Materials Data on Tl2SiF6 by Materials Project
Tl2SiF6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Tl1+ is bonded to twelve equivalent F1- atoms to form distorted TlF12 cuboctahedra that share corners with twelve equivalent TlF12 cuboctahedra, faces with six equivalent TlF12 cuboctahedra, and faces with four equivalent SiF6 octahedra. All Tl–F bond lengths are 3.09 Å. Si4+ is bonded to six equivalent F1- atoms to form SiF6 octahedra that share faces with eight equivalent TlF12 cuboctahedra. All Si–F bond lengths are 1.72 Å. F1- is bonded in a single-bond geometry to four equivalent Tl1+ and one Si4+ atom.
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