data_[Rb2Mg2Cu2S4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Mg  1.3100  1.5000  0.8600
  Cu  1.9000  1.3500  0.8200
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P2/c]
_cell_length_a [7.6304]
_cell_length_b [5.6914]
_cell_length_c [6.3473]
_cell_angle_alpha [90.0000]
_cell_angle_beta [112.8886]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [RbMgCuS2]
_chemical_formula_sum '[Rb2 Mg2 Cu2 S4]'
_cell_volume [253.9435]
_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  2  0.5000  0.2318  0.7500  1.0
  Mg  Mg1  2  0.0000  0.4994  0.2500  1.0
  Cu  Cu2  2  0.0000  0.0000  0.0000  1.0
  S  S3  4  0.2093  0.2801  0.0976  1.0
]