Li2BeSiO4 is Stannite-like structured and crystallizes in the monoclinic Pc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Be(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Be(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Be(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form BeO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Be(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form distorted corner-sharing OLi2BeSi tetrahedra.
Li2BeSiO4 is Stannite-like structured and crystallizes in the monoclinic Pc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Be(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The Li(1)-O(1) bond length is 1.97 Å. The Li(1)-O(2) bond length is 1.93 Å. The Li(1)-O(3) bond length is 1.98 Å. The Li(1)-O(4) bond length is 1.96 Å. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form LiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Be(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The Li(2)-O(1) bond length is 1.94 Å. The Li(2)-O(2) bond length is 1.92 Å. The Li(2)-O(3) bond length is 1.99 Å. The Li(2)-O(4) bond length is 1.97 Å. Be(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form BeO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The Be(1)-O(1) bond length is 1.63 Å. The Be(1)-O(2) bond length is 1.64 Å. The Be(1)-O(3) bond length is 1.66 Å. The Be(1)-O(4) bond length is 1.65 Å. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Be(1)O4 tetrahedra. The Si(1)-O(1) bond length is 1.63 Å. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(3) bond length is 1.63 Å. The Si(1)-O(4) bond length is 1.63 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form corner-sharing OLi2BeSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Be(1), and one Si(1) atom to form distorted corner-sharing OLi2BeSi tetrahedra.