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Title: Materials Data on CaAl2(Si2O7)2 by Materials Project

Abstract

CaAl2(Si2O7)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ca is bonded to six O atoms to form CaO6 octahedra that share corners with four SiO4 tetrahedra and edges with two AlO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.38–2.52 Å. There are two 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 and an edgeedge with one CaO6 octahedra. There are a spread of Al–O bond distances ranging from 1.72–1.79 Å. In the second Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Al–O bond distances ranging from 1.73–1.80 Å. There are four 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 CaO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In themore » second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two equivalent AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 67°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two equivalent AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are a spread of Si–O bond distances ranging from 1.59–1.65 Å. There are fourteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the second O site, O is bonded in a single-bond geometry to one Ca atom. In the third O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom. 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 single-bond geometry to one Ca atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the ninth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eleventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twelfth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the thirteenth O site, O is bonded in a distorted bent 120 degrees geometry to two Si atoms. In the fourteenth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom.« less

Publication Date:
Other Number(s):
mp-1227927
DOE Contract Number:  
AC02-05CH11231; EDCBEE
Product Type:
Dataset
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; CaAl2(Si2O7)2; Al-Ca-O-Si
OSTI Identifier:
1676675
DOI:
https://doi.org/10.17188/1676675

Citation Formats

The Materials Project. Materials Data on CaAl2(Si2O7)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1676675.
The Materials Project. Materials Data on CaAl2(Si2O7)2 by Materials Project. United States. doi:https://doi.org/10.17188/1676675
The Materials Project. 2020. "Materials Data on CaAl2(Si2O7)2 by Materials Project". United States. doi:https://doi.org/10.17188/1676675. https://www.osti.gov/servlets/purl/1676675. Pub date:Sat May 02 00:00:00 EDT 2020
@article{osti_1676675,
title = {Materials Data on CaAl2(Si2O7)2 by Materials Project},
author = {The Materials Project},
abstractNote = {CaAl2(Si2O7)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ca is bonded to six O atoms to form CaO6 octahedra that share corners with four SiO4 tetrahedra and edges with two AlO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.38–2.52 Å. There are two 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 and an edgeedge with one CaO6 octahedra. There are a spread of Al–O bond distances ranging from 1.72–1.79 Å. In the second Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Al–O bond distances ranging from 1.73–1.80 Å. There are four 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 CaO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two equivalent AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 67°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two equivalent AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are a spread of Si–O bond distances ranging from 1.59–1.65 Å. There are fourteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the second O site, O is bonded in a single-bond geometry to one Ca atom. In the third O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom. 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 single-bond geometry to one Ca atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the ninth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eleventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the twelfth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the thirteenth O site, O is bonded in a distorted bent 120 degrees geometry to two Si atoms. In the fourteenth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom.},
doi = {10.17188/1676675},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}