data_K3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.07
_cell_length_b   7.07
_cell_length_c   7.07
_cell_angle_alpha   131.7
_cell_angle_beta   131.7
_cell_angle_gamma   70.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K3Ag
_chemical_formula_sum   'K3 Ag1'
_cell_volume   192.72
_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
  K  K1  1  0.0  0.89  0.88  1.0
  K  K2  1  0.0  0.0  0.0  1.0
  K  K3  1  0.89  0.0  0.88  1.0
  Ag  Ag0  1  0.0  0.0  0.76  1.0

data_K3Ag
_symmetry_space_group_name_H-M   Cm
_cell_length_a   8.18
_cell_length_b   8.18
_cell_length_c   7.07
_cell_angle_alpha   90.0
_cell_angle_beta   125.35
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K3Ag
_chemical_formula_sum   'K6 Ag2'
_cell_volume   385.44
_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
  K  K0  4  0.05  0.05  0.99  1.0
  K  K1  2  0.0  0.0  0.0  1.0
  Ag  Ag2  2  0.0  0.0  0.76  1.0

K K K Ag
K K K Ag 0 1 o + + 0 3 o + o 1 2 - o - 1 3 o o - 2 3 + o o 