sm(1), and one Bi(1) atom to form distorted corner-sharing OSr2SmBi tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Sm(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Sm(1), and one Bi(1) atom.