The structure described by UMnC2 crystallizes in the orthorhombic Pnma space group. U(1) is bonded in a 5-coordinate geometry to two equivalent C(1) and three equivalent C(2) atoms. Mn(1) is bonded to one C(2) and four equivalent C(1) atoms to form a mixture of distorted corner and edge-sharing MnC5 trigonal bipyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent U(1) and four equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing CU2Mn4 octahedra. The corner-sharing octahedral tilt angles are 38°. In the second C site, C(2) is bonded in a 6-coordinate geometry to three equivalent U(1), one Mn(1), and two equivalent C(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_UMnC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.223
_cell_length_b   2.774
_cell_length_c   12.255
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   177.557
_cell_formula_units_Z   4
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
  U  U0  1  0.379  0.250  0.088  1.0
  U  U1  1  0.879  0.250  0.412  1.0
  U  U2  1  0.621  0.750  0.912  1.0
  U  U3  1  0.121  0.750  0.588  1.0
  Mn  Mn4  1  0.103  0.250  0.804  1.0
  Mn  Mn5  1  0.603  0.250  0.696  1.0
  Mn  Mn6  1  0.897  0.750  0.196  1.0
  Mn  Mn7  1  0.397  0.750  0.304  1.0
  C  C8  1  0.148  0.250  0.253  1.0
  C  C9  1  0.648  0.250  0.247  1.0
  C  C10  1  0.852  0.750  0.747  1.0
  C  C11  1  0.352  0.750  0.753  1.0
  C  C12  1  0.996  0.250  0.969  1.0
  C  C13  1  0.496  0.250  0.531  1.0
  C  C14  1  0.004  0.750  0.031  1.0
  C  C15  1  0.504  0.750  0.469  1.0
[/CIF]
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The structure described by UMnC2 crystallizes in the orthorhombic Pnma space group. U(1) is bonded in a 5-coordinate geometry to two equivalent C(1) and three equivalent C(2) atoms. Mn(1) is bonded to one C(2) and four equivalent C(1) atoms to form a mixture of distorted corner and edge-sharing MnC5 trigonal bipyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent U(1) and four equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing CU2Mn4 octahedra. The corner-sharing octahedral tilt angles are 38°. In the second C site, C(2) is bonded in a 6-coordinate geometry to three equivalent U(1), one Mn(1), and two equivalent C(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_UMnC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.223
_cell_length_b   2.774
_cell_length_c   12.255
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   177.557
_cell_formula_units_Z   4
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
  U  U0  1  0.379  0.250  0.088  1.0
  U  U1  1  0.879  0.250  0.412  1.0
  U  U2  1  0.621  0.750  0.912  1.0
  U  U3  1  0.121  0.750  0.588  1.0
  Mn  Mn4  1  0.103  0.250  0.804  1.0
  Mn  Mn5  1  0.603  0.250  0.696  1.0
  Mn  Mn6  1  0.897  0.750  0.196  1.0
  Mn  Mn7  1  0.397  0.750  0.304  1.0
  C  C8  1  0.148  0.250  0.253  1.0
  C  C9  1  0.648  0.250  0.247  1.0
  C  C10  1  0.852  0.750  0.747  1.0
  C  C11  1  0.352  0.750  0.753  1.0
  C  C12  1  0.996  0.250  0.969  1.0
  C  C13  1  0.496  0.250  0.531  1.0
  C  C14  1  0.004  0.750  0.031  1.0
  C  C15  1  0.504  0.750  0.469  1.0
[/CIF]
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