Li1MnSiO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 73-74°. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, corners with six equivalent Si(1)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with four equivalent Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-57°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLiMn2Si tetrahedra. In the third O site, O(3) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLiMn2Si tetrahedra.
Li1MnSiO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 73-74°. The Li(1)-O(2) bond length is 2.17 Å. The Li(1)-O(3) bond length is 2.05 Å. Both Li(1)-O(1) bond lengths are 2.02 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Li(1)O4 tetrahedra, corners with six equivalent Si(1)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. Both Mn(1)-O(1) bond lengths are 1.90 Å. Both Mn(1)-O(2) bond lengths are 2.08 Å. Both Mn(1)-O(3) bond lengths are 2.26 Å. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and corners with four equivalent Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-57°. The Si(1)-O(2) bond length is 1.70 Å. The Si(1)-O(3) bond length is 1.64 Å. Both Si(1)-O(1) bond lengths are 1.64 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLiMn2Si tetrahedra. In the third O site, O(3) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLiMn2Si tetrahedra.