Materials Data on K2Na3P3O10 by Materials Project
K2Na3P3O10 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.21 Å. There are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.45–2.89 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.39–2.42 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 NaO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 16–41°. There is three shorter (1.53 Å) and one longer (1.67 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There is two shorter (1.52 Å) and two longer (1.62 Å) P–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent K1+, two Na1+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent K1+, two Na1+, and one P5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+, two Na1+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+ and two P5+ atoms. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two equivalent Na1+, and one P5+ atom.