Materials Data on Zn3CuP2O9 by Materials Project
CuZn3P2O9 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Cu2+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with six PO4 tetrahedra, an edgeedge with one CuO6 octahedra, and edges with two equivalent ZnO5 trigonal bipyramids. There are a spread of Cu–O bond distances ranging from 2.03–2.50 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to five O2- atoms to form distorted ZnO5 trigonal bipyramids that share corners with three equivalent ZnO4 tetrahedra, corners with four PO4 tetrahedra, a cornercorner with one ZnO5 trigonal bipyramid, an edgeedge with one CuO6 octahedra, and an edgeedge with one ZnO5 trigonal bipyramid. There are a spread of Zn–O bond distances ranging from 1.99–2.24 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with two PO4 tetrahedra, corners with six equivalent ZnO5 trigonal bipyramids, and an edgeedge with one ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.89–2.00 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent CuO6 octahedra, a cornercorner with one ZnO4 tetrahedra, and corners with two equivalent ZnO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 49–54°. There is one shorter (1.52 Å) and three longer (1.57 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CuO6 octahedra, a cornercorner with one ZnO4 tetrahedra, and corners with six equivalent ZnO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 62°. There are a spread of P–O bond distances ranging from 1.53–1.60 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Cu2+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Zn2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+, one Zn2+, and one P5+ atom. In the fourth O2- site, O2- is bonded to three Zn2+ and one P5+ atom to form distorted corner-sharing OZn3P tetrahedra. In the fifth O2- site, O2- is bonded to four Zn2+ atoms to form OZn4 tetrahedra that share corners with four equivalent OZn3P tetrahedra and an edgeedge with one OZn4 tetrahedra. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zn2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cu2+, one Zn2+, and one P5+ atom.