data_Er
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.67
_cell_length_b   8.67
_cell_length_c   8.67
_cell_angle_alpha   23.44
_cell_angle_beta   23.44
_cell_angle_gamma   23.44
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er
_chemical_formula_sum   Er3
_cell_volume   90.4
_cell_formula_units_Z   3
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
  Er  Er0  1  0.0  0.0  0.0  1.0
  Er  Er1  1  0.0  0.0  0.61  1.0
  Er  Er2  1  0.0  0.0  0.66  1.0

data_Er
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.1
_cell_length_b   3.52
_cell_length_c   8.67
_cell_angle_alpha   90.0
_cell_angle_beta   103.57
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Er
_chemical_formula_sum   Er6
_cell_volume   180.8
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Er  Er0  2  0.0  0.0  0.0  1.0
  Er  Er1  2  0.0  0.0  0.34  1.0
  Er  Er2  2  0.0  0.0  0.39  1.0

Er Er Er