data_RbNpTi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.22
_cell_length_b   5.22
_cell_length_c   5.22
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbNpTi2
_chemical_formula_sum   'Rb1 Np1 Ti2'
_cell_volume   100.34
_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  Rb1  1  0.0  0.0  0.0  1.0
  Np  Np0  1  0.69  0.69  0.69  1.0
  Ti  Ti2  1  0.84  0.84  0.84  1.0
  Ti  Ti3  1  0.53  0.53  0.53  1.0

data_RbNpTi2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.22
_cell_length_b   5.22
_cell_length_c   12.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbNpTi2
_chemical_formula_sum   'Rb3 Np3 Ti6'
_cell_volume   301.02
_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
  Np  Np1  3  0.0  0.0  0.31  1.0
  Ti  Ti2  3  0.0  0.0  0.16  1.0
  Ti  Ti3  3  0.0  0.0  0.47  1.0

Rb Np Ti Ti
RbNpTi2 crystallizes in the trigonal R3m space group. Rb(1) is bonded in a distorted single-bond geometry to three equivalent Np(1) and one Ti(1) atom. All Rb(1)-Np(1) bond lengths are 3.02 Å. The Rb(1)-Ti(1) bond length is 1.99 Å. Np(1) is bonded to three equivalent Rb(1), one Ti(1), and one Ti(2) atom to form distorted corner-sharing NpRb3Ti2 trigonal bipyramids. The Np(1)-Ti(1) bond length is 1.99 Å. The Np(1)-Ti(2) bond length is 1.99 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a linear geometry to one Rb(1) and one Np(1) atom. In the second Ti site, Ti(2) is bonded in a single-bond geometry to one Np(1) atom.