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Title: Materials Data on Na2Ca4ZrNbSi4(O8F)2 by Materials Project

Abstract

Na2Ca4ZrNbSi4(O8F)2 is Esseneite-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 8-coordinate geometry to six O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.33–3.00 Å. There are one shorter (2.23 Å) and one longer (2.45 Å) Na–F bond lengths. In the second Na1+ site, Na1+ is bonded in a 8-coordinate geometry to six O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.94 Å. There are one shorter (2.33 Å) and one longer (2.62 Å) Na–F bond lengths. There are four inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to seven O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.29–2.87 Å. The Ca–F bond length is 2.28 Å. In the second Ca2+ site, Ca2+ is bonded to five O2- and one F1- atom to form distorted CaO5F octahedra that share corners with five SiO4 tetrahedra, an edgeedge with one NbO5F octahedra, and edges with two equivalent CaO6 octahedra. There are a spreadmore » of Ca–O bond distances ranging from 2.31–2.65 Å. The Ca–F bond length is 2.30 Å. In the third Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share a cornercorner with one NbO5F octahedra, corners with five SiO4 tetrahedra, an edgeedge with one NbO5F octahedra, and edges with two equivalent CaO5F octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Ca–O bond distances ranging from 2.32–2.54 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to six O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.33–2.76 Å. The Ca–F bond length is 2.29 Å. Zr3+ is bonded to six O2- atoms to form ZrO6 octahedra that share a cornercorner with one NbO5F octahedra and corners with five SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Zr–O bond distances ranging from 2.03–2.25 Å. Nb5+ is bonded to five O2- and one F1- atom to form NbO5F octahedra that share a cornercorner with one CaO6 octahedra, a cornercorner with one ZrO6 octahedra, corners with three SiO4 tetrahedra, and edges with two CaO5F octahedra. The corner-sharing octahedra tilt angles range from 47–52°. There are a spread of Nb–O bond distances ranging from 1.86–2.27 Å. The Nb–F bond length is 2.18 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, corners with two CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 38–58°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, corners with two equivalent NbO5F octahedra, corners with three CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–71°. All Si–O bond lengths are 1.64 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two CaO5F octahedra, corners with two equivalent ZrO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–62°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, a cornercorner with one NbO5F octahedra, corners with three CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–65°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Ca2+, one Zr3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ca2+, one Nb5+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+, one Ca2+, and two Si4+ atoms. In the fifth O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted ONaCa2Si trigonal pyramids that share corners with two equivalent FNa2Ca2 tetrahedra and an edgeedge with one ONaCa2Nb tetrahedra. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, two Ca2+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+, one Ca2+, one Zr3+, and one Nb5+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Zr3+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted ONaCa2Si tetrahedra that share a cornercorner with one ONaCa2Nb tetrahedra and corners with two equivalent FNa2Ca2 tetrahedra. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+, one Ca2+, and two Si4+ atoms. In the thirteenth O2- site, O2- is bonded to one Na1+, two Ca2+, and one Nb5+ atom to form distorted ONaCa2Nb tetrahedra that share a cornercorner with one ONaCa2Si tetrahedra, corners with two equivalent FNa2Ca2 tetrahedra, and an edgeedge with one ONaCa2Si trigonal pyramid. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Nb5+, and one Si4+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Ca2+, one Nb5+, and one Si4+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to two Na1+ and two Ca2+ atoms to form FNa2Ca2 tetrahedra that share corners with four ONaCa2Si tetrahedra and corners with two equivalent ONaCa2Si trigonal pyramids. In the second F1- site, F1- is bonded in a 4-coordinate geometry to two Na1+, one Ca2+, and one Nb5+ atom.« less

Authors:
Publication Date:
Other Number(s):
mp-1210786
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; Na2Ca4ZrNbSi4(O8F)2; Ca-F-Na-Nb-O-Si-Zr
OSTI Identifier:
1745805
DOI:
https://doi.org/10.17188/1745805

Citation Formats

The Materials Project. Materials Data on Na2Ca4ZrNbSi4(O8F)2 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1745805.
The Materials Project. Materials Data on Na2Ca4ZrNbSi4(O8F)2 by Materials Project. United States. doi:https://doi.org/10.17188/1745805
The Materials Project. 2020. "Materials Data on Na2Ca4ZrNbSi4(O8F)2 by Materials Project". United States. doi:https://doi.org/10.17188/1745805. https://www.osti.gov/servlets/purl/1745805. Pub date:Wed Apr 29 00:00:00 EDT 2020
@article{osti_1745805,
title = {Materials Data on Na2Ca4ZrNbSi4(O8F)2 by Materials Project},
author = {The Materials Project},
abstractNote = {Na2Ca4ZrNbSi4(O8F)2 is Esseneite-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 8-coordinate geometry to six O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.33–3.00 Å. There are one shorter (2.23 Å) and one longer (2.45 Å) Na–F bond lengths. In the second Na1+ site, Na1+ is bonded in a 8-coordinate geometry to six O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.94 Å. There are one shorter (2.33 Å) and one longer (2.62 Å) Na–F bond lengths. There are four inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to seven O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.29–2.87 Å. The Ca–F bond length is 2.28 Å. In the second Ca2+ site, Ca2+ is bonded to five O2- and one F1- atom to form distorted CaO5F octahedra that share corners with five SiO4 tetrahedra, an edgeedge with one NbO5F octahedra, and edges with two equivalent CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.31–2.65 Å. The Ca–F bond length is 2.30 Å. In the third Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share a cornercorner with one NbO5F octahedra, corners with five SiO4 tetrahedra, an edgeedge with one NbO5F octahedra, and edges with two equivalent CaO5F octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Ca–O bond distances ranging from 2.32–2.54 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to six O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.33–2.76 Å. The Ca–F bond length is 2.29 Å. Zr3+ is bonded to six O2- atoms to form ZrO6 octahedra that share a cornercorner with one NbO5F octahedra and corners with five SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Zr–O bond distances ranging from 2.03–2.25 Å. Nb5+ is bonded to five O2- and one F1- atom to form NbO5F octahedra that share a cornercorner with one CaO6 octahedra, a cornercorner with one ZrO6 octahedra, corners with three SiO4 tetrahedra, and edges with two CaO5F octahedra. The corner-sharing octahedra tilt angles range from 47–52°. There are a spread of Nb–O bond distances ranging from 1.86–2.27 Å. The Nb–F bond length is 2.18 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, corners with two CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 38–58°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, corners with two equivalent NbO5F octahedra, corners with three CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–71°. All Si–O bond lengths are 1.64 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two CaO5F octahedra, corners with two equivalent ZrO6 octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–62°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, a cornercorner with one NbO5F octahedra, corners with three CaO5F octahedra, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–65°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two Ca2+, one Zr3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ca2+, one Nb5+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+, one Ca2+, and two Si4+ atoms. In the fifth O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted ONaCa2Si trigonal pyramids that share corners with two equivalent FNa2Ca2 tetrahedra and an edgeedge with one ONaCa2Nb tetrahedra. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, two Ca2+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+, one Ca2+, one Zr3+, and one Nb5+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Zr3+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded to one Na1+, two Ca2+, and one Si4+ atom to form distorted ONaCa2Si tetrahedra that share a cornercorner with one ONaCa2Nb tetrahedra and corners with two equivalent FNa2Ca2 tetrahedra. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+, one Ca2+, and two Si4+ atoms. In the thirteenth O2- site, O2- is bonded to one Na1+, two Ca2+, and one Nb5+ atom to form distorted ONaCa2Nb tetrahedra that share a cornercorner with one ONaCa2Si tetrahedra, corners with two equivalent FNa2Ca2 tetrahedra, and an edgeedge with one ONaCa2Si trigonal pyramid. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Zr3+, and one Si4+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Ca2+, one Nb5+, and one Si4+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Ca2+, one Nb5+, and one Si4+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to two Na1+ and two Ca2+ atoms to form FNa2Ca2 tetrahedra that share corners with four ONaCa2Si tetrahedra and corners with two equivalent ONaCa2Si trigonal pyramids. In the second F1- site, F1- is bonded in a 4-coordinate geometry to two Na1+, one Ca2+, and one Nb5+ atom.},
doi = {10.17188/1745805},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}