data_[Sr2Mg4Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Mg  1.3100  1.5000  0.8600
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [4.6633]
_cell_length_b [4.3358]
_cell_length_c [11.3869]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.2967]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Sr(MgSi)2]
_chemical_formula_sum '[Sr2 Mg4 Si4]'
_cell_volume [229.5876]
_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
[
  Sr  Sr0  2  0.3039  0.7500  0.7457  1.0
  Mg  Mg1  2  0.1630  0.7500  0.1251  1.0
  Mg  Mg2  2  0.2493  0.2500  0.5014  1.0
  Si  Si3  2  0.2253  0.7500  0.3591  1.0
  Si  Si4  2  0.3554  0.2500  0.9899  1.0
]