data_KEu2Lu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.23
_cell_length_b   6.23
_cell_length_c   6.23
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KEu2Lu
_chemical_formula_sum   'K1 Eu2 Lu1'
_cell_volume   171.02
_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  K2  1  0.0  0.0  0.0  1.0
  Eu  Eu0  1  0.61  0.61  0.61  1.0
  Eu  Eu1  1  0.2  0.2  0.2  1.0
  Lu  Lu3  1  0.41  0.41  0.41  1.0

data_KEu2Lu
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.23
_cell_length_b   6.23
_cell_length_c   15.26
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KEu2Lu
_chemical_formula_sum   'K3 Eu6 Lu3'
_cell_volume   513.06
_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
  K  K0  3  0.0  0.0  0.0  1.0
  Eu  Eu1  3  0.0  0.0  0.39  1.0
  Eu  Eu2  3  0.0  0.0  0.8  1.0
  Lu  Lu3  3  0.0  0.0  0.59  1.0

K Eu Eu Lu
KLuEu2 crystallizes in the trigonal R3m space group. K(1) is bonded in a 10-coordinate geometry to three equivalent Lu(1), three equivalent Eu(1), and four equivalent Eu(2) atoms. All K(1)-Lu(1) bond lengths are 3.76 Å. All K(1)-Eu(1) bond lengths are 3.71 Å. There is one shorter (3.10 Å) and three longer (4.11 Å) K(1)-Eu(2) bond lengths. Lu(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Eu(1), and one Eu(2) atom. The Lu(1)-Eu(1) bond length is 3.10 Å. The Lu(1)-Eu(2) bond length is 3.10 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to three equivalent K(1) and one Lu(1) atom to form distorted corner-sharing EuK3Lu tetrahedra. In the second Eu site, Eu(2) is bonded in a distorted linear geometry to four equivalent K(1) and one Lu(1) atom.