data_K2RbTi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.69
_cell_length_b   6.69
_cell_length_c   6.69
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2RbTi
_chemical_formula_sum   'K2 Rb1 Ti1'
_cell_volume   211.3
_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  K0  1  0.36  0.36  0.36  1.0
  K  K1  1  0.09  0.09  0.09  1.0
  Rb  Rb2  1  0.73  0.73  0.73  1.0
  Ti  Ti3  1  0.0  0.0  0.0  1.0

data_K2RbTi
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.69
_cell_length_b   6.69
_cell_length_c   16.38
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   K2RbTi
_chemical_formula_sum   'K6 Rb3 Ti3'
_cell_volume   633.89
_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  0.27  1.0
  K  K1  3  0.0  0.0  0.64  1.0
  K  K2  3  0.0  0.0  0.91  1.0
  Ti  Ti3  3  0.0  0.0  0.0  1.0

K K Rb Ti
K K Rb Ti 0 1 o o o 0 1 o o + 0 1 o + o 0 1 + o o 0 3 o o + 0 3 o + o 0 3 + o o 0 2 - o o 0 2 o - o 0 2 o o - 1 3 o o o 1 2 o - - 1 2 - o - 1 2 - - o 2 3 o + + 2 3 + o + 2 3 + + o 2 3 + + + 
RbK2Ti crystallizes in the trigonal R3m space group. Rb(1) is bonded in a 10-coordinate geometry to three equivalent K(1), three equivalent K(2), and four equivalent Ti(1) atoms. All Rb(1)-K(1) bond lengths are 3.89 Å. All Rb(1)-K(2) bond lengths are 3.89 Å. There are three shorter (3.99 Å) and one longer (4.46 Å) Rb(1)-Ti(1) bond length. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to three equivalent Rb(1), four equivalent K(2), and three equivalent Ti(1) atoms. There are three shorter (3.99 Å) and one longer (4.46 Å) K(1)-K(2) bond length. All K(1)-Ti(1) bond lengths are 3.89 Å. In the second K site, K(2) is bonded in a single-bond geometry to three equivalent Rb(1), four equivalent K(1), and one Ti(1) atom. The K(2)-Ti(1) bond length is 1.49 Å. Ti(1) is bonded in a single-bond geometry to four equivalent Rb(1), one K(2), and three equivalent K(1) atoms.