Materials Data on K3NaP2H8O11 by Materials Project

K3NaP2H8O11 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The K–H bond length is 2.84 Å. There are a spread of K–O bond distances ranging from 2.76–3.12 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to one H1+ and seven O2- atoms. The K–H bond length is 2.83 Å. There are a spread of K–O bond distances ranging from 2.64–3.03 Å. In the third K1+ site, K1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of K–O bond distances ranging from 2.71–2.89 Å. Na1+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.34–2.94 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.66 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There is three shorter (1.54 Å) and one longer (1.64 Å) P–O bond length. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the seventh H1+ site, H1+ is bonded in a distorted single-bond geometry to one K1+ and one O2- atom. The H–O bond length is 1.00 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Na1+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one P5+ atom. In the third O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one K1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to one K1+, one Na1+, and two H1+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two K1+, one Na1+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Na1+, and two P5+ atoms. In the ninth O2- site, O2- is bonded in a water-like geometry to two K1+ and two H1+ atoms. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to three K1+, one Na1+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three K1+, one Na1+, and one P5+ atom.