Materials Data on Na3MnF6 by Materials Project
Na3MnF6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to eight F1- atoms. There are a spread of Na–F bond distances ranging from 2.27–2.97 Å. In the second Na1+ site, Na1+ is bonded to six F1- atoms to form NaF6 octahedra that share corners with six equivalent MnF6 octahedra. The corner-sharing octahedra tilt angles range from 36–41°. There are a spread of Na–F bond distances ranging from 2.29–2.35 Å. Mn3+ is bonded to six F1- atoms to form MnF6 octahedra that share corners with six equivalent NaF6 octahedra. The corner-sharing octahedra tilt angles range from 36–41°. There are a spread of Mn–F bond distances ranging from 1.90–2.11 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 1-coordinate geometry to four Na1+ and one Mn3+ atom. In the second F1- site, F1- is bonded in a 3-coordinate geometry to four Na1+ and one Mn3+ atom. In the third F1- site, F1- is bonded in a distorted see-saw-like geometry to three Na1+ and one Mn3+ atom.