LiSrAl2B2O7 crystallizes in the trigonal R3 space group. Li(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(3) atoms. Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(3) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing AlO4 tetrahedra. In the second Al site, Al(2) is bonded to one O(2) and three equivalent O(3) atoms to form distorted corner-sharing AlO4 trigonal pyramids. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to three equivalent O(3) atoms. In the second B site, B(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(1), and one B(2) atom. In the second O site, O(2) is bonded in a linear geometry to one Al(1) and one Al(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(2), and one B(1) atom.
LiSrAl2B2O7 crystallizes in the trigonal R3 space group. Li(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(3) atoms. All Li(1)-O(1) bond lengths are 2.05 Å. All Li(1)-O(3) bond lengths are 2.19 Å. Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(3) atoms. All Sr(1)-O(1) bond lengths are 2.50 Å. All Sr(1)-O(3) bond lengths are 2.79 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing AlO4 tetrahedra. The Al(1)-O(2) bond length is 1.70 Å. All Al(1)-O(1) bond lengths are 1.79 Å. In the second Al site, Al(2) is bonded to one O(2) and three equivalent O(3) atoms to form distorted corner-sharing AlO4 trigonal pyramids. The Al(2)-O(2) bond length is 1.66 Å. All Al(2)-O(3) bond lengths are 1.82 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to three equivalent O(3) atoms. All B(1)-O(3) bond lengths are 1.40 Å. In the second B site, B(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(1) atoms. All B(2)-O(1) bond lengths are 1.49 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(1), and one B(2) atom. In the second O site, O(2) is bonded in a linear geometry to one Al(1) and one Al(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(2), and one B(1) atom.