Li2ZnSiO4 is beta beryllia-derived structured and crystallizes in the monoclinic P2_1/c 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 two equivalent Li(2)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)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 two equivalent Li(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 tetrahedra. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)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 Zn(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 Zn(1), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2ZnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2ZnSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form corner-sharing OLi2ZnSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2ZnSi trigonal pyramids.
Li2ZnSiO4 is beta beryllia-derived structured and crystallizes in the monoclinic P2_1/c 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 two equivalent Li(2)O4 tetrahedra, corners with four equivalent Zn(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The Li(1)-O(1) bond length is 1.98 Å. The Li(1)-O(2) bond length is 2.03 Å. The Li(1)-O(3) bond length is 1.96 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 two equivalent Li(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 tetrahedra. The Li(2)-O(1) bond length is 2.05 Å. The Li(2)-O(2) bond length is 1.99 Å. The Li(2)-O(3) bond length is 1.96 Å. The Li(2)-O(4) bond length is 2.07 Å. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The Zn(1)-O(1) bond length is 2.03 Å. The Zn(1)-O(2) bond length is 1.97 Å. The Zn(1)-O(3) bond length is 1.97 Å. The Zn(1)-O(4) bond length is 1.99 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 Zn(1)O4 tetrahedra. The Si(1)-O(1) bond length is 1.66 Å. The Si(1)-O(2) bond length is 1.66 Å. The Si(1)-O(3) bond length is 1.66 Å. The Si(1)-O(4) bond length is 1.65 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2ZnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2ZnSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form corner-sharing OLi2ZnSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Zn(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2ZnSi trigonal pyramids.