Materials Data on NaEuTiNbO6F by Materials Project
NaEuTiNbO6F crystallizes in the tetragonal P4_322 space group. The structure is three-dimensional. Na1+ is bonded to six O2- and two equivalent F1- atoms to form distorted NaO6F2 hexagonal bipyramids that share edges with two equivalent NaO6F2 hexagonal bipyramids, edges with four equivalent EuO6F2 hexagonal bipyramids, edges with two equivalent TiO6 octahedra, and edges with four equivalent NbO6 octahedra. There are a spread of Na–O bond distances ranging from 2.60–2.75 Å. Both Na–F bond lengths are 2.21 Å. Eu3+ is bonded to six O2- and two equivalent F1- atoms to form distorted EuO6F2 hexagonal bipyramids that share edges with two equivalent EuO6F2 hexagonal bipyramids, edges with four equivalent NaO6F2 hexagonal bipyramids, edges with two equivalent NbO6 octahedra, and edges with four equivalent TiO6 octahedra. There are a spread of Eu–O bond distances ranging from 2.52–2.61 Å. Both Eu–F bond lengths are 2.31 Å. Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra, corners with four equivalent NbO6 octahedra, edges with two equivalent NaO6F2 hexagonal bipyramids, and edges with four equivalent EuO6F2 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 44–49°. There is four shorter (1.97 Å) and two longer (1.99 Å) Ti–O bond length. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four equivalent TiO6 octahedra, edges with two equivalent EuO6F2 hexagonal bipyramids, and edges with four equivalent NaO6F2 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 40–44°. There are a spread of Nb–O bond distances ranging from 1.99–2.02 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+ and two equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Eu3+, one Ti4+, and one Nb5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Eu3+ and two equivalent Ti4+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, one Eu3+, one Ti4+, and one Nb5+ atom. F1- is bonded to two equivalent Na1+ and two equivalent Eu3+ atoms to form corner-sharing FNa2Eu2 tetrahedra.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- MIT; UC Berkeley; Duke; U Louvain
- DOE Contract Number:
- AC02-05CH11231; EDCBEE
- OSTI ID:
- 1208049
- Report Number(s):
- mp-43048
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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