Materials Data on NaYbP2O7 by Materials Project
NaYbP2O7 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.48–2.75 Å. Yb3+ is bonded to six O2- atoms to form YbO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Yb–O bond distances ranging from 2.25–2.36 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 YbO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 15–52°. There are a spread of P–O bond distances ranging from 1.51–1.63 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent YbO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–50°. 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 1-coordinate geometry to two equivalent Na1+, one Yb3+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Yb3+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Yb3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to one Yb3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Yb3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+, one Yb3+, and one P5+ atom.