Materials Data on TlAgI2 by Materials Project
AgTlI2 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Ag1+ is bonded to four equivalent I1- atoms to form distorted edge-sharing AgI4 tetrahedra. All Ag–I bond lengths are 2.90 Å. Tl1+ is bonded in a 8-coordinate geometry to eight equivalent I1- atoms. All Tl–I bond lengths are 3.70 Å. I1- is bonded in a 2-coordinate geometry to two equivalent Ag1+ and four equivalent Tl1+ atoms.
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