Materials Data on Cu3P4Pb3O16 by Materials Project
Pb3Cu3(PO4)4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.95 Å) and two longer (1.99 Å) Cu–O bond length. In the second Cu2+ site, Cu2+ is bonded to five O2- atoms to form CuO5 trigonal bipyramids that share corners with five PO4 tetrahedra and an edgeedge with one PbO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.96–2.16 Å. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded to six O2- atoms to form distorted PbO6 octahedra that share corners with six PO4 tetrahedra and edges with two equivalent CuO5 trigonal bipyramids. There are a spread of Pb–O bond distances ranging from 2.38–2.78 Å. In the second Pb2+ site, Pb2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pb–O bond distances ranging from 2.45–3.25 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 a cornercorner with one PbO6 octahedra and corners with two equivalent CuO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 57°. There are a spread of P–O bond distances ranging from 1.53–1.60 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent PbO6 octahedra and corners with three equivalent CuO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 40–60°. There is three shorter (1.55 Å) and one longer (1.59 Å) P–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+, one Pb2+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Pb2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Cu2+, one Pb2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+, one Pb2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Cu2+, two equivalent Pb2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+, one Pb2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Pb2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Cu2+, two Pb2+, and one P5+ atom.