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Title: Materials Data on Ca8Al11Fe(Si3O13)4 by Materials Project

Abstract

Ca8FeAl11(Si3O13)4 is Esseneite-derived structured and crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are eight inequivalent Ca sites. In the first Ca site, Ca is bonded in a 1-coordinate geometry to ten O atoms. There are a spread of Ca–O bond distances ranging from 2.28–3.02 Å. In the second Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.26–2.72 Å. In the third Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.28–2.72 Å. In the fourth Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.28–2.73 Å. In the fifth Ca site, Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.53 Å. In the sixth Ca site, Ca is bonded in a 9-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.53 Å. In the seventh Ca site, Ca is bonded in amore » 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.53 Å. In the eighth Ca site, Ca is bonded in a 9-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.31–2.52 Å. Fe is bonded to six O atoms to form distorted FeO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.92–2.30 Å. There are seven inequivalent Al sites. In the first Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra and edges with four AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.85–1.97 Å. In the second Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra, an edgeedge with one FeO6 octahedra, and edges with three AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.84–1.99 Å. In the third Al site, Al is bonded to six O 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 1.85–1.98 Å. In the fourth Al site, Al is bonded to six O 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 1.85–1.98 Å. In the fifth Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.81–2.32 Å. In the sixth Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.80–2.33 Å. In the seventh Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.81–2.32 Å. There are twelve inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent FeO6 octahedra, corners with two equivalent AlO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the second Si site, Si is bonded to four O 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 54–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the third Si site, Si is bonded to four O 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 54–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the fourth Si site, Si is bonded to four O 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 53–57°. There is one shorter (1.60 Å) and three longer (1.66 Å) Si–O bond length. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with four AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–55°. There are a spread of Si–O bond distances ranging from 1.64–1.68 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.67 Å. In the seventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.68 Å. In the eighth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.67 Å. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one FeO6 octahedra, corners with two equivalent AlO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–53°. There is one shorter (1.60 Å) and three 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 three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–52°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the eleventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 26–52°. There is one shorter (1.60 Å) and three longer (1.64 Å) Si–O bond length. In the twelfth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–52°. There is one shorter (1.60 Å) and three longer (1.65 Å) Si–O bond length. There are forty inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to two equivalent Ca, one Fe, and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the third O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fifth O site, O is bonded in a trigonal non-coplanar geometry to one Fe and two equivalent Al atoms. In the sixth O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the seventh O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the eighth O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the ninth O site, O is bonded to one Ca, one Fe, one Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAlFeSi tetrahedra. In the tenth O site, O is bonded to one Ca, two Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAl2Si tetrahedra. In the eleventh O site, O is bonded to one Ca, two Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAl2Si tetrahedra. In the twelfth O site, O is bonded to one Ca, two Al, and one Si atom to form distorted OCaAl2Si tetrahedra that share corners with two OCaAlFeSi tetrahedra and an edgeedge with one OCaAl2Si tetrahedra. In the thirteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fourteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fifteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the sixteenth O site, O is bonded in a 4-coordinate geometry to two Ca, one Al, and one Si atom. In the seventeenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the eighteenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the nineteenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the twentieth O site, O is bonded in a 4-coordinate geometry to two equivalent Al and one Si atom. In the twenty-first O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-second O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-third O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-fourth O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-fifth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-sixth O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-seventh O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-eighth O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-ninth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirtieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-third O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-fifth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-sixth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-seventh O site, O is bonded in a 4-coordinate geometry to two Ca, one Fe, and one Si atom. In the thirty-eighth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the thirty-ninth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fortieth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom.« less

Authors:
Publication Date:
Other Number(s):
mp-1227897
DOE Contract Number:  
AC02-05CH11231; EDCBEE
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)
Collaborations:
MIT; UC Berkeley; Duke; U Louvain
Subject:
36 MATERIALS SCIENCE
Keywords:
crystal structure; Ca8Al11Fe(Si3O13)4; Al-Ca-Fe-O-Si
OSTI Identifier:
1694819
DOI:
https://doi.org/10.17188/1694819

Citation Formats

The Materials Project. Materials Data on Ca8Al11Fe(Si3O13)4 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1694819.
The Materials Project. Materials Data on Ca8Al11Fe(Si3O13)4 by Materials Project. United States. doi:https://doi.org/10.17188/1694819
The Materials Project. 2020. "Materials Data on Ca8Al11Fe(Si3O13)4 by Materials Project". United States. doi:https://doi.org/10.17188/1694819. https://www.osti.gov/servlets/purl/1694819. Pub date:Fri Jun 05 00:00:00 EDT 2020
@article{osti_1694819,
title = {Materials Data on Ca8Al11Fe(Si3O13)4 by Materials Project},
author = {The Materials Project},
abstractNote = {Ca8FeAl11(Si3O13)4 is Esseneite-derived structured and crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are eight inequivalent Ca sites. In the first Ca site, Ca is bonded in a 1-coordinate geometry to ten O atoms. There are a spread of Ca–O bond distances ranging from 2.28–3.02 Å. In the second Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.26–2.72 Å. In the third Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.28–2.72 Å. In the fourth Ca site, Ca is bonded in a 1-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.28–2.73 Å. In the fifth Ca site, Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.53 Å. In the sixth Ca site, Ca is bonded in a 9-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.53 Å. In the seventh Ca site, Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.53 Å. In the eighth Ca site, Ca is bonded in a 9-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.31–2.52 Å. Fe is bonded to six O atoms to form distorted FeO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.92–2.30 Å. There are seven inequivalent Al sites. In the first Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra and edges with four AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.85–1.97 Å. In the second Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with four SiO4 tetrahedra, an edgeedge with one FeO6 octahedra, and edges with three AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.84–1.99 Å. In the third Al site, Al is bonded to six O 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 1.85–1.98 Å. In the fourth Al site, Al is bonded to six O 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 1.85–1.98 Å. In the fifth Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.81–2.32 Å. In the sixth Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.80–2.33 Å. In the seventh Al site, Al is bonded to six O atoms to form distorted AlO6 octahedra that share corners with five SiO4 tetrahedra and edges with two equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.81–2.32 Å. There are twelve inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent FeO6 octahedra, corners with two equivalent AlO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the second Si site, Si is bonded to four O 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 54–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the third Si site, Si is bonded to four O 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 54–56°. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the fourth Si site, Si is bonded to four O 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 53–57°. There is one shorter (1.60 Å) and three longer (1.66 Å) Si–O bond length. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with four AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–55°. There are a spread of Si–O bond distances ranging from 1.64–1.68 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.67 Å. In the seventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.68 Å. In the eighth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with six AlO6 octahedra. The corner-sharing octahedra tilt angles range from 47–53°. There are a spread of Si–O bond distances ranging from 1.65–1.67 Å. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one FeO6 octahedra, corners with two equivalent AlO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–53°. There is one shorter (1.60 Å) and three 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 three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–52°. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the eleventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 26–52°. There is one shorter (1.60 Å) and three longer (1.64 Å) Si–O bond length. In the twelfth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three AlO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–52°. There is one shorter (1.60 Å) and three longer (1.65 Å) Si–O bond length. There are forty inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to two equivalent Ca, one Fe, and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the third O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fifth O site, O is bonded in a trigonal non-coplanar geometry to one Fe and two equivalent Al atoms. In the sixth O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the seventh O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the eighth O site, O is bonded in a trigonal non-coplanar geometry to three Al atoms. In the ninth O site, O is bonded to one Ca, one Fe, one Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAlFeSi tetrahedra. In the tenth O site, O is bonded to one Ca, two Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAl2Si tetrahedra. In the eleventh O site, O is bonded to one Ca, two Al, and one Si atom to form a mixture of distorted corner and edge-sharing OCaAl2Si tetrahedra. In the twelfth O site, O is bonded to one Ca, two Al, and one Si atom to form distorted OCaAl2Si tetrahedra that share corners with two OCaAlFeSi tetrahedra and an edgeedge with one OCaAl2Si tetrahedra. In the thirteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fourteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fifteenth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the sixteenth O site, O is bonded in a 4-coordinate geometry to two Ca, one Al, and one Si atom. In the seventeenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the eighteenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the nineteenth O site, O is bonded in a 3-coordinate geometry to two equivalent Al and one Si atom. In the twentieth O site, O is bonded in a 4-coordinate geometry to two equivalent Al and one Si atom. In the twenty-first O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-second O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-third O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-fourth O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the twenty-fifth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-sixth O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-seventh O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-eighth O site, O is bonded in a 4-coordinate geometry to one Ca, two equivalent Al, and one Si atom. In the twenty-ninth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirtieth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-second O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the thirty-third O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-fifth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-sixth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Ca and two equivalent Al atoms. In the thirty-seventh O site, O is bonded in a 4-coordinate geometry to two Ca, one Fe, and one Si atom. In the thirty-eighth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the thirty-ninth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom. In the fortieth O site, O is bonded in a 2-coordinate geometry to two Ca, one Al, and one Si atom.},
doi = {10.17188/1694819},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {6}
}