The material described by LaSe3 crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded to twelve equivalent Se(1) atoms to form a mixture of face and corner-sharing LaSe12 cuboctahedra. Se(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Se(1) atoms. is represented by the CIF card [CIF]
data_LaSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.102
_cell_length_b   6.102
_cell_length_c   6.052
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   195.133
_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
  La  La0  1  0.667  0.333  0.250  1.0
  La  La1  1  0.333  0.667  0.750  1.0
  Se  Se2  1  0.826  0.174  0.750  1.0
  Se  Se3  1  0.347  0.174  0.750  1.0
  Se  Se4  1  0.826  0.653  0.750  1.0
  Se  Se5  1  0.174  0.826  0.250  1.0
  Se  Se6  1  0.653  0.826  0.250  1.0
  Se  Se7  1  0.174  0.347  0.250  1.0
[/CIF]
.
The material described by LaSe3 crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded to twelve equivalent Se(1) atoms to form a mixture of face and corner-sharing LaSe12 cuboctahedra. Se(1) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Se(1) atoms. is represented by the CIF card [CIF]
data_LaSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.102
_cell_length_b   6.102
_cell_length_c   6.052
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   195.133
_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
  La  La0  1  0.667  0.333  0.250  1.0
  La  La1  1  0.333  0.667  0.750  1.0
  Se  Se2  1  0.826  0.174  0.750  1.0
  Se  Se3  1  0.347  0.174  0.750  1.0
  Se  Se4  1  0.826  0.653  0.750  1.0
  Se  Se5  1  0.174  0.826  0.250  1.0
  Se  Se6  1  0.653  0.826  0.250  1.0
  Se  Se7  1  0.174  0.347  0.250  1.0
[/CIF]
.