data_Mn2CrNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.47
_cell_length_b   2.47
_cell_length_c   7.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2CrNi
_chemical_formula_sum   'Mn2 Cr1 Ni1'
_cell_volume   43.89
_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
  Mn  Mn1  1  0.23  0.23  0.07  1.0
  Mn  Mn2  1  0.0  0.0  0.74  1.0
  Cr  Cr0  1  0.0  0.0  0.42  1.0
  Ni  Ni3  1  0.23  0.23  0.57  1.0

data_Mn2CrNi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.49
_cell_length_b   3.49
_cell_length_c   7.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mn2CrNi
_chemical_formula_sum   'Mn4 Cr2 Ni2'
_cell_volume   87.78
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Mn  Mn0  2  0.0  0.0  0.74  1.0
  Mn  Mn1  2  0.23  0.0  0.07  1.0
  Cr  Cr2  2  0.0  0.0  0.42  1.0
  Ni  Ni3  2  0.23  0.0  0.57  1.0

Mn Mn Cr Ni
CrMn2Ni crystallizes in the monoclinic Cm space group. Cr(1) is bonded in a single-bond geometry to one Mn(1) and one Ni(1) atom. The Cr(1)-Mn(1) bond length is 2.62 Å. The Cr(1)-Ni(1) bond length is 1.36 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to one Cr(1), one Mn(2), and four equivalent Mn(1) atoms. The Mn(1)-Mn(2) bond length is 2.56 Å. All Mn(1)-Mn(1) bond lengths are 2.47 Å. In the second Mn site, Mn(2) is bonded in a single-bond geometry to one Mn(1) and one Ni(1) atom. The Mn(2)-Ni(1) bond length is 1.45 Å. Ni(1) is bonded in a water-like geometry to one Cr(1) and one Mn(2) atom.