CsSiI3 crystallizes in the trigonal R3m space group. Cs(1) is bonded to twelve equivalent I(1) atoms to form a mixture of corner and face-sharing CsI12 cuboctahedra. Si(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent I(1) atoms. I(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Si(1) atom.
CsSiI3 crystallizes in the trigonal R3m space group. Cs(1) is bonded to twelve equivalent I(1) atoms to form a mixture of corner and face-sharing CsI12 cuboctahedra. There are a spread of Cs(1)-I(1) bond distances ranging from 4.25-4.45 Å. Si(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent I(1) atoms. All Si(1)-I(1) bond lengths are 2.66 Å. I(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Si(1) atom.