Materials Data on SmBiRu2O7 by Materials Project
SmRu2BiO7 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Sm3+ is bonded to eight O2- atoms to form distorted SmO8 hexagonal bipyramids that share edges with two equivalent SmO8 hexagonal bipyramids, edges with four equivalent BiO8 hexagonal bipyramids, and edges with six RuO6 octahedra. There are a spread of Sm–O bond distances ranging from 2.23–2.56 Å. There are two inequivalent Ru4+ sites. In the first Ru4+ site, Ru4+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six RuO6 octahedra, edges with two equivalent BiO8 hexagonal bipyramids, and edges with four equivalent SmO8 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 48–49°. There are two shorter (2.00 Å) and four longer (2.02 Å) Ru–O bond lengths. In the second Ru4+ site, Ru4+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six RuO6 octahedra, edges with two equivalent SmO8 hexagonal bipyramids, and edges with four equivalent BiO8 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 47–48°. There are four shorter (2.00 Å) and two longer (2.02 Å) Ru–O bond lengths. Bi3+ is bonded to eight O2- atoms to form distorted BiO8 hexagonal bipyramids that share edges with two equivalent BiO8 hexagonal bipyramids, edges with four equivalent SmO8 hexagonal bipyramids, and edges with six RuO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.26–2.56 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Sm3+, two Ru4+, and one Bi3+ atom. In the second O2- site, O2- is bonded to two equivalent Sm3+ and two equivalent Ru4+ atoms to form distorted OSm2Ru2 tetrahedra that share corners with six OSm2Ru2 tetrahedra and an edgeedge with one OSm2Bi2 tetrahedra. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ru4+ and two equivalent Bi3+ atoms. In the fourth O2- site, O2- is bonded to two equivalent Sm3+ and two equivalent Bi3+ atoms to form a mixture of corner and edge-sharing OSm2Bi2 tetrahedra.