FeSe crystallizes in the hexagonal P6_3/mmc space group. Fe(1) is bonded to six equivalent Se(1) atoms to form a mixture of distorted face, corner, and edge-sharing FeSe6 octahedra. The corner-sharing octahedral tilt angles are 51°. Se(1) is bonded in a 6-coordinate geometry to six equivalent Fe(1) atoms.
FeSe crystallizes in the hexagonal P6_3/mmc space group. Fe(1) is bonded to six equivalent Se(1) atoms to form a mixture of distorted face, corner, and edge-sharing FeSe6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Fe(1)-Se(1) bond lengths are 2.53 Å. Se(1) is bonded in a 6-coordinate geometry to six equivalent Fe(1) atoms.