Materials Data on Eu2MnSbO7 by Materials Project
Eu2MnSbO7 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. there are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded to eight O2- atoms to form distorted EuO8 hexagonal bipyramids that share edges with six EuO8 hexagonal bipyramids, edges with two equivalent MnO6 octahedra, and edges with four equivalent SbO6 octahedra. There are a spread of Eu–O bond distances ranging from 2.25–2.59 Å. In the second Eu3+ site, Eu3+ is bonded to eight O2- atoms to form distorted EuO8 hexagonal bipyramids that share edges with six EuO8 hexagonal bipyramids, edges with two equivalent SbO6 octahedra, and edges with four equivalent MnO6 octahedra. There are a spread of Eu–O bond distances ranging from 2.26–2.60 Å. Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent SbO6 octahedra, and edges with six EuO8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. All Mn–O bond lengths are 2.00 Å. Sb5+ is bonded to six O2- atoms to form SbO6 octahedra that share corners with two equivalent SbO6 octahedra, corners with four equivalent MnO6 octahedra, and edges with six EuO8 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 46–47°. There are four shorter (2.01 Å) and two longer (2.02 Å) Sb–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two equivalent Sb5+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two equivalent Mn3+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Eu3+, one Mn3+, and one Sb5+ atom. In the fourth O2- site, O2- is bonded to four Eu3+ atoms to form corner-sharing OEu4 tetrahedra.