BaAl2Si2 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a body-centered cubic geometry to eight equivalent Si(1) atoms. Al(1) is bonded to four equivalent Si(1) atoms to form a mixture of edge and corner-sharing AlSi4 tetrahedra. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ba(1) and four equivalent Al(1) atoms.
BaAl2Si2 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a body-centered cubic geometry to eight equivalent Si(1) atoms. All Ba(1)-Si(1) bond lengths are 3.50 Å. Al(1) is bonded to four equivalent Si(1) atoms to form a mixture of edge and corner-sharing AlSi4 tetrahedra. All Al(1)-Si(1) bond lengths are 2.54 Å. Si(1) is bonded in a 8-coordinate geometry to four equivalent Ba(1) and four equivalent Al(1) atoms.