Li4Si2O7 crystallizes in the tetragonal P-42_1m space group. Li(1) is bonded in a rectangular see-saw-like geometry to one O(2) and three equivalent O(3) atoms. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing SiO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Li(1) and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to three equivalent Li(1) and one Si(1) atom.
Li4Si2O7 crystallizes in the tetragonal P-42_1m space group. Li(1) is bonded in a rectangular see-saw-like geometry to one O(2) and three equivalent O(3) atoms. The Li(1)-O(2) bond length is 1.92 Å. There are a spread of Li(1)-O(3) bond distances ranging from 1.97-2.03 Å. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.63 Å. Both Si(1)-O(3) bond lengths are 1.63 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Li(1) and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to three equivalent Li(1) and one Si(1) atom.