Materials Data on MnZn3(FeO2)8 by Materials Project

Abstract

MnZn3(FeO2)8 is Spinel-derived structured and crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. Mn2+ is bonded to four equivalent O2- atoms to form MnO4 tetrahedra that share corners with twelve FeO6 octahedra. The corner-sharing octahedra tilt angles range from 59–60°. All Mn–O bond lengths are 2.07 Å. There are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share a cornercorner with one MnO4 tetrahedra, corners with five ZnO4 tetrahedra, and edges with six FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 2.04–2.07 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with two equivalent MnO4 tetrahedra, corners with four ZnO4 tetrahedra, and edges with six FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 2.04–2.07 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four equivalent O2- atoms to form ZnO4 tetrahedra that share corners with twelve FeO6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Zn–O bond lengths are 2.01 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with twelve FeO6 octahedra. The corner-sharing octahedra tilt angles range from 58–59°. There are two shorter (2.01 Å) and two longer (2.02 Å) Zn–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Fe3+ and one Zn2+ atom to form distorted OZnFe3 trigonal pyramids that share corners with twelve OMnFe3 trigonal pyramids and edges with three equivalent OZnFe3 trigonal pyramids. In the second O2- site, O2- is bonded to three equivalent Fe3+ and one Zn2+ atom to form distorted OZnFe3 trigonal pyramids that share corners with twelve OMnFe3 trigonal pyramids and edges with three equivalent OZnFe3 trigonal pyramids. In the third O2- site, O2- is bonded to one Mn2+ and three Fe3+ atoms to form a mixture of distorted corner and edge-sharing OMnFe3 trigonal pyramids. In the fourth O2- site, O2- is bonded to three Fe3+ and one Zn2+ atom to form distorted OZnFe3 trigonal pyramids that share corners with twelve OZnFe3 trigonal pyramids and edges with three OMnFe3 trigonal pyramids.