Materials Data on Tl6Si2O7 by Materials Project
Tl6Si2O7 crystallizes in the trigonal P-3 space group. The structure is three-dimensional. there are two inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Tl–O bond distances ranging from 2.46–3.03 Å. In the second Tl1+ site, Tl1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Tl–O bond distances ranging from 2.52–2.54 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.65 Å) and one longer (1.67 Å) Si–O bond length. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.65 Å) and one longer (1.67 Å) Si–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Tl1+ and one Si4+ atom. In the second O2- site, O2- is bonded in a linear geometry to three equivalent Tl1+ and two Si4+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Tl1+ and one Si4+ atom.