Materials Data on MgAl2(PO5)2 by Materials Project

Dataset · Tue May 05 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1691141· OSTI ID:1691141

MgAl2(PO5)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Mg is bonded to six O atoms to form distorted MgO6 octahedra that share corners with two equivalent AlO6 octahedra, corners with four equivalent PO4 tetrahedra, and faces with two equivalent AlO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Mg–O bond distances ranging from 2.03–2.09 Å. Al is bonded to six O atoms to form AlO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with two equivalent AlO6 octahedra, corners with four equivalent PO4 tetrahedra, and a faceface with one MgO6 octahedra. The corner-sharing octahedra tilt angles range from 39–54°. There are a spread of Al–O bond distances ranging from 1.82–2.04 Å. P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent MgO6 octahedra and corners with four equivalent AlO6 octahedra. The corner-sharing octahedra tilt angles range from 30–49°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. There are five inequivalent O sites. In the first O site, O is bonded in a distorted T-shaped geometry to one Mg, one Al, and one P atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the third O site, O is bonded in a 3-coordinate geometry to one Mg, one Al, and one P atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the fifth O site, O is bonded in a distorted T-shaped geometry to one Mg and two equivalent Al atoms.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1691141
• Report Number(s): mp-1194286
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Al-Mg-O-P
MgAl2(PO5)2
crystal structure