LiSr2MgSi3 crystallizes in the orthorhombic Cmc2_1 space group. Li(1) is bonded in a 5-coordinate geometry to two equivalent Sr(2), one Mg(1), one Si(3), and three equivalent Si(1) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. In the second Sr site, Sr(2) is bonded in a 11-coordinate geometry to two equivalent Li(1), three equivalent Mg(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. Mg(1) is bonded in a 5-coordinate geometry to one Li(1), three equivalent Sr(2), one Si(2), and three equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Li(1), one Sr(1), two equivalent Sr(2), and three equivalent Mg(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), one Mg(1), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Li(1), two equivalent Sr(2), four equivalent Sr(1), and two equivalent Si(2) atoms.
LiSr2MgSi3 crystallizes in the orthorhombic Cmc2_1 space group. Li(1) is bonded in a 5-coordinate geometry to two equivalent Sr(2), one Mg(1), one Si(3), and three equivalent Si(1) atoms. Both Li(1)-Sr(2) bond lengths are 3.17 Å. The Li(1)-Mg(1) bond length is 2.83 Å. The Li(1)-Si(3) bond length is 2.94 Å. There is one shorter (2.73 Å) and two longer (2.76 Å) Li(1)-Si(1) bond lengths. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. The Sr(1)-Si(1) bond length is 3.22 Å. There are two shorter (3.32 Å) and two longer (3.36 Å) Sr(1)-Si(2) bond lengths. There are two shorter (3.32 Å) and two longer (3.34 Å) Sr(1)-Si(3) bond lengths. In the second Sr site, Sr(2) is bonded in a 11-coordinate geometry to two equivalent Li(1), three equivalent Mg(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There is one shorter (3.29 Å) and two longer (3.34 Å) Sr(2)-Mg(1) bond lengths. Both Sr(2)-Si(1) bond lengths are 3.36 Å. Both Sr(2)-Si(2) bond lengths are 3.30 Å. Both Sr(2)-Si(3) bond lengths are 3.24 Å. Mg(1) is bonded in a 5-coordinate geometry to one Li(1), three equivalent Sr(2), one Si(2), and three equivalent Si(1) atoms. The Mg(1)-Si(2) bond length is 2.86 Å. There are two shorter (2.76 Å) and one longer (2.77 Å) Mg(1)-Si(1) bond length. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Li(1), one Sr(1), two equivalent Sr(2), and three equivalent Mg(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), one Mg(1), and two equivalent Si(3) atoms. There is one shorter (2.37 Å) and one longer (2.38 Å) Si(2)-Si(3) bond length. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to one Li(1), two equivalent Sr(2), four equivalent Sr(1), and two equivalent Si(2) atoms.