Li2MnSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form a mixture of edge and corner-sharing OLi2MnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra.
Li2MnSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. Both Li(1)-O(1) bond lengths are 1.93 Å. Both Li(1)-O(2) bond lengths are 2.07 Å. In the second Li site, Li(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted LiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. Both Li(2)-O(1) bond lengths are 2.07 Å. Both Li(2)-O(2) bond lengths are 2.03 Å. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Both Mn(1)-O(1) bond lengths are 2.05 Å. Both Mn(1)-O(2) bond lengths are 2.10 Å. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. Both Si(1)-O(1) bond lengths are 1.66 Å. Both Si(1)-O(2) bond lengths are 1.66 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form a mixture of edge and corner-sharing OLi2MnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra.