data_RbLaCe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.21
_cell_length_b   6.21
_cell_length_c   6.21
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbLaCe2
_chemical_formula_sum   'Rb1 La1 Ce2'
_cell_volume   169.34
_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
  Rb  Rb3  1  0.0  0.0  0.0  1.0
  La  La2  1  0.39  0.39  0.39  1.0
  Ce  Ce0  1  0.59  0.59  0.59  1.0
  Ce  Ce1  1  0.2  0.2  0.2  1.0

data_RbLaCe2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.21
_cell_length_b   6.21
_cell_length_c   15.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbLaCe2
_chemical_formula_sum   'Rb3 La3 Ce6'
_cell_volume   508.02
_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
  Rb  Rb0  3  0.0  0.0  0.0  1.0
  La  La1  3  0.0  0.0  0.61  1.0
  Ce  Ce2  3  0.0  0.0  0.41  1.0
  Ce  Ce3  3  0.0  0.0  0.8  1.0

Rb La Ce Ce
RbCe2La crystallizes in the trigonal R3m space group. Rb(1) is bonded in a 1-coordinate geometry to one Ce(2), three equivalent Ce(1), and three equivalent La(1) atoms. The Rb(1)-Ce(2) bond length is 2.97 Å. All Rb(1)-Ce(1) bond lengths are 3.79 Å. All Rb(1)-La(1) bond lengths are 3.69 Å. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 4-coordinate geometry to three equivalent Rb(1) and one La(1) atom. The Ce(1)-La(1) bond length is 2.97 Å. In the second Ce site, Ce(2) is bonded in a distorted linear geometry to one Rb(1) and one La(1) atom. The Ce(2)-La(1) bond length is 2.97 Å. La(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1), one Ce(1), and one Ce(2) atom.