data_NaCo2Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.83
_cell_length_b   2.83
_cell_length_c   7.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCo2Ag
_chemical_formula_sum   'Na1 Co2 Ag1'
_cell_volume   64.2
_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  Na3  1  0.0  0.0  0.85  1.0
  Co  Co1  1  0.0  0.0  0.3  1.0
  Co  Co2  1  0.42  0.42  0.5  1.0
  Ag  Ag0  1  0.42  0.42  0.34  1.0

data_NaCo2Ag
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.01
_cell_length_b   4.01
_cell_length_c   7.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaCo2Ag
_chemical_formula_sum   'Na2 Co4 Ag2'
_cell_volume   128.4
_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  0.0  0.0  0.85  1.0
  Co  Co1  2  0.0  0.0  0.3  1.0
  Co  Co2  2  0.42  0.0  0.5  1.0
  Ag  Ag3  2  0.42  0.0  0.34  1.0

Na Co Co Ag
NaCo2Ag crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 9-coordinate geometry to four equivalent Na(1), one Co(1), and four equivalent Co(2) atoms. All Na(1)-Na(1) bond lengths are 2.83 Å. The Na(1)-Co(1) bond length is 3.56 Å. There are a spread of Na(1)-Co(2) bond distances ranging from 3.28-3.66 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one Na(1) and four equivalent Ag(1) atoms. There are a spread of Co(1)-Ag(1) bond distances ranging from 1.71-2.37 Å. In the second Co site, Co(2) is bonded in a single-bond geometry to four equivalent Na(1) and one Ag(1) atom. The Co(2)-Ag(1) bond length is 1.24 Å. Ag(1) is bonded in a 1-coordinate geometry to one Co(2) and four equivalent Co(1) atoms.