data_ZnSi4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   95.58
_cell_angle_beta   95.58
_cell_angle_gamma   143.65
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnSi4
_chemical_formula_sum   'Zn1 Si4'
_cell_volume   78.12
_cell_formula_units_Z   1
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
  Zn  Zn4  1  0.0  0.0  0.0  1.0
  Si  Si0  1  0.51  0.04  0.0  1.0
  Si  Si1  1  0.04  0.45  0.0  1.0
  Si  Si2  1  0.97  0.44  0.61  1.0
  Si  Si3  1  0.44  0.03  0.61  1.0

data_ZnSi4
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.23
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   84.42
_cell_angle_beta   71.82
_cell_angle_gamma   71.82
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnSi4
_chemical_formula_sum   'Zn1 Si4'
_cell_volume   78.12
_cell_formula_units_Z   1
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
  Zn  Zn0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.03  0.41  0.39  1.0
  Si  Si2  1  0.04  0.47  -0.0  1.0
  Si  Si3  1  0.44  0.53  0.39  1.0
  Si  Si4  1  0.45  0.59  -0.0  1.0

Zn Si Si Si Si