Li2MgGeO4 is Theoretical Carbon Structure-derived structured and crystallizes in the orthorhombic Pna2_1 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 two equivalent Mg(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Mg(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 two equivalent Li(1)O4 tetrahedra, corners with four equivalent Mg(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Mg(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 Mg(1), and one Ge(1) atom to form corner-sharing OLi2MgGe tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe trigonal pyramids.
Li2MgGeO4 is Theoretical Carbon Structure-derived structured and crystallizes in the orthorhombic Pna2_1 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 two equivalent Mg(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The Li(1)-O(1) bond length is 1.97 Å. The Li(1)-O(2) bond length is 2.05 Å. The Li(1)-O(3) bond length is 2.01 Å. The Li(1)-O(4) bond length is 2.07 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 four equivalent Mg(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The Li(2)-O(1) bond length is 1.99 Å. The Li(2)-O(2) bond length is 2.02 Å. The Li(2)-O(3) bond length is 2.04 Å. The Li(2)-O(4) bond length is 1.98 Å. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The Mg(1)-O(1) bond length is 1.96 Å. The Mg(1)-O(2) bond length is 2.01 Å. The Mg(1)-O(3) bond length is 1.97 Å. The Mg(1)-O(4) bond length is 1.98 Å. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Li(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and corners with four equivalent Mg(1)O4 tetrahedra. The Ge(1)-O(1) bond length is 1.79 Å. The Ge(1)-O(2) bond length is 1.78 Å. The Ge(1)-O(3) bond length is 1.78 Å. The Ge(1)-O(4) bond length is 1.77 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form corner-sharing OLi2MgGe tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Mg(1), and one Ge(1) atom to form a mixture of edge and corner-sharing OLi2MgGe trigonal pyramids.