DOI: 10.17188/1302822
title: Materials Data on MnCu3(PO4)4 by Materials Project

description: MnCu3(PO4)4 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. Mn7+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.90–2.25 Å. There are three inequivalent Cu+1.67+ sites. In the first Cu+1.67+ site, Cu+1.67+ is bonded to six O2- atoms to form distorted CuO6 pentagonal pyramids that share corners with four equivalent CuO6 pentagonal pyramids, corners with four PO4 tetrahedra, and an edgeedge with one PO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.87–2.31 Å. In the second Cu+1.67+ site, Cu+1.67+ is bonded in a 4-coordinate geometry to six O2- atoms. There are a spread of Cu–O bond distances ranging from 1.86–2.51 Å. In the third Cu+1.67+ site, Cu+1.67+ is bonded to six O2- atoms to form distorted CuO6 pentagonal pyramids that share corners with four equivalent CuO6 pentagonal pyramids, corners with four PO4 tetrahedra, and an edgeedge with one PO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.88–2.32 Å. There are four 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 MnO6 octahedra, corners with three CuO6 pentagonal pyramids, and an edgeedge with one CuO6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one MnO6 octahedra, a cornercorner with one CuO6 pentagonal pyramid, and an edgeedge with one MnO6 octahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three CuO6 pentagonal pyramids and an edgeedge with one CuO6 pentagonal pyramid. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent MnO6 octahedra and a cornercorner with one CuO6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 52°. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mn7+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Cu+1.67+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Mn7+, one Cu+1.67+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Cu+1.67+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mn7+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Mn7+, one Cu+1.67+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu+1.67+ and one P5+ atom.