Li2Ba(MgSi)2 crystallizes in the trigonal R-3m space group. Li(1) is bonded in a 6-coordinate geometry to three equivalent Ba(1), three equivalent Mg(1), and three equivalent Si(1) atoms. Ba(1) is bonded in a 14-coordinate geometry to six equivalent Li(1), two equivalent Mg(1), and six equivalent Si(1) atoms. Mg(1) is bonded in a 7-coordinate geometry to three equivalent Li(1), one Ba(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to three equivalent Li(1), three equivalent Ba(1), and four equivalent Mg(1) atoms.
Li2Ba(MgSi)2 crystallizes in the trigonal R-3m space group. Li(1) is bonded in a 6-coordinate geometry to three equivalent Ba(1), three equivalent Mg(1), and three equivalent Si(1) atoms. All Li(1)-Ba(1) bond lengths are 3.65 Å. All Li(1)-Mg(1) bond lengths are 2.84 Å. All Li(1)-Si(1) bond lengths are 2.65 Å. Ba(1) is bonded in a 14-coordinate geometry to six equivalent Li(1), two equivalent Mg(1), and six equivalent Si(1) atoms. Both Ba(1)-Mg(1) bond lengths are 3.55 Å. All Ba(1)-Si(1) bond lengths are 3.56 Å. Mg(1) is bonded in a 7-coordinate geometry to three equivalent Li(1), one Ba(1), and four equivalent Si(1) atoms. There is one shorter (2.78 Å) and three longer (2.89 Å) Mg(1)-Si(1) bond lengths. Si(1) is bonded in a 10-coordinate geometry to three equivalent Li(1), three equivalent Ba(1), and four equivalent Mg(1) atoms.