# generated using pymatgen
data_Mg3Si2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.41670154
_cell_length_b   5.41670154
_cell_length_c   14.53464400
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   119.99999432
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg3Si2O9
_chemical_formula_sum   'Mg6 Si4 O18'
_cell_volume   369.32173577
_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  0.64447100  0.00000000  0.27961300  1.0
  Mg  Mg1  1  0.35552900  0.35552900  0.27961300  1.0
  Mg  Mg2  1  0.00000000  0.64447100  0.27961300  1.0
  Mg  Mg3  1  0.35552900  0.00000000  0.77961300  1.0
  Mg  Mg4  1  0.64447100  0.64447100  0.77961300  1.0
  Mg  Mg5  1  0.00000000  0.35552900  0.77961300  1.0
  Si  Si6  1  0.66666700  0.33333300  0.47437700  1.0
  Si  Si7  1  0.33333300  0.66666700  0.47437700  1.0
  Si  Si8  1  0.33333300  0.66666700  0.97437700  1.0
  Si  Si9  1  0.66666700  0.33333300  0.97437700  1.0
  O  O10  1  0.66666700  0.33333300  0.36127200  1.0
  O  O11  1  0.33333300  0.66666700  0.36127200  1.0
  O  O12  1  0.33333300  0.66666700  0.86127200  1.0
  O  O13  1  0.66666700  0.33333300  0.86127200  1.0
  O  O14  1  0.50447900  0.00000000  0.51084300  1.0
  O  O15  1  0.49552100  0.49552100  0.51084300  1.0
  O  O16  1  0.00000000  0.50447900  0.51084300  1.0
  O  O17  1  0.49552100  0.00000000  0.01084300  1.0
  O  O18  1  0.50447900  0.50447900  0.01084300  1.0
  O  O19  1  0.00000000  0.49552100  0.01084300  1.0
  O  O20  1  0.30602000  0.00000000  0.21789300  1.0
  O  O21  1  0.69398000  0.69398000  0.21789300  1.0
  O  O22  1  0.00000000  0.30602000  0.21789300  1.0
  O  O23  1  0.69398000  0.00000000  0.71789300  1.0
  O  O24  1  0.30602000  0.30602000  0.71789300  1.0
  O  O25  1  0.00000000  0.69398000  0.71789300  1.0
  O  O26  1  0.00000000  0.00000000  0.33275500  1.0
  O  O27  1  0.00000000  0.00000000  0.83275500  1.0