Co3Al3Si4 crystallizes in the cubic Im-3m space group. Co(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Si(1) atoms. Al(1) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent Co(1) and four equivalent Si(1) atoms.
Co3Al3Si4 crystallizes in the cubic Im-3m space group. Co(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Si(1) atoms. All Co(1)-Al(1) bond lengths are 2.41 Å. All Co(1)-Si(1) bond lengths are 2.30 Å. Al(1) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent Co(1) and four equivalent Si(1) atoms. There is one shorter (2.48 Å) and three longer (2.59 Å) Si(1)-Si(1) bond lengths.