DOI: 10.17188/1740970
title: Materials Data on CaMnAl4SiP3(HO4)5 by Materials Project

description: CaMnAl4SiP3(HO4)5 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ca2+ is bonded in a 6-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.47–2.91 Å. Mn2+ is bonded to seven O2- atoms to form distorted MnO7 pentagonal bipyramids that share corners with four equivalent PO4 tetrahedra, edges with four AlO6 octahedra, and an edgeedge with one PO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 2.12–2.42 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share a cornercorner with one AlO6 octahedra, corners with four PO4 tetrahedra, an edgeedge with one AlO6 octahedra, and an edgeedge with one MnO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 39°. There are a spread of Al–O bond distances ranging from 1.84–2.15 Å. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share a cornercorner with one AlO6 octahedra, corners with two equivalent SiO4 tetrahedra, corners with two equivalent PO4 tetrahedra, an edgeedge with one AlO6 octahedra, and an edgeedge with one MnO7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 39°. There are a spread of Al–O bond distances ranging from 1.85–1.98 Å. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent AlO6 octahedra. The corner-sharing octahedra tilt angles range from 50–59°. There are a spread of Si–O bond distances ranging from 1.64–1.66 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 four equivalent AlO6 octahedra and an edgeedge with one MnO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 47–51°. There are a spread of P–O bond distances ranging from 1.53–1.61 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four AlO6 octahedra and corners with two equivalent MnO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 27–53°. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. There are four 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 0.98 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 distorted linear geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.57 Å) H–O bond length. There are thirteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Mn2+, two equivalent Al3+, and one P5+ atom. In the second O2- site, O2- is bonded in a water-like geometry to one Mn2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Ca2+, one Al3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Mn2+, one Al3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Mn2+, one Al3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ca2+, one Al3+, and one P5+ 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 3-coordinate geometry to one Ca2+, one Al3+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Al3+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Si4+ and two H1+ atoms. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Al3+ and one H1+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to two Al3+ and one H1+ atom. In the thirteenth O2- site, O2- is bonded in a distorted single-bond geometry to one Mn2+, two equivalent Al3+, and one H1+ atom.