BaAl2Si2 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Al(1) is bonded in a 3-coordinate geometry to three equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent Ba(1), three equivalent Al(1), and one Si(1) atom.
BaAl2Si2 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. There are two shorter (3.34 Å) and four longer (3.39 Å) Ba(1)-Si(1) bond lengths. Al(1) is bonded in a 3-coordinate geometry to three equivalent Si(1) atoms. There are two shorter (2.55 Å) and one longer (2.57 Å) Al(1)-Si(1) bond length. Si(1) is bonded in a 7-coordinate geometry to three equivalent Ba(1), three equivalent Al(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.40 Å.