data_CaMgNb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.81
_cell_length_b   5.39
_cell_length_c   5.67
_cell_angle_alpha   90.0
_cell_angle_beta   99.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaMgNb2
_chemical_formula_sum   'Ca1 Mg1 Nb2'
_cell_volume   84.89
_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
  Ca  Ca0  1  0.96  0.0  0.8  1.0
  Mg  Mg1  1  0.0  0.0  0.0  1.0
  Nb  Nb2  1  0.93  0.7  0.38  1.0
  Nb  Nb3  1  0.99  0.7  0.22  1.0

data_CaMgNb2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.81
_cell_length_b   5.39
_cell_length_c   5.67
_cell_angle_alpha   90.0
_cell_angle_beta   99.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaMgNb2
_chemical_formula_sum   'Ca1 Mg1 Nb2'
_cell_volume   84.89
_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
  Ca  Ca0  1  0.96  0.0  0.8  1.0
  Mg  Mg1  1  0.0  0.0  0.0  1.0
  Nb  Nb2  1  0.93  0.7  0.38  1.0
  Nb  Nb3  1  0.99  0.7  0.22  1.0

Ca Mg Nb Nb