Cr5B2Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to three equivalent B(1) and two equivalent Si(1) atoms. In the second Cr site, Cr(2) is bonded in a distorted square co-planar geometry to four equivalent B(1) and two equivalent Si(1) atoms. B(1) is bonded in a 9-coordinate geometry to two equivalent Cr(2), six equivalent Cr(1), and one B(1) atom. Si(1) is bonded in a 10-coordinate geometry to two equivalent Cr(2) and eight equivalent Cr(1) atoms.
Cr5B2Si crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to three equivalent B(1) and two equivalent Si(1) atoms. There are two shorter (2.16 Å) and one longer (2.21 Å) Cr(1)-B(1) bond length. Both Cr(1)-Si(1) bond lengths are 2.39 Å. In the second Cr site, Cr(2) is bonded in a distorted square co-planar geometry to four equivalent B(1) and two equivalent Si(1) atoms. All Cr(2)-B(1) bond lengths are 2.23 Å. Both Cr(2)-Si(1) bond lengths are 2.59 Å. B(1) is bonded in a 9-coordinate geometry to two equivalent Cr(2), six equivalent Cr(1), and one B(1) atom. The B(1)-B(1) bond length is 1.89 Å. Si(1) is bonded in a 10-coordinate geometry to two equivalent Cr(2) and eight equivalent Cr(1) atoms.