DOI: 10.17188/1752613
title: Materials Data on Ca8Be5Al3(Si9O28)2 by Materials Project

description: Ca8Be5Al3(Si9O28)2 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are four inequivalent Ca sites. In the first Ca site, Ca is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.66 Å. In the second Ca site, Ca is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.70 Å. In the third Ca site, Ca is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.71 Å. In the fourth Ca site, Ca is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.70 Å. There are three inequivalent Be sites. In the first Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with four SiO4 tetrahedra. There is two shorter (1.62 Å) and two longer (1.67 Å) Be–O bond length. In the second Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with three SiO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.62–1.70 Å. In the third Be site, Be is bonded to four O atoms to form BeO4 tetrahedra that share corners with three SiO4 tetrahedra. There are a spread of Be–O bond distances ranging from 1.62–1.72 Å. There are three inequivalent Al sites. In the first Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra. There is two shorter (1.75 Å) and two longer (1.76 Å) Al–O bond length. In the second Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra. There is two shorter (1.75 Å) and two longer (1.76 Å) Al–O bond length. In the third Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra. There is two shorter (1.75 Å) and two longer (1.76 Å) Al–O bond length. There are eleven inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There is one shorter (1.62 Å) and three longer (1.64 Å) Si–O bond length. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra and corners with three SiO4 tetrahedra. There is one shorter (1.62 Å) and three longer (1.64 Å) Si–O bond length. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one BeO4 tetrahedra, a cornercorner with one AlO4 tetrahedra, and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.72 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra and corners with two AlO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.71 Å. In the seventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two BeO4 tetrahedra and corners with two SiO4 tetrahedra. There is two shorter (1.64 Å) and two longer (1.67 Å) Si–O bond length. In the eighth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent BeO4 tetrahedra and corners with two equivalent SiO4 tetrahedra. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent AlO4 tetrahedra and corners with two equivalent SiO4 tetrahedra. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the tenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent AlO4 tetrahedra and corners with two equivalent SiO4 tetrahedra. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the eleventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent AlO4 tetrahedra and corners with two equivalent SiO4 tetrahedra. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. There are twenty-eight inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the third O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the fourth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the fifth O site, O is bonded in a distorted bent 120 degrees geometry to two Ca, one Be, and one Si atom. In the sixth O site, O is bonded in a distorted bent 120 degrees geometry to two Ca, one Be, and one Si atom. In the seventh O site, O is bonded in a 3-coordinate geometry to one Ca, one Be, and one Si atom. In the eighth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the ninth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the tenth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the eleventh O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Be, and one Si atom. In the twelfth O site, O is bonded in a 3-coordinate geometry to one Ca, one Be, and one Si atom. In the thirteenth O site, O is bonded in a 3-coordinate geometry to one Ca, one Be, and one Si atom. In the fourteenth O site, O is bonded in a 3-coordinate geometry to one Ca, one Be, and one Si atom. In the fifteenth O site, O is bonded in a distorted bent 120 degrees geometry to two Ca and two Si atoms. In the sixteenth O site, O is bonded in a distorted bent 120 degrees geometry to two Ca and two Si atoms. In the seventeenth O site, O is bonded in a trigonal planar geometry to two Ca and one Si atom. In the eighteenth O site, O is bonded in a trigonal planar geometry to two Ca and one Si atom. In the nineteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twentieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twenty-third O site, O is bonded in a 2-coordinate geometry to one Ca, one Be, and one Si atom. In the twenty-fourth O site, O is bonded in a 2-coordinate geometry to one Ca, one Al, and one Si atom. In the twenty-fifth O site, O is bonded in a 2-coordinate geometry to one Ca, one Al, and one Si atom. In the twenty-sixth O site, O is bonded in a 2-coordinate geometry to one Ca, one Al, and one Si atom. In the twenty-seventh O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Be atom. In the twenty-eighth O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Be atom.