The material described by U3Al2Ge3 crystallizes in the tetragonal I4cm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to three equivalent Al(1), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second U site, U(2) is bonded in a 10-coordinate geometry to four equivalent Al(1), two equivalent Ge(2), and four equivalent Ge(1) atoms. Al(1) is bonded in a 3-coordinate geometry to two equivalent U(2), three equivalent U(1), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent U(2), three equivalent U(1), and three equivalent Al(1) atoms. In the second Ge site, Ge(2) is bonded to two equivalent U(2) and four equivalent U(1) atoms to form corner-sharing GeU6 octahedra. The corner-sharing octahedral tilt angles range from 0-42°. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Al2Ge3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.794
_cell_length_b   7.794
_cell_length_c   7.794
_cell_angle_alpha   120.561
_cell_angle_beta   120.561
_cell_angle_gamma   89.031
_symmetry_Int_Tables_number   1
_cell_volume   331.906
_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
  U  U0  1  0.364  0.177  0.500  1.0
  U  U1  1  0.677  0.864  0.500  1.0
  U  U2  1  0.177  0.677  0.813  1.0
  U  U3  1  0.864  0.364  0.187  1.0
  U  U4  1  0.747  0.747  0.000  1.0
  U  U5  1  0.247  0.247  0.000  1.0
  Al  Al6  1  0.694  0.468  0.500  1.0
  Al  Al7  1  0.968  0.194  0.500  1.0
  Al  Al8  1  0.468  0.968  0.774  1.0
  Al  Al9  1  0.194  0.694  0.226  1.0
  Ge  Ge10  1  0.359  0.555  0.500  1.0
  Ge  Ge11  1  0.055  0.859  0.500  1.0
  Ge  Ge12  1  0.555  0.055  0.196  1.0
  Ge  Ge13  1  0.859  0.359  0.804  1.0
  Ge  Ge14  1  0.995  0.995  0.000  1.0
  Ge  Ge15  1  0.495  0.495  0.000  1.0
[/CIF]
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The material described by U3Al2Ge3 crystallizes in the tetragonal I4cm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to three equivalent Al(1), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second U site, U(2) is bonded in a 10-coordinate geometry to four equivalent Al(1), two equivalent Ge(2), and four equivalent Ge(1) atoms. Al(1) is bonded in a 3-coordinate geometry to two equivalent U(2), three equivalent U(1), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent U(2), three equivalent U(1), and three equivalent Al(1) atoms. In the second Ge site, Ge(2) is bonded to two equivalent U(2) and four equivalent U(1) atoms to form corner-sharing GeU6 octahedra. The corner-sharing octahedral tilt angles range from 0-42°. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Al2Ge3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.794
_cell_length_b   7.794
_cell_length_c   7.794
_cell_angle_alpha   120.561
_cell_angle_beta   120.561
_cell_angle_gamma   89.031
_symmetry_Int_Tables_number   1
_cell_volume   331.906
_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
  U  U0  1  0.364  0.177  0.500  1.0
  U  U1  1  0.677  0.864  0.500  1.0
  U  U2  1  0.177  0.677  0.813  1.0
  U  U3  1  0.864  0.364  0.187  1.0
  U  U4  1  0.747  0.747  0.000  1.0
  U  U5  1  0.247  0.247  0.000  1.0
  Al  Al6  1  0.694  0.468  0.500  1.0
  Al  Al7  1  0.968  0.194  0.500  1.0
  Al  Al8  1  0.468  0.968  0.774  1.0
  Al  Al9  1  0.194  0.694  0.226  1.0
  Ge  Ge10  1  0.359  0.555  0.500  1.0
  Ge  Ge11  1  0.055  0.859  0.500  1.0
  Ge  Ge12  1  0.555  0.055  0.196  1.0
  Ge  Ge13  1  0.859  0.359  0.804  1.0
  Ge  Ge14  1  0.995  0.995  0.000  1.0
  Ge  Ge15  1  0.495  0.495  0.000  1.0
[/CIF]
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