data_Rb4SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.83
_cell_length_b   6.92
_cell_length_c   9.46
_cell_angle_alpha   81.89
_cell_angle_beta   73.47
_cell_angle_gamma   62.45
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb4SiO4
_chemical_formula_sum   'Rb8 Si2 O8'
_cell_volume   379.97
_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
  Rb  Rb0  1  0.58  0.54  0.74  1.0
  Rb  Rb1  1  0.24  0.54  0.07  1.0
  Rb  Rb2  1  0.22  0.85  0.24  1.0
  Rb  Rb3  1  0.86  0.71  0.34  1.0
  Rb  Rb4  1  0.86  0.53  0.73  1.0
  Rb  Rb5  1  0.5  0.39  0.83  1.0
  Rb  Rb6  1  0.48  0.69  0.0  1.0
  Rb  Rb7  1  0.14  0.69  0.33  1.0
  Si  Si8  1  0.33  0.76  0.79  1.0
  Si  Si9  1  0.39  0.47  0.28  1.0
  O  O10  1  0.11  0.74  0.9  1.0
  O  O11  1  0.65  0.79  0.65  1.0
  O  O12  1  0.09  0.92  0.54  1.0
  O  O13  1  0.14  0.53  0.01  1.0
  O  O14  1  0.58  0.7  0.06  1.0
  O  O15  1  0.63  0.31  0.53  1.0
  O  O16  1  0.07  0.44  0.42  1.0
  O  O17  1  0.61  0.49  0.17  1.0

data_Rb4SiO4
_symmetry_space_group_name_H-M   P-1
_cell_length_a   6.83
_cell_length_b   6.92
_cell_length_c   9.46
_cell_angle_alpha   81.89
_cell_angle_beta   73.47
_cell_angle_gamma   62.45
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Rb4SiO4
_chemical_formula_sum   'Rb8 Si2 O8'
_cell_volume   379.97
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Rb  Rb0  2  0.12  0.57  0.97  1.0
  Rb  Rb1  2  0.14  0.27  0.8  1.0
  Rb  Rb2  2  0.22  0.43  0.7  1.0
  Rb  Rb3  2  0.5  0.41  0.7  1.0
  Si  Si4  2  0.03  0.35  0.25  1.0
  O  O5  2  0.22  0.59  0.03  1.0
  O  O6  2  0.25  0.37  0.13  1.0
  O  O7  2  0.27  0.19  0.49  1.0
  O  O8  2  0.29  0.68  0.61  1.0

Rb Rb Rb Rb Rb Rb Rb Rb Si Si O O O O O O O O