Materials Data on Mg2Be3P3H13O19 by Materials Project
Mg2Be3P3H13O19 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with three equivalent PO4 tetrahedra and a faceface with one MgO6 octahedra. There are three shorter (2.09 Å) and three longer (2.12 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three equivalent PO4 tetrahedra and a faceface with one MgO6 octahedra. All Mg–O bond lengths are 2.11 Å. Be2+ is bonded to four O2- atoms to form BeO4 tetrahedra that share corners with two equivalent BeO4 tetrahedra and corners with three equivalent PO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.60–1.77 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two MgO6 octahedra and corners with three equivalent BeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 37–51°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. There are five 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 0.99 Å. In the second 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 third 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 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 1.00 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Be2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted tetrahedral geometry to three equivalent Be2+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Be2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Be2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two Mg2+ and one P5+ atom.