SiCs crystallizes in the tetragonal I4_1/acd space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to eight equivalent Si(1) atoms. In the second Cs site, Cs(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to three equivalent Cs(2), four equivalent Cs(1), and three equivalent Si(1) atoms.
SiCs crystallizes in the tetragonal I4_1/acd space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to eight equivalent Si(1) atoms. There are a spread of Cs(1)-Si(1) bond distances ranging from 3.74-4.07 Å. In the second Cs site, Cs(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. There are a spread of Cs(2)-Si(1) bond distances ranging from 3.81-3.97 Å. Si(1) is bonded in a 10-coordinate geometry to three equivalent Cs(2), four equivalent Cs(1), and three equivalent Si(1) atoms. There are two shorter (2.41 Å) and one longer (2.42 Å) Si(1)-Si(1) bond length.