Li2Fe2Si3O10 crystallizes in the orthorhombic Fdd2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Fe(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Fe(1), and one Si(1) atom.
Li2Fe2Si3O10 crystallizes in the orthorhombic Fdd2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. The Li(1)-O(2) bond length is 2.12 Å. The Li(1)-O(3) bond length is 2.14 Å. The Li(1)-O(4) bond length is 2.42 Å. The Li(1)-O(5) bond length is 2.03 Å. Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Si(1)O4 tetrahedra. The Fe(1)-O(1) bond length is 1.86 Å. The Fe(1)-O(2) bond length is 1.91 Å. The Fe(1)-O(3) bond length is 1.90 Å. The Fe(1)-O(5) bond length is 1.90 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Fe(1)O4 tetrahedra. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.65 Å. The Si(1)-O(5) bond length is 1.62 Å. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. Both Si(2)-O(1) bond lengths are 1.62 Å. Both Si(2)-O(4) bond lengths are 1.66 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Fe(1), and one Si(1) atom.