Materials Data on CaNd2Mn3O9 by Materials Project
CaNd2Mn3O9 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.37–2.76 Å. There are two inequivalent Nd3+ sites. In the first Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.39–2.73 Å. In the second Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.39–2.68 Å. There are two inequivalent Mn+3.33+ sites. In the first Mn+3.33+ site, Mn+3.33+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 25–28°. There are a spread of Mn–O bond distances ranging from 1.97–2.02 Å. In the second Mn+3.33+ site, Mn+3.33+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 25–26°. There are a spread of Mn–O bond distances ranging from 1.97–2.03 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to one Ca2+, one Nd3+, and two equivalent Mn+3.33+ atoms to form distorted corner-sharing OCaNdMn2 tetrahedra. In the second O2- site, O2- is bonded to one Ca2+, one Nd3+, and two equivalent Mn+3.33+ atoms to form distorted corner-sharing OCaNdMn2 tetrahedra. In the third O2- site, O2- is bonded to two Nd3+ and two equivalent Mn+3.33+ atoms to form distorted corner-sharing ONd2Mn2 tetrahedra. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Ca2+, two equivalent Nd3+, and two Mn+3.33+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to one Ca2+, two equivalent Nd3+, and two equivalent Mn+3.33+ atoms. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Ca2+, two Nd3+, and two Mn+3.33+ atoms.