Materials Data on NdFe6Bi(BO3)8 by Materials Project
NdFe6Bi(BO3)8 is Calcite-derived structured and crystallizes in the trigonal R32 space group. The structure is three-dimensional. Nd3+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Nd–O bond lengths are 2.41 Å. There are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form edge-sharing FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.95–2.00 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form edge-sharing FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.98–2.07 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.39 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.38 Å) and one longer (1.39 Å) B–O bond length. Bi3+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Bi–O bond lengths are 2.42 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Fe3+ and one B3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Fe3+ and one B3+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Nd3+, one Fe3+, and one B3+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Fe3+, one B3+, and one Bi3+ atom.