The structure described by MgU crystallizes in the orthorhombic Pmma space group. Mg(1) is bonded to four equivalent Mg(1) and eight equivalent U(1) atoms to form distorted MgMg4U8 cuboctahedra that share corners with eight equivalent U(1)Mg8U4 cuboctahedra, corners with ten equivalent Mg(1)Mg4U8 cuboctahedra, edges with six equivalent Mg(1)Mg4U8 cuboctahedra, edges with twelve equivalent U(1)Mg8U4 cuboctahedra, faces with eight equivalent U(1)Mg8U4 cuboctahedra, and faces with twelve equivalent Mg(1)Mg4U8 cuboctahedra. U(1) is bonded to eight equivalent Mg(1) and four equivalent U(1) atoms to form distorted UMg8U4 cuboctahedra that share corners with eight equivalent Mg(1)Mg4U8 cuboctahedra, corners with ten equivalent U(1)Mg8U4 cuboctahedra, edges with six equivalent U(1)Mg8U4 cuboctahedra, edges with twelve equivalent Mg(1)Mg4U8 cuboctahedra, faces with eight equivalent Mg(1)Mg4U8 cuboctahedra, and faces with twelve equivalent U(1)Mg8U4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.800
_cell_length_b   4.798
_cell_length_c   6.198
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   83.272
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.000  0.250  0.118  1.0
  Mg  Mg1  1  0.000  0.750  0.882  1.0
  U  U2  1  0.500  0.750  0.409  1.0
  U  U3  1  0.500  0.250  0.591  1.0
[/CIF]
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The structure described by MgU crystallizes in the orthorhombic Pmma space group. Mg(1) is bonded to four equivalent Mg(1) and eight equivalent U(1) atoms to form distorted MgMg4U8 cuboctahedra that share corners with eight equivalent U(1)Mg8U4 cuboctahedra, corners with ten equivalent Mg(1)Mg4U8 cuboctahedra, edges with six equivalent Mg(1)Mg4U8 cuboctahedra, edges with twelve equivalent U(1)Mg8U4 cuboctahedra, faces with eight equivalent U(1)Mg8U4 cuboctahedra, and faces with twelve equivalent Mg(1)Mg4U8 cuboctahedra. U(1) is bonded to eight equivalent Mg(1) and four equivalent U(1) atoms to form distorted UMg8U4 cuboctahedra that share corners with eight equivalent Mg(1)Mg4U8 cuboctahedra, corners with ten equivalent U(1)Mg8U4 cuboctahedra, edges with six equivalent U(1)Mg8U4 cuboctahedra, edges with twelve equivalent Mg(1)Mg4U8 cuboctahedra, faces with eight equivalent Mg(1)Mg4U8 cuboctahedra, and faces with twelve equivalent U(1)Mg8U4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.800
_cell_length_b   4.798
_cell_length_c   6.198
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   83.272
_cell_formula_units_Z   2
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
  Mg  Mg0  1  0.000  0.250  0.118  1.0
  Mg  Mg1  1  0.000  0.750  0.882  1.0
  U  U2  1  0.500  0.750  0.409  1.0
  U  U3  1  0.500  0.250  0.591  1.0
[/CIF]
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