data_NdMn2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.77
_cell_length_b   4.77
_cell_length_c   4.77
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NdMn2Sn
_chemical_formula_sum   'Nd1 Mn2 Sn1'
_cell_volume   76.84
_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
  Nd  Nd2  1  0.37  0.37  0.37  1.0
  Mn  Mn0  1  0.69  0.69  0.69  1.0
  Mn  Mn1  1  0.06  0.06  0.06  1.0
  Sn  Sn3  1  0.0  0.0  0.0  1.0

data_NdMn2Sn
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.77
_cell_length_b   4.77
_cell_length_c   11.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NdMn2Sn
_chemical_formula_sum   'Nd3 Mn6 Sn3'
_cell_volume   230.53
_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
  Nd  Nd0  3  0.0  0.0  0.63  1.0
  Mn  Mn1  3  0.0  0.0  0.31  1.0
  Mn  Mn2  3  0.0  0.0  0.94  1.0
  Sn  Sn3  3  0.0  0.0  -0.0  1.0

Nd Mn Mn Sn
NdMn2Sn crystallizes in the trigonal R3m space group. Nd(1) is bonded in a 11-coordinate geometry to four equivalent Mn(1), four equivalent Mn(2), and three equivalent Sn(1) atoms. There are three shorter (2.77 Å) and one longer (3.66 Å) Nd(1)-Mn(1) bond length. There are three shorter (2.77 Å) and one longer (3.66 Å) Nd(1)-Mn(2) bond length. All Nd(1)-Sn(1) bond lengths are 2.80 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 7-coordinate geometry to four equivalent Nd(1) and three equivalent Sn(1) atoms. All Mn(1)-Sn(1) bond lengths are 2.77 Å. In the second Mn site, Mn(2) is bonded in a single-bond geometry to four equivalent Nd(1) and one Sn(1) atom. The Mn(2)-Sn(1) bond length is 0.72 Å. Sn(1) is bonded in a single-bond geometry to three equivalent Nd(1), one Mn(2), and three equivalent Mn(1) atoms.