Ag2PbI4 crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to two equivalent I(1) and four equivalent I(2) atoms to form AgI6 octahedra that share corners with six equivalent Ag(1)I6 octahedra, edges with four equivalent Ag(1)I6 octahedra, and edges with four equivalent Pb(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Pb(1) is bonded to two equivalent I(2) and four equivalent I(1) atoms to form PbI6 octahedra that share corners with four equivalent Pb(1)I6 octahedra and edges with eight equivalent Ag(1)I6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent I sites. In the first I site, I(1) is bonded in a square co-planar geometry to two equivalent Ag(1) and two equivalent Pb(1) atoms. In the second I site, I(2) is bonded to four equivalent Ag(1) and one Pb(1) atom to form a mixture of edge and corner-sharing IAg4Pb square pyramids.
Ag2PbI4 crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to two equivalent I(1) and four equivalent I(2) atoms to form AgI6 octahedra that share corners with six equivalent Ag(1)I6 octahedra, edges with four equivalent Ag(1)I6 octahedra, and edges with four equivalent Pb(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Both Ag(1)-I(1) bond lengths are 3.14 Å. All Ag(1)-I(2) bond lengths are 3.19 Å. Pb(1) is bonded to two equivalent I(2) and four equivalent I(1) atoms to form PbI6 octahedra that share corners with four equivalent Pb(1)I6 octahedra and edges with eight equivalent Ag(1)I6 octahedra. The corner-sharing octahedra are not tilted. Both Pb(1)-I(2) bond lengths are 3.21 Å. All Pb(1)-I(1) bond lengths are 3.19 Å. There are two inequivalent I sites. In the first I site, I(1) is bonded in a square co-planar geometry to two equivalent Ag(1) and two equivalent Pb(1) atoms. In the second I site, I(2) is bonded to four equivalent Ag(1) and one Pb(1) atom to form a mixture of edge and corner-sharing IAg4Pb square pyramids.