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Title: Materials Data on KNbPO5 by Materials Project

Abstract

KNbPO5 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.39 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.26 Å. There are two inequivalent Nb4+ sites. In the first Nb4+ site, Nb4+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–O bond distances ranging from 1.99–2.16 Å. In the second Nb4+ site, Nb4+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–O bond distances ranging from 1.92–2.21 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedramore » that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 46–48°. There is three shorter (1.55 Å) and one longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 45–48°. All P–O bond lengths are 1.56 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two Nb4+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two Nb4+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Nb4+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nb4+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom.« less

Publication Date:
Other Number(s):
mp-1211814
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; KNbPO5; K-Nb-O-P
OSTI Identifier:
1751421
DOI:
https://doi.org/10.17188/1751421

Citation Formats

The Materials Project. Materials Data on KNbPO5 by Materials Project. United States: N. p., 2020. Web. doi:10.17188/1751421.
The Materials Project. Materials Data on KNbPO5 by Materials Project. United States. doi:https://doi.org/10.17188/1751421
The Materials Project. 2020. "Materials Data on KNbPO5 by Materials Project". United States. doi:https://doi.org/10.17188/1751421. https://www.osti.gov/servlets/purl/1751421. Pub date:Thu Apr 30 00:00:00 EDT 2020
@article{osti_1751421,
title = {Materials Data on KNbPO5 by Materials Project},
author = {The Materials Project},
abstractNote = {KNbPO5 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.39 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.81–3.26 Å. There are two inequivalent Nb4+ sites. In the first Nb4+ site, Nb4+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–O bond distances ranging from 1.99–2.16 Å. In the second Nb4+ site, Nb4+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–O bond distances ranging from 1.92–2.21 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 46–48°. There is three shorter (1.55 Å) and one longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 45–48°. All P–O bond lengths are 1.56 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two Nb4+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+ and two Nb4+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Nb4+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nb4+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two K1+, one Nb4+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Nb4+, and one P5+ atom.},
doi = {10.17188/1751421},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}