Materials Data on ZnSnP2O7 by Materials Project
ZnSnP2O7 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Zn2+ is bonded to four O2- atoms to form distorted ZnO4 tetrahedra that share a cornercorner with one SnO5 square pyramid, corners with four PO4 tetrahedra, and an edgeedge with one ZnO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–2.08 Å. Sn2+ is bonded to five O2- atoms to form distorted SnO5 square pyramids that share a cornercorner with one ZnO4 tetrahedra, corners with five PO4 tetrahedra, and an edgeedge with one SnO5 square pyramid. There are a spread of Sn–O bond distances ranging from 2.25–2.73 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 three equivalent SnO5 square pyramids, a cornercorner with one PO4 tetrahedra, and corners with two equivalent ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.51–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent SnO5 square pyramids, a cornercorner with one PO4 tetrahedra, and corners with two equivalent ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sn2+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Zn2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Zn2+, one Sn2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Zn2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Sn2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Sn2+ and one P5+ atom.