[CIF]
data_Mg7Si4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.42980409
_cell_length_b   6.21263671
_cell_length_c   13.50450705
_cell_angle_alpha   101.30823810
_cell_angle_beta   98.50937313
_cell_angle_gamma   91.08675545
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg7Si4
_chemical_formula_sum   'Mg14 Si8'
_cell_volume   441.25047184
_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
  Mg  Mg0  1  -1.61502457  2.23885551  10.55920984  1
  Mg  Mg1  1  -0.49887294  -0.79794706  9.89977877  1
  Mg  Mg2  1  2.51105006  4.13928372  8.05083781  1
  Mg  Mg3  1  1.78333856  0.86382546  8.57094214  1
  Mg  Mg4  1  0.13469249  2.32058869  0.04390966  1
  Mg  Mg5  1  3.19215217  3.54910029  5.13921926  1
  Mg  Mg6  1  0.76361888  3.67723850  3.12415234  1
  Mg  Mg7  1  3.10427076  0.39284929  5.67820767  1
  Mg  Mg8  1  0.99282827  0.99559285  11.98366450  1
  Mg  Mg9  1  0.63178855  -2.08874712  12.62517136  1
  Mg  Mg10  1  -0.18355336  5.41513006  0.56432837  1
  Mg  Mg11  1  1.42398698  0.60186856  3.01656519  1
  Mg  Mg12  1  0.50641412  2.06606540  5.73881147  1
  Mg  Mg13  1  0.43703967  -1.01078866  6.04266020  1
  Si  Si14  1  2.60211666  4.87823422  1.46992995  1
  Si  Si15  1  1.06874369  3.02860395  10.16215963  1
  Si  Si16  1  2.29096162  -1.07022802  10.61974207  1
  Si  Si17  1  4.27383794  1.70744779  3.37372767  1
  Si  Si18  1  2.92219414  2.49508433  1.51157274  1
  Si  Si19  1  -0.27533456  3.34815973  8.04928958  1
  Si  Si20  1  -0.93861503  1.01950199  7.89801308  1
  Si  Si21  1  4.11037029  5.51411055  3.29670068  1
[/CIF]
