Materials Data on Na2TcF6 by Materials Project
Na2TcF6 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Na1+ is bonded to twelve equivalent F1- atoms to form distorted NaF12 cuboctahedra that share corners with six equivalent NaF12 cuboctahedra, corners with three equivalent TcF6 octahedra, faces with eight equivalent NaF12 cuboctahedra, and faces with three equivalent TcF6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are a spread of Na–F bond distances ranging from 2.51–2.90 Å. Tc4+ is bonded to six equivalent F1- atoms to form TcF6 octahedra that share corners with six equivalent NaF12 cuboctahedra and faces with six equivalent NaF12 cuboctahedra. All Tc–F bond lengths are 1.97 Å. F1- is bonded in a 1-coordinate geometry to four equivalent Na1+ and one Tc4+ atom.