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LaGa2 is hexagonal omega structure structured and crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. La is bonded to twelve equivalent Ga atoms to form a mixture of edge and face-sharing LaGa12 cuboctahedra. All La–Ga bond lengths are 3.35 Å. Ga is bonded in a 9-coordinate geometry to six equivalent La and three equivalent Ga atoms. All Ga–Ga bond lengths are 2.50 Å.
La3Ga is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. La is bonded to eight equivalent La and four equivalent Ga atoms to form distorted LaLa8Ga4 cuboctahedra that share corners with twelve equivalent LaLa8Ga4 cuboctahedra, edges with eight equivalent GaLa12 cuboctahedra, edges with sixteen equivalent LaLa8Ga4 cuboctahedra, faces with four equivalent GaLa12 cuboctahedra, and faces with fourteen equivalent LaLa8Ga4 cuboctahedra. All La–La bond lengths are 3.49 Å. All La–Ga bond lengths are 3.49 Å. Ga is bonded to twelve equivalent La atoms to form GaLa12 cuboctahedra that share corners with twelve equivalent GaLa12 cuboctahedra, edges with twenty-four equivalent LaLa8Ga4 cuboctahedra, faces with six equivalent GaLa12 cuboctahedra, and faces with twelve equivalent LaLa8Ga4 cuboctahedra.
Ga(La) crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. La is bonded in a 7-coordinate geometry to seven equivalent Ga atoms. There are a spread of La–Ga bond distances ranging from 3.23–3.41 Å. Ga is bonded in a 9-coordinate geometry to seven equivalent La and two equivalent Ga atoms. Both Ga–Ga bond lengths are 2.64 Å.
LaGa6 crystallizes in the tetragonal P4/nbm space group. The structure is three-dimensional. La is bonded to twelve Ga atoms to form a mixture of distorted edge and face-sharing LaGa12 cuboctahedra. There are four shorter (3.21 Å) and eight longer (3.30 Å) La–Ga bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga is bonded in a 9-coordinate geometry to four equivalent La and five Ga atoms. There are one shorter (2.51 Å) and four longer (2.63 Å) Ga–Ga bond lengths. In the second Ga site, Ga is bonded in a 4-coordinate geometry to one La and three Ga atoms. The Ga–Ga bond length is 2.52 Å.