Title: Materials Data on K5Na3Nb4(WO6)4 by Materials Project

Abstract

K5Na3Nb4(WO6)4 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are four inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to twelve O2- atoms to form KO12 cuboctahedra that share corners with four equivalent KO12 cuboctahedra, corners with eight equivalent NaO12 cuboctahedra, faces with two equivalent NaO12 cuboctahedra, faces with four equivalent KO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are a spread of K–O bond distances ranging from 2.82–2.87 Å. In the second K1+ site, K1+ is bonded to twelve O2- atoms to form KO12 cuboctahedra that share corners with four equivalent NaO12 cuboctahedra, corners with eight KO12 cuboctahedra, faces with two equivalent NaO12 cuboctahedra, faces with four KO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are a spread of K–O bond distances ranging from 2.83–2.87 Å. In the third K1+ site, K1+ is bonded to twelve O2- atoms to form KO12 cuboctahedra that share corners with four equivalent KO12 cuboctahedra, corners with eight equivalent NaO12 cuboctahedra, faces with six KO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are amore » spread of K–O bond distances ranging from 2.84–2.88 Å. In the fourth K1+ site, K1+ is bonded to twelve O2- atoms to form KO12 cuboctahedra that share corners with four equivalent NaO12 cuboctahedra, corners with eight equivalent KO12 cuboctahedra, faces with two equivalent KO12 cuboctahedra, faces with four equivalent NaO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are a spread of K–O bond distances ranging from 2.83–2.87 Å. There are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with twelve KO12 cuboctahedra, faces with two equivalent KO12 cuboctahedra, faces with four equivalent NaO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.80–2.84 Å. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with four equivalent NaO12 cuboctahedra, corners with eight KO12 cuboctahedra, faces with two equivalent NaO12 cuboctahedra, faces with four KO12 cuboctahedra, faces with four NbO6 octahedra, and faces with four WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.81–2.86 Å. There are three inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four WO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Nb–O bond distances ranging from 2.00–2.07 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four equivalent WO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Nb–O bond distances ranging from 1.99–2.04 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Nb–O bond distances ranging from 2.01–2.03 Å. There are three inequivalent W5+ sites. In the first W5+ site, W5+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of W–O bond distances ranging from 1.99–2.08 Å. In the second W5+ site, W5+ is bonded to six O2- atoms to form WO6 octahedra that share corners with two equivalent WO6 octahedra, corners with four equivalent NbO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of W–O bond distances ranging from 1.95–1.97 Å. In the third W5+ site, W5+ is bonded to six O2- atoms to form WO6 octahedra that share corners with two equivalent WO6 octahedra, corners with four NbO6 octahedra, faces with three NaO12 cuboctahedra, and faces with five KO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of W–O bond distances ranging from 1.98–2.04 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded to two K1+, two Na1+, and two W5+ atoms to form distorted OK2Na2W2 octahedra that share corners with four OK3NaW2 octahedra and faces with four OK2Na2W2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the second O2- site, O2- is bonded in a distorted linear geometry to two K1+, two Na1+, one Nb5+, and one W5+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to two K1+, two Na1+, one Nb5+, and one W5+ atom. In the fourth O2- site, O2- is bonded in a distorted linear geometry to two K1+, two Na1+, and two Nb5+ atoms. In the fifth O2- site, O2- is bonded to three K1+, one Na1+, and two W5+ atoms to form a mixture of distorted corner and face-sharing OK3NaW2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the sixth O2- site, O2- is bonded in a distorted linear geometry to three K1+, one Na1+, one Nb5+, and one W5+ atom. In the seventh O2- site, O2- is bonded in a distorted linear geometry to three K1+, one Na1+, one Nb5+, and one W5+ atom. In the eighth O2- site, O2- is bonded in a distorted linear geometry to three K1+, one Na1+, and two Nb5+ atoms. In the ninth O2- site, O2- is bonded to four K1+ and two W5+ atoms to form distorted OK4W2 octahedra that share edges with four equivalent OK4NbW octahedra and faces with four OK2Na2W2 octahedra. In the tenth O2- site, O2- is bonded in a distorted linear geometry to one K1+, three Na1+, and two W5+ atoms. In the eleventh O2- site, O2- is bonded to four K1+, one Nb5+, and one W5+ atom to form distorted OK4NbW octahedra that share corners with eight OK2Na2W2 octahedra, edges with two equivalent OK4W2 octahedra, and faces with two OK2Na2W2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the twelfth O2- site, O2- is bonded in a distorted linear geometry to one K1+, three Na1+, one Nb5+, and one W5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to four K1+ and two Nb5+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted linear geometry to one K1+, three Na1+, and two Nb5+ atoms.« less

Authors:

The Materials Project

Publication Date:

Sat May 02 00:00:00 EDT 2020

Other Number(s):

mp-1099943

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; K5Na3Nb4(WO6)4; K-Na-Nb-O-W

OSTI Identifier:

1475618

DOI:

https://doi.org/10.17188/1475618