Materials Data on ZrP2H4O9 by Materials Project
Zr(HPO4)2H2O crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Zr4+ is bonded to seven O2- atoms to form distorted ZrO7 pentagonal bipyramids that share corners with three equivalent PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.10–2.35 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 ZrO7 pentagonal bipyramids. There are a spread of P–O bond distances ranging from 1.52–1.62 Å. In the second P5+ site, P5+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of P–O bond distances ranging from 1.54–1.85 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted bent 150 degrees geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.52 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.03 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.65 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.63 Å) H–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to one Zr4+ and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one P5+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted linear geometry to one Zr4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Zr4+, one H1+, and one O2- atom. The O–O bond length is 1.49 Å. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Zr4+, one P5+, one H1+, and one O2- atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom.