data_LaCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.81
_cell_length_b   4.81
_cell_length_c   4.81
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaCr
_chemical_formula_sum   'La2 Cr2'
_cell_volume   78.81
_cell_formula_units_Z   2
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
  La  La2  1  0.1  0.1  0.1  1.0
  La  La3  1  0.4  0.4  0.4  1.0
  Cr  Cr0  1  0.0  0.0  0.0  1.0
  Cr  Cr1  1  0.7  0.7  0.7  1.0

data_LaCr
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.81
_cell_length_b   4.81
_cell_length_c   11.79
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LaCr
_chemical_formula_sum   'La6 Cr6'
_cell_volume   236.43
_cell_formula_units_Z   6
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
  La  La0  3  0.0  0.0  0.6  1.0
  La  La1  3  0.0  0.0  0.9  1.0
  Cr  Cr2  3  0.0  0.0  0.0  1.0
  Cr  Cr3  3  0.0  0.0  0.3  1.0

La La Cr Cr
La La Cr Cr 0 2 o o o 0 1 o o - 0 1 o - o 0 1 - o o 0 3 o - - 0 3 - o - 0 3 - - o 1 2 o o + 1 2 o + o 1 2 + o o 1 3 - o o 1 3 o - o 1 3 o o - 2 3 o - - 2 3 - o - 2 3 - - o 
LaCr crystallizes in the trigonal R3m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a single-bond geometry to one Cr(1) and three equivalent Cr(2) atoms. The La(1)-Cr(1) bond length is 1.23 Å. All La(1)-Cr(2) bond lengths are 2.90 Å. In the second La site, La(2) is bonded in a 3-coordinate geometry to four equivalent Cr(2) atoms. There are three shorter (2.81 Å) and one longer (3.52 Å) La(2)-Cr(2) bond length. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a single-bond geometry to one La(1) and three equivalent Cr(2) atoms. All Cr(1)-Cr(2) bond lengths are 2.81 Å. In the second Cr site, Cr(2) is bonded in a 10-coordinate geometry to three equivalent La(1), four equivalent La(2), and three equivalent Cr(1) atoms.