LaSeF crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded in a trigonal planar geometry to six equivalent Se(1) and three equivalent F(1) atoms. Se(1) is bonded to six equivalent La(1) atoms to form a mixture of face, corner, and edge-sharing SeLa6 octahedra. The corner-sharing octahedral tilt angles are 45°. F(1) is bonded in a trigonal planar geometry to three equivalent La(1) atoms.
LaSeF crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded in a trigonal planar geometry to six equivalent Se(1) and three equivalent F(1) atoms. All La(1)-Se(1) bond lengths are 3.19 Å. All La(1)-F(1) bond lengths are 2.44 Å. Se(1) is bonded to six equivalent La(1) atoms to form a mixture of face, corner, and edge-sharing SeLa6 octahedra. The corner-sharing octahedral tilt angles are 45°. F(1) is bonded in a trigonal planar geometry to three equivalent La(1) atoms.