La4Li2O7 crystallizes in the trigonal P-31m space group. The structure consists of two 7439-93-2 atoms inside a La4O7 framework. In the La4O7 framework, there are two inequivalent La sites. In the first La site, La(1) is bonded to one O(2) and three equivalent O(1) atoms to form LaO4 trigonal pyramids that share corners with six equivalent La(2)O6 octahedra and  a cornercorner with one La(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 65°. In the second La site, La(2) is bonded to six equivalent O(1) atoms to form LaO6 octahedra that share corners with six equivalent La(1)O4 trigonal pyramids and edges with three equivalent La(2)O6 octahedra. There are two inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to two equivalent La(1) atoms. In the second O site, O(1) is bonded in a trigonal non-coplanar geometry to one La(1) and two equivalent La(2) atoms.
La4Li2O7 crystallizes in the trigonal P-31m space group. The structure consists of two 7439-93-2 atoms inside a La4O7 framework. In the La4O7 framework, there are two inequivalent La sites. In the first La site, La(1) is bonded to one O(2) and three equivalent O(1) atoms to form LaO4 trigonal pyramids that share corners with six equivalent La(2)O6 octahedra and  a cornercorner with one La(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 65°. The La(1)-O(2) bond length is 2.09 Å. All La(1)-O(1) bond lengths are 2.34 Å. In the second La site, La(2) is bonded to six equivalent O(1) atoms to form LaO6 octahedra that share corners with six equivalent La(1)O4 trigonal pyramids and edges with three equivalent La(2)O6 octahedra. All La(2)-O(1) bond lengths are 2.44 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to two equivalent La(1) atoms. In the second O site, O(1) is bonded in a trigonal non-coplanar geometry to one La(1) and two equivalent La(2) atoms.