The crystal structure described by Mn(CrSe2)2 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form CrSe6 octahedra that share corners with six equivalent Mn(1)Se6 octahedra, edges with six equivalent Cr(1)Se6 octahedra, and  a faceface with one Mn(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. Mn(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form MnSe6 octahedra that share corners with twelve equivalent Cr(1)Se6 octahedra, edges with two equivalent Mn(1)Se6 octahedra, and faces with two equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded to three equivalent Cr(1) and two equivalent Mn(1) atoms to form a mixture of distorted corner and edge-sharing SeMn2Cr3 trigonal bipyramids. In the second Se site, Se(1) is bonded in a rectangular see-saw-like geometry to three equivalent Cr(1) and one Mn(1) atom. is represented by the CIF card [CIF]
data_Mn(CrSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.705
_cell_length_b   6.414
_cell_length_c   7.124
_cell_angle_alpha   116.683
_cell_angle_beta   105.073
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   144.723
_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  Mn0  1  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.258  0.270  0.517  1.0
  Cr  Cr2  1  0.742  0.730  0.483  1.0
  Se  Se3  1  0.131  0.458  0.262  1.0
  Se  Se4  1  0.869  0.542  0.738  1.0
  Se  Se5  1  0.363  0.025  0.726  1.0
  Se  Se6  1  0.637  0.975  0.274  1.0
[/CIF]
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The crystal structure described by Mn(CrSe2)2 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded to three equivalent Se(1) and three equivalent Se(2) atoms to form CrSe6 octahedra that share corners with six equivalent Mn(1)Se6 octahedra, edges with six equivalent Cr(1)Se6 octahedra, and  a faceface with one Mn(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. Mn(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form MnSe6 octahedra that share corners with twelve equivalent Cr(1)Se6 octahedra, edges with two equivalent Mn(1)Se6 octahedra, and faces with two equivalent Cr(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded to three equivalent Cr(1) and two equivalent Mn(1) atoms to form a mixture of distorted corner and edge-sharing SeMn2Cr3 trigonal bipyramids. In the second Se site, Se(1) is bonded in a rectangular see-saw-like geometry to three equivalent Cr(1) and one Mn(1) atom. is represented by the CIF card [CIF]
data_Mn(CrSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.705
_cell_length_b   6.414
_cell_length_c   7.124
_cell_angle_alpha   116.683
_cell_angle_beta   105.073
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   144.723
_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  Mn0  1  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.258  0.270  0.517  1.0
  Cr  Cr2  1  0.742  0.730  0.483  1.0
  Se  Se3  1  0.131  0.458  0.262  1.0
  Se  Se4  1  0.869  0.542  0.738  1.0
  Se  Se5  1  0.363  0.025  0.726  1.0
  Se  Se6  1  0.637  0.975  0.274  1.0
[/CIF]
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