DOE Data Explorer title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Materials Data on K2SmNb5O15 by Materials Project

Abstract

K2SmNb5O15 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.22 Å. Sm3+ is bonded to twelve O2- atoms to form SmO12 cuboctahedra that share faces with two equivalent SmO12 cuboctahedra and faces with eight equivalent NbO6 octahedra. There are four shorter (2.61 Å) and eight longer (2.70 Å) Sm–O bond lengths. There are two inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 0–31°. There are two shorter (1.98 Å) and four longer (2.02 Å) Nb–O bond lengths. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SmO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 12–38°. There are a spread of Nb–O bond distances ranging from 1.92–2.10 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent K1+ and two Nb5+ atoms. Inmore » the second O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sm3+, and two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent K1+ and two equivalent Nb5+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two equivalent K1+ and two equivalent Nb5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sm3+ and two equivalent Nb5+ atoms.« less

Publication Date:
Other Number(s):
mp-1211765
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; K2SmNb5O15; K-Nb-O-Sm
OSTI Identifier:
1680695
DOI:
https://doi.org/10.17188/1680695

Citation Formats

The Materials Project. Materials Data on K2SmNb5O15 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1680695.
The Materials Project. Materials Data on K2SmNb5O15 by Materials Project. United States. doi:https://doi.org/10.17188/1680695
The Materials Project. 2020. "Materials Data on K2SmNb5O15 by Materials Project". United States. doi:https://doi.org/10.17188/1680695. https://www.osti.gov/servlets/purl/1680695. Pub date:Wed Apr 29 00:00:00 EDT 2020
@article{osti_1680695,
title = {Materials Data on K2SmNb5O15 by Materials Project},
author = {The Materials Project},
abstractNote = {K2SmNb5O15 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.22 Å. Sm3+ is bonded to twelve O2- atoms to form SmO12 cuboctahedra that share faces with two equivalent SmO12 cuboctahedra and faces with eight equivalent NbO6 octahedra. There are four shorter (2.61 Å) and eight longer (2.70 Å) Sm–O bond lengths. There are two inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 0–31°. There are two shorter (1.98 Å) and four longer (2.02 Å) Nb–O bond lengths. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and faces with two equivalent SmO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 12–38°. There are a spread of Nb–O bond distances ranging from 1.92–2.10 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent K1+ and two Nb5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Sm3+, and two equivalent Nb5+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent K1+ and two equivalent Nb5+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two equivalent K1+ and two equivalent Nb5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sm3+ and two equivalent Nb5+ atoms.},
doi = {10.17188/1680695},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}