Ba2MgLa2Ti3O12 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R-3m space group. Ba(1) is bonded to three equivalent O(1) and nine equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent La(1)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra,  a faceface with one Mg(1)O6 octahedra, faces with three equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Ti(2)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. La(1) is bonded to three equivalent O(2) and nine equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent La(1)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra,  a faceface with one Ti(1)O6 octahedra, faces with three equivalent Mg(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to six equivalent O(2) atoms to form TiO6 octahedra that share corners with six equivalent Ti(2)O6 octahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. In the second Ti site, Ti(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form TiO6 octahedra that share corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Ti(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(1), one Mg(1), three equivalent La(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to three equivalent Ba(1), one La(1), one Ti(1), and one Ti(2) atom.
Ba2MgLa2Ti3O12 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R-3m space group. Ba(1) is bonded to three equivalent O(1) and nine equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent La(1)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra,  a faceface with one Mg(1)O6 octahedra, faces with three equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. All Ba(1)-O(1) bond lengths are 2.89 Å. There are six shorter (2.84 Å) and three longer (2.90 Å) Ba(1)-O(2) bond lengths. Mg(1) is bonded to six equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Ti(2)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with six equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. All Mg(1)-O(1) bond lengths are 2.05 Å. La(1) is bonded to three equivalent O(2) and nine equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent La(1)O12 cuboctahedra, faces with three equivalent Ba(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra,  a faceface with one Ti(1)O6 octahedra, faces with three equivalent Mg(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. All La(1)-O(2) bond lengths are 2.76 Å. There are three shorter (2.69 Å) and six longer (2.85 Å) La(1)-O(1) bond lengths. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to six equivalent O(2) atoms to form TiO6 octahedra that share corners with six equivalent Ti(2)O6 octahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. All Ti(1)-O(2) bond lengths are 1.99 Å. In the second Ti site, Ti(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form TiO6 octahedra that share corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Ti(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 3°. All Ti(2)-O(1) bond lengths are 1.91 Å. All Ti(2)-O(2) bond lengths are 2.05 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(1), one Mg(1), three equivalent La(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to three equivalent Ba(1), one La(1), one Ti(1), and one Ti(2) atom.