Li(YSi)2 crystallizes in the tetragonal P4/mbm space group. Li(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. Y(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Li(1), six equivalent Y(1), and one Si(1) atom.
Li(YSi)2 crystallizes in the tetragonal P4/mbm space group. Li(1) is bonded in a distorted square co-planar geometry to four equivalent Si(1) atoms. All Li(1)-Si(1) bond lengths are 2.86 Å. Y(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. There are two shorter (2.93 Å) and four longer (3.02 Å) Y(1)-Si(1) bond lengths. Si(1) is bonded in a 9-coordinate geometry to two equivalent Li(1), six equivalent Y(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.39 Å.