The structure described by FeSe is Millerite-like structured and crystallizes in the orthorhombic Cmcm space group. Fe(1) is bonded in a 5-coordinate geometry to five equivalent Se(1) atoms. Se(1) is bonded in a 5-coordinate geometry to five equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_FeSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.037
_cell_length_b   4.037
_cell_length_c   4.401
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.591
_symmetry_Int_Tables_number   1
_cell_volume   68.001
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Fe  Fe0  1  0.904  0.096  0.750  1.0
  Fe  Fe1  1  0.096  0.904  0.250  1.0
  Se  Se2  1  0.269  0.731  0.750  1.0
  Se  Se3  1  0.731  0.269  0.250  1.0
[/CIF]
.
The structure described by FeSe is Millerite-like structured and crystallizes in the orthorhombic Cmcm space group. Fe(1) is bonded in a 5-coordinate geometry to five equivalent Se(1) atoms. Se(1) is bonded in a 5-coordinate geometry to five equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_FeSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.037
_cell_length_b   4.037
_cell_length_c   4.401
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.591
_symmetry_Int_Tables_number   1
_cell_volume   68.001
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Fe  Fe0  1  0.904  0.096  0.750  1.0
  Fe  Fe1  1  0.096  0.904  0.250  1.0
  Se  Se2  1  0.269  0.731  0.750  1.0
  Se  Se3  1  0.731  0.269  0.250  1.0
[/CIF]
.