data_NaYMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.84
_cell_length_b   8.66
_cell_length_c   3.34
_cell_angle_alpha   82.11
_cell_angle_beta   75.89
_cell_angle_gamma   22.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaYMg
_chemical_formula_sum   'Na1 Y1 Mg1'
_cell_volume   90.11
_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
  Na  Na1  1  0.99  0.68  0.15  1.0
  Y  Y2  1  0.99  0.68  0.78  1.0
  Mg  Mg0  1  0.99  0.68  0.76  1.0

data_NaYMg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.99
_cell_length_b   16.85
_cell_length_c   3.34
_cell_angle_alpha   90.0
_cell_angle_beta   126.59
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaYMg
_chemical_formula_sum   'Na2 Y2 Mg2'
_cell_volume   180.22
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Na  Na0  2  0.15  0.0  0.14  1.0
  Y  Y1  2  0.28  0.5  0.78  1.0
  Mg  Mg2  2  0.26  0.5  0.75  1.0

Na Y Mg