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Title: Materials Data on Na3Ca7Ta3Ti7O30 by Materials Project

Abstract

Na3Ca7Ti7Ta3O30 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–2.84 Å. In the second Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.88 Å. In the third Na1+ site, Na1+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–3.00 Å. In the fourth Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.88 Å. In the fifth Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.90 Å. In the sixth Na1+ site, Na1+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.96 Å. There are fourteen inequivalent Ca2+ sites. In the firstmore » Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.75 Å. In the second Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.79 Å. In the third Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.87 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.85 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.74 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.77 Å. In the seventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.38–2.79 Å. In the eighth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.76 Å. In the ninth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.69 Å. In the tenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.39–2.70 Å. In the eleventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.37–2.72 Å. In the twelfth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.38–2.81 Å. In the thirteenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.69 Å. In the fourteenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.70 Å. There are fourteen inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 24–28°. There are a spread of Ti–O bond distances ranging from 1.90–2.07 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–28°. There are a spread of Ti–O bond distances ranging from 1.91–2.07 Å. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 21–30°. There are a spread of Ti–O bond distances ranging from 1.91–2.02 Å. In the fourth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 19–29°. There are a spread of Ti–O bond distances ranging from 1.87–2.12 Å. In the fifth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 20–29°. There are a spread of Ti–O bond distances ranging from 1.92–2.02 Å. In the sixth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–28°. There are a spread of Ti–O bond distances ranging from 1.93–2.05 Å. In the seventh Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Ti–O bond distances ranging from 1.92–2.07 Å. In the eighth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 22–27°. There are a spread of Ti–O bond distances ranging from 1.90–2.09 Å. In the ninth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 25–30°. There are a spread of Ti–O bond distances ranging from 1.93–2.04 Å. In the tenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ti–O bond distances ranging from 1.86–2.15 Å. In the eleventh Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–31°. There are a spread of Ti–O bond distances ranging from 1.89–2.08 Å. In the twelfth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 19–30°. There are a spread of Ti–O bond distances ranging from 1.86–2.10 Å. In the thirteenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ti–O bond distances ranging from 1.90–2.05 Å. In the fourteenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Ti–O bond distances ranging from 1.91–2.04 Å. There are six inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. There are a spread of Ta–O bond distances ranging from 1.93–2.06 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–31°. There are a spread of Ta–O bond distances ranging from 1.97–2.01 Å. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 20–30°. There are a spread of Ta–O bond distances ranging from 1.96–2.03 Å. In the fourth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–30°. There are a spread of Ta–O bond distances ranging from 1.96–2.04 Å. In the fifth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ta–O bond distances ranging from 1.94–2.05 Å. In the sixth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five TiO6 octahedra. The corner-sharing octahedra tilt angles range from 24–30°. There are a spread of Ta–O bond distances ranging from 1.94–2.05 Å. There are sixty inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted tetrahedral geometry to two Ca2+ and two Ti4+ atoms. In the second O2- site, O2- is bonded in a distorted tetrahedral geometry to two Ca2+ and two Ti4+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+ and two Ti4+ atoms. In the fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Ca2+ and two Ti4+ atoms. In the fifth O2- site, O2- is bonded to two Ca2+ and two Ti4+ atoms to form distorted corner-sharing OCa2Ti2 tetrahedra. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the fourteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the seventeenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-first O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-seven« less

Authors:
Contributors:
Researcher:
Publication Date:
Other Number(s):
mp-694044
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; Na3Ca7Ta3Ti7O30; Ca-Na-O-Ta-Ti
OSTI Identifier:
1284668
DOI:
10.17188/1284668

Citation Formats

Persson, Kristin, and Project, Materials. Materials Data on Na3Ca7Ta3Ti7O30 by Materials Project. United States: N. p., 2019. Web. doi:10.17188/1284668.
Persson, Kristin, & Project, Materials. Materials Data on Na3Ca7Ta3Ti7O30 by Materials Project. United States. doi:10.17188/1284668.
Persson, Kristin, and Project, Materials. 2019. "Materials Data on Na3Ca7Ta3Ti7O30 by Materials Project". United States. doi:10.17188/1284668. https://www.osti.gov/servlets/purl/1284668. Pub date:Fri Jan 11 00:00:00 EST 2019
@article{osti_1284668,
title = {Materials Data on Na3Ca7Ta3Ti7O30 by Materials Project},
author = {Persson, Kristin and Project, Materials},
abstractNote = {Na3Ca7Ti7Ta3O30 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–2.84 Å. In the second Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.88 Å. In the third Na1+ site, Na1+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–3.00 Å. In the fourth Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.88 Å. In the fifth Na1+ site, Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.38–2.90 Å. In the sixth Na1+ site, Na1+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.96 Å. There are fourteen inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.75 Å. In the second Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.79 Å. In the third Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.87 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.85 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.74 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.77 Å. In the seventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.38–2.79 Å. In the eighth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.76 Å. In the ninth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.69 Å. In the tenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.39–2.70 Å. In the eleventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.37–2.72 Å. In the twelfth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.38–2.81 Å. In the thirteenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.69 Å. In the fourteenth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.36–2.70 Å. There are fourteen inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 24–28°. There are a spread of Ti–O bond distances ranging from 1.90–2.07 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–28°. There are a spread of Ti–O bond distances ranging from 1.91–2.07 Å. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 21–30°. There are a spread of Ti–O bond distances ranging from 1.91–2.02 Å. In the fourth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 19–29°. There are a spread of Ti–O bond distances ranging from 1.87–2.12 Å. In the fifth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 20–29°. There are a spread of Ti–O bond distances ranging from 1.92–2.02 Å. In the sixth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–28°. There are a spread of Ti–O bond distances ranging from 1.93–2.05 Å. In the seventh Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Ti–O bond distances ranging from 1.92–2.07 Å. In the eighth Ti4+ site, Ti4+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedra tilt angles range from 22–27°. There are a spread of Ti–O bond distances ranging from 1.90–2.09 Å. In the ninth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 25–30°. There are a spread of Ti–O bond distances ranging from 1.93–2.04 Å. In the tenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TiO6 octahedra and corners with four equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ti–O bond distances ranging from 1.86–2.15 Å. In the eleventh Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–31°. There are a spread of Ti–O bond distances ranging from 1.89–2.08 Å. In the twelfth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 19–30°. There are a spread of Ti–O bond distances ranging from 1.86–2.10 Å. In the thirteenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ti–O bond distances ranging from 1.90–2.05 Å. In the fourteenth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Ti–O bond distances ranging from 1.91–2.04 Å. There are six inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. There are a spread of Ta–O bond distances ranging from 1.93–2.06 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–31°. There are a spread of Ta–O bond distances ranging from 1.97–2.01 Å. In the third Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 20–30°. There are a spread of Ta–O bond distances ranging from 1.96–2.03 Å. In the fourth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six TiO6 octahedra. The corner-sharing octahedra tilt angles range from 23–30°. There are a spread of Ta–O bond distances ranging from 1.96–2.04 Å. In the fifth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with two TaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Ta–O bond distances ranging from 1.94–2.05 Å. In the sixth Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five TiO6 octahedra. The corner-sharing octahedra tilt angles range from 24–30°. There are a spread of Ta–O bond distances ranging from 1.94–2.05 Å. There are sixty inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted tetrahedral geometry to two Ca2+ and two Ti4+ atoms. In the second O2- site, O2- is bonded in a distorted tetrahedral geometry to two Ca2+ and two Ti4+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+ and two Ti4+ atoms. In the fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Ca2+ and two Ti4+ atoms. In the fifth O2- site, O2- is bonded to two Ca2+ and two Ti4+ atoms to form distorted corner-sharing OCa2Ti2 tetrahedra. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the fourteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the seventeenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-first O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, and two Ti4+ atoms. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Na1+, two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to two Na1+, one Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+, one Ti4+, and one Ta5+ atom. In the twenty-seven},
doi = {10.17188/1284668},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

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