The structure described by UMn3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. U(1) is bonded to four equivalent Mn(1) and eight equivalent Mn(2) atoms to form UMn12 cuboctahedra that share corners with four equivalent U(1)Mn12 cuboctahedra, corners with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with eight equivalent U(1)Mn12 cuboctahedra, edges with sixteen equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent U(1)Mn12 cuboctahedra, faces with six equivalent Mn(1)U4Mn8 cuboctahedra, and faces with eight equivalent Mn(2)U4Mn8 cuboctahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four equivalent U(1) and eight equivalent Mn(2) atoms to form MnU4Mn8 cuboctahedra that share corners with four equivalent Mn(1)U4Mn8 cuboctahedra, corners with eight equivalent U(1)Mn12 cuboctahedra, edges with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with sixteen equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent Mn(1)U4Mn8 cuboctahedra, faces with six equivalent U(1)Mn12 cuboctahedra, and faces with eight equivalent Mn(2)U4Mn8 cuboctahedra. In the second Mn site, Mn(2) is bonded to four equivalent U(1), four equivalent Mn(1), and four equivalent Mn(2) atoms to form MnU4Mn8 cuboctahedra that share corners with twelve equivalent Mn(2)U4Mn8 cuboctahedra, edges with eight equivalent U(1)Mn12 cuboctahedra, edges with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with eight equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent U(1)Mn12 cuboctahedra, faces with four equivalent Mn(1)U4Mn8 cuboctahedra, and faces with ten equivalent Mn(2)U4Mn8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_UMn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.624
_cell_length_b   4.624
_cell_length_c   4.624
_cell_angle_alpha   131.481
_cell_angle_beta   131.481
_cell_angle_gamma   71.051
_symmetry_Int_Tables_number   1
_cell_volume   54.320
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.250  0.750  0.500  1.0
  Mn  Mn3  1  0.750  0.250  0.500  1.0
[/CIF]
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The structure described by UMn3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. U(1) is bonded to four equivalent Mn(1) and eight equivalent Mn(2) atoms to form UMn12 cuboctahedra that share corners with four equivalent U(1)Mn12 cuboctahedra, corners with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with eight equivalent U(1)Mn12 cuboctahedra, edges with sixteen equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent U(1)Mn12 cuboctahedra, faces with six equivalent Mn(1)U4Mn8 cuboctahedra, and faces with eight equivalent Mn(2)U4Mn8 cuboctahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four equivalent U(1) and eight equivalent Mn(2) atoms to form MnU4Mn8 cuboctahedra that share corners with four equivalent Mn(1)U4Mn8 cuboctahedra, corners with eight equivalent U(1)Mn12 cuboctahedra, edges with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with sixteen equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent Mn(1)U4Mn8 cuboctahedra, faces with six equivalent U(1)Mn12 cuboctahedra, and faces with eight equivalent Mn(2)U4Mn8 cuboctahedra. In the second Mn site, Mn(2) is bonded to four equivalent U(1), four equivalent Mn(1), and four equivalent Mn(2) atoms to form MnU4Mn8 cuboctahedra that share corners with twelve equivalent Mn(2)U4Mn8 cuboctahedra, edges with eight equivalent U(1)Mn12 cuboctahedra, edges with eight equivalent Mn(1)U4Mn8 cuboctahedra, edges with eight equivalent Mn(2)U4Mn8 cuboctahedra, faces with four equivalent U(1)Mn12 cuboctahedra, faces with four equivalent Mn(1)U4Mn8 cuboctahedra, and faces with ten equivalent Mn(2)U4Mn8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_UMn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.624
_cell_length_b   4.624
_cell_length_c   4.624
_cell_angle_alpha   131.481
_cell_angle_beta   131.481
_cell_angle_gamma   71.051
_symmetry_Int_Tables_number   1
_cell_volume   54.320
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.250  0.750  0.500  1.0
  Mn  Mn3  1  0.750  0.250  0.500  1.0
[/CIF]
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