The compound described by TbOFeAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Tb(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 edge and corner-sharing FeAs4 tetrahedra. As(1) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Fe(1) atoms. O(1) is bonded to four equivalent Tb(1) atoms to form a mixture of edge and corner-sharing OTb4 tetrahedra. is represented by the CIF file [CIF]
data_TbFeAsO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.972
_cell_length_b   3.972
_cell_length_c   9.097
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   143.482
_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
  Tb  Tb0  1  0.000  0.500  0.879  1.0
  Tb  Tb1  1  0.500  0.000  0.121  1.0
  Fe  Fe2  1  0.000  0.000  0.500  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  As  As4  1  0.000  0.500  0.315  1.0
  As  As5  1  0.500  0.000  0.685  1.0
  O  O6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.500  0.500  0.000  1.0
[/CIF]
.
The compound described by TbOFeAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Tb(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 edge and corner-sharing FeAs4 tetrahedra. As(1) is bonded in a 8-coordinate geometry to four equivalent Tb(1) and four equivalent Fe(1) atoms. O(1) is bonded to four equivalent Tb(1) atoms to form a mixture of edge and corner-sharing OTb4 tetrahedra. is represented by the CIF file [CIF]
data_TbFeAsO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.972
_cell_length_b   3.972
_cell_length_c   9.097
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   143.482
_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
  Tb  Tb0  1  0.000  0.500  0.879  1.0
  Tb  Tb1  1  0.500  0.000  0.121  1.0
  Fe  Fe2  1  0.000  0.000  0.500  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  As  As4  1  0.000  0.500  0.315  1.0
  As  As5  1  0.500  0.000  0.685  1.0
  O  O6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.500  0.500  0.000  1.0
[/CIF]
.