Materials Data on Sr4Mn3BO10 by Materials Project
Sr4Mn3BO3O7 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.64–3.01 Å. In the second Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.59–2.79 Å. There are three inequivalent Mn3+ sites. In the first Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent MnO6 octahedra and corners with two equivalent MnO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 9°. There are a spread of Mn–O bond distances ranging from 1.92–2.37 Å. In the second Mn3+ site, Mn3+ is bonded to five O2- atoms to form MnO5 trigonal bipyramids that share corners with two equivalent MnO6 octahedra and corners with two equivalent MnO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 1°. There are a spread of Mn–O bond distances ranging from 1.93–2.06 Å. In the third Mn3+ site, Mn3+ is bonded in a square co-planar geometry to four O2- atoms. There is three shorter (1.92 Å) and one longer (1.93 Å) Mn–O bond length. B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.40 Å) and one longer (1.41 Å) B–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Sr2+ and two Mn3+ atoms to form a mixture of distorted edge and corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded in a distorted linear geometry to four Sr2+ and two Mn3+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to four Sr2+ and two equivalent Mn3+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to four Sr2+ and two equivalent Mn3+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to four Sr2+ and two equivalent Mn3+ atoms. In the sixth O2- site, O2- is bonded to four equivalent Sr2+ and two Mn3+ atoms to form a mixture of distorted edge and corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to four equivalent Sr2+, one Mn3+, and one B3+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sr2+ and one B3+ atom.