Materials Data on Ag2P2H2O7 by Materials Project
Ag2P2H2O7 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. Ag1+ is bonded to six O2- atoms to form distorted AgO6 octahedra that share corners with six equivalent PO4 tetrahedra and edges with four equivalent AgO6 octahedra. There are a spread of Ag–O bond distances ranging from 2.49–2.82 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six equivalent AgO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 52–61°. There are a spread of P–O bond distances ranging from 1.52–1.62 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two equivalent O2- atoms. Both H–O bond lengths are 1.21 Å. In the second H1+ site, H1+ is bonded in a linear geometry to two equivalent O2- atoms. Both H–O bond lengths are 1.21 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent P5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ag1+, one P5+, and one H1+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Ag1+, one P5+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Ag1+ and one P5+ atom.