DOI: 10.17188/1283254
title: Materials Data on Ca11AlSi3ClO18 by Materials Project

description: Ca11AlSi3O18Cl crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are six inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five O2- and one Cl1- atom. There are a spread of Ca–O bond distances ranging from 2.24–2.62 Å. The Ca–Cl bond length is 3.30 Å. In the second Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five O2- and one Cl1- atom. There are a spread of Ca–O bond distances ranging from 2.24–2.62 Å. The Ca–Cl bond length is 3.29 Å. In the third Ca2+ site, Ca2+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.43–2.62 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five O2- and one Cl1- atom. There are a spread of Ca–O bond distances ranging from 2.33–2.58 Å. The Ca–Cl bond length is 3.28 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 5-coordinate geometry to five O2- and one Cl1- atom. There are a spread of Ca–O bond distances ranging from 2.32–2.58 Å. The Ca–Cl bond length is 3.28 Å. In the sixth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with two equivalent CaO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Ca–O bond distances ranging from 2.22–2.41 Å. Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with two equivalent CaO6 octahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Al–O bond distances ranging from 1.77–1.79 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent CaO6 octahedra. The corner-sharing octahedral tilt angles are 42°. All Si–O bond lengths are 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 CaO6 octahedra. The corner-sharing octahedra tilt angles range from 42–43°. There is two shorter (1.65 Å) and two longer (1.66 Å) Si–O bond length. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the second O2- site, O2- is bonded to six Ca2+ atoms to form distorted OCa6 octahedra that share corners with two equivalent OCa6 octahedra and corners with two OCa3Al tetrahedra. The corner-sharing octahedral tilt angles are 1°. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Ca2+ and one Si4+ atom. In the fifth O2- site, O2- is bonded to three Ca2+ and one Al3+ atom to form distorted OCa3Al tetrahedra that share corners with two equivalent OCa6 octahedra and an edgeedge with one OCa3Al tetrahedra. The corner-sharing octahedral tilt angles are 60°. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Ca2+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the eighth O2- site, O2- is bonded to three Ca2+ and one Al3+ atom to form distorted OCa3Al tetrahedra that share corners with two equivalent OCa6 octahedra and an edgeedge with one OCa3Al tetrahedra. The corner-sharing octahedral tilt angles are 62°. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Al3+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. Cl1- is bonded in a body-centered cubic geometry to eight Ca2+ atoms.