data_NaCu2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.67
_cell_length_b   4.67
_cell_length_c   4.67
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCu2Cl
_chemical_formula_sum   'Na1 Cu2 Cl1'
_cell_volume   71.8
_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  0.0  1.0
  Cu  Cu1  1  0.95  0.95  0.95  1.0
  Cu  Cu2  1  0.3  0.3  0.3  1.0
  Cl  Cl0  1  0.65  0.65  0.65  1.0

data_NaCu2Cl
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.67
_cell_length_b   4.67
_cell_length_c   11.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaCu2Cl
_chemical_formula_sum   'Na3 Cu6 Cl3'
_cell_volume   215.39
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Cu  Cu1  3  0.0  0.0  0.05  1.0
  Cu  Cu2  3  0.0  0.0  0.7  1.0
  Cl  Cl3  3  0.0  0.0  0.35  1.0

Na Cu Cu Cl
Na Cu Cu Cl 0 1 - - - 0 2 o o - 0 2 o - o 0 2 - o o 0 3 o - - 0 3 - o - 0 3 - - o 1 2 + + o 1 2 + o + 1 2 o + + 1 3 + o o 1 3 o + o 1 3 o o + 2 3 - o o 2 3 o - o 2 3 o o - 
NaCu2Cl crystallizes in the trigonal R3m space group. Na(1) is bonded in a single-bond geometry to one Cu(1), four equivalent Cu(2), and three equivalent Cl(1) atoms. The Na(1)-Cu(1) bond length is 0.59 Å. There are three shorter (2.72 Å) and one longer (3.41 Å) Na(1)-Cu(2) bond length. All Na(1)-Cl(1) bond lengths are 2.70 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Na(1) and three equivalent Cl(1) atoms. All Cu(1)-Cl(1) bond lengths are 2.72 Å. In the second Cu site, Cu(2) is bonded in a 7-coordinate geometry to four equivalent Na(1) and three equivalent Cl(1) atoms. All Cu(2)-Cl(1) bond lengths are 2.70 Å. Cl(1) is bonded in a distorted q6 geometry to three equivalent Na(1), three equivalent Cu(1), and three equivalent Cu(2) atoms.