data_[Sr2Si14N20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Si  1.9000  1.1000  0.5400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Pc]
_cell_length_a [6.8415]
_cell_length_b [6.7165]
_cell_length_c [9.6168]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.1598]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [7]
_chemical_formula_structural [SrSi7N10]
_chemical_formula_sum '[Sr2 Si14 N20]'
_cell_volume [424.4379]
_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  0.9567  0.0569  0.6693  1
  Si  Si1  2  0.1089  0.3944  0.0736  1
  Si  Si2  2  0.2960  0.3805  0.3839  1
  Si  Si3  2  0.3517  0.0268  0.0155  1
  Si  Si4  2  0.4844  0.3704  0.6877  1
  Si  Si5  2  0.5396  0.0262  0.3279  1
  Si  Si6  2  0.6670  0.3644  0.9934  1
  Si  Si7  2  0.8502  0.3758  0.3097  1
  N  N8  2  0.0794  0.4203  0.4399  1
  N  N9  2  0.1501  0.1639  0.0183  1
  N  N10  2  0.2862  0.4997  0.2245  1
  N  N11  2  0.3164  0.1288  0.3622  1
  N  N12  2  0.4434  0.1173  0.6718  1
  N  N13  2  0.4996  0.4615  0.5237  1
  N  N14  2  0.5685  0.1305  0.9784  1
  N  N15  2  0.7060  0.4135  0.8246  1
  N  N16  2  0.7499  0.1536  0.3312  1
  N  N17  2  0.8884  0.3841  0.1338  1
]