data_TmNpAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   5.02
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TmNpAl2
_chemical_formula_sum   'Tm1 Np1 Al2'
_cell_volume   89.5
_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
  Tm  Tm3  1  0.0  0.0  0.0  1.0
  Np  Np2  1  0.55  0.55  0.55  1.0
  Al  Al0  1  0.33  0.33  0.33  1.0
  Al  Al1  1  0.78  0.78  0.78  1.0

data_TmNpAl2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   12.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   TmNpAl2
_chemical_formula_sum   'Tm3 Np3 Al6'
_cell_volume   268.49
_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
  Tm  Tm0  3  0.0  0.0  0.0  1.0
  Np  Np1  3  0.0  0.0  0.45  1.0
  Al  Al2  3  0.0  0.0  0.22  1.0
  Al  Al3  3  0.0  0.0  0.67  1.0

Tm Np Al Al
Tm Np Al Al 0 3 - - - 0 3 - - o 0 3 o - - 0 3 - o - 0 1 - - o 0 1 - o - 0 1 o - - 0 2 - o o 0 2 o - o 0 2 o o - 1 2 o o 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 - 1 3 o o o 2 3 - o o 2 3 o - o 2 3 o o - 
NpTmAl2 is Heusler structured and crystallizes in the trigonal R3m space group. Np(1) is bonded in a 11-coordinate geometry to three equivalent Tm(1), four equivalent Al(1), and four equivalent Al(2) atoms. All Np(1)-Tm(1) bond lengths are 3.23 Å. There is one shorter (2.77 Å) and three longer (3.19 Å) Np(1)-Al(1) bond lengths. There is one shorter (2.77 Å) and three longer (3.19 Å) Np(1)-Al(2) bond lengths. Tm(1) is bonded in a 10-coordinate geometry to three equivalent Np(1), three equivalent Al(1), and four equivalent Al(2) atoms. All Tm(1)-Al(1) bond lengths are 2.90 Å. There is one shorter (2.77 Å) and three longer (3.19 Å) Tm(1)-Al(2) bond lengths. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 7-coordinate geometry to four equivalent Np(1) and three equivalent Tm(1) atoms. In the second Al site, Al(2) is bonded in a distorted body-centered cubic geometry to four equivalent Np(1) and four equivalent Tm(1) atoms.