The material described by CeFeAsO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Ce(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. Fe(1) is bonded to four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing FeAs4 tetrahedra. As(1) is bonded in a 8-coordinate geometry to four equivalent Ce(1) and four equivalent Fe(1) atoms. O(1) is bonded to four equivalent Ce(1) atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeFeAsO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.974
_cell_length_b   3.974
_cell_length_c   8.968
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   141.605
_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
  Ce  Ce0  1  0.750  0.750  0.862  1.0
  Ce  Ce1  1  0.250  0.250  0.138  1.0
  Fe  Fe2  1  0.750  0.250  0.500  1.0
  Fe  Fe3  1  0.250  0.750  0.500  1.0
  As  As4  1  0.750  0.750  0.311  1.0
  As  As5  1  0.250  0.250  0.689  1.0
  O  O6  1  0.750  0.250  0.000  1.0
  O  O7  1  0.250  0.750  0.000  1.0
[/CIF]
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The material described by CeFeAsO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Ce(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. Fe(1) is bonded to four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing FeAs4 tetrahedra. As(1) is bonded in a 8-coordinate geometry to four equivalent Ce(1) and four equivalent Fe(1) atoms. O(1) is bonded to four equivalent Ce(1) atoms to form a mixture of corner and edge-sharing OCe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeFeAsO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.974
_cell_length_b   3.974
_cell_length_c   8.968
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   141.605
_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
  Ce  Ce0  1  0.750  0.750  0.862  1.0
  Ce  Ce1  1  0.250  0.250  0.138  1.0
  Fe  Fe2  1  0.750  0.250  0.500  1.0
  Fe  Fe3  1  0.250  0.750  0.500  1.0
  As  As4  1  0.750  0.750  0.311  1.0
  As  As5  1  0.250  0.250  0.689  1.0
  O  O6  1  0.750  0.250  0.000  1.0
  O  O7  1  0.250  0.750  0.000  1.0
[/CIF]
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