Materials Data on Mn3FeSn2(PO4)6 by Materials Project
Mn3FeSn2(PO4)6 crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent Mn+2.33+ sites. In the first Mn+2.33+ site, Mn+2.33+ is bonded to six O2- atoms to form distorted MnO6 pentagonal pyramids that share corners with six PO4 tetrahedra and a faceface with one SnO6 octahedra. There are three shorter (2.01 Å) and three longer (2.23 Å) Mn–O bond lengths. In the second Mn+2.33+ site, Mn+2.33+ is bonded in a 6-coordinate geometry to six O2- atoms. There are three shorter (2.04 Å) and three longer (2.33 Å) Mn–O bond lengths. In the third Mn+2.33+ site, Mn+2.33+ is bonded to six O2- atoms to form distorted MnO6 pentagonal pyramids that share corners with six PO4 tetrahedra and a faceface with one SnO6 octahedra. There are three shorter (2.02 Å) and three longer (2.23 Å) Mn–O bond lengths. Fe3+ is bonded to six O2- atoms to form distorted FeO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one SnO6 octahedra. There are three shorter (1.93 Å) and three longer (2.16 Å) Fe–O bond lengths. There are two inequivalent Sn4+ sites. In the first Sn4+ site, Sn4+ is bonded to six O2- atoms to form distorted SnO6 octahedra that share corners with six PO4 tetrahedra, a faceface with one FeO6 octahedra, and a faceface with one MnO6 pentagonal pyramid. There are three shorter (2.14 Å) and three longer (2.15 Å) Sn–O bond lengths. In the second Sn4+ site, Sn4+ is bonded to six O2- atoms to form distorted SnO6 octahedra that share corners with six PO4 tetrahedra and a faceface with one MnO6 pentagonal pyramid. There are three shorter (2.11 Å) and three longer (2.13 Å) Sn–O bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one FeO6 octahedra, corners with two SnO6 octahedra, and corners with two MnO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 30–38°. There are a spread of P–O bond distances ranging from 1.51–1.59 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one FeO6 octahedra, corners with two SnO6 octahedra, and corners with two MnO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 38–54°. There are a spread of P–O bond distances ranging from 1.50–1.61 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn+2.33+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Mn+2.33+, one Sn4+, and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Mn+2.33+, one Sn4+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn+2.33+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Fe3+, one Sn4+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Mn+2.33+, one Sn4+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn+2.33+ and one P5+ atom.