Materials Data on Mn2Al3Si3O14 by Materials Project
Mn2Al3Si3O14 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Mn+3.50+ sites. In the first Mn+3.50+ site, Mn+3.50+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Mn–O bond distances ranging from 1.92–2.63 Å. In the second Mn+3.50+ site, Mn+3.50+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Mn–O bond distances ranging from 2.01–2.32 Å. There are three inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.84–2.01 Å. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.85–2.00 Å. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.86–1.94 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 48–60°. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Si–O bond distances ranging from 1.59–1.69 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–63°. There is two shorter (1.64 Å) and two longer (1.65 Å) Si–O bond length. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal non-coplanar geometry to one Mn+3.50+ and two equivalent Al3+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Mn+3.50+, one Al3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a water-like geometry to two equivalent Al3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Mn+3.50+ and two Si4+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Al3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to one Mn+3.50+, one Al3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Al3+ and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to one Mn+3.50+, two equivalent Al3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a water-like geometry to two equivalent Al3+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mn+3.50+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a trigonal planar geometry to one Mn+3.50+, one Al3+, and one Si4+ atom.