The crystal structure described by PaSi3 crystallizes in the hexagonal P6_3/mmc space group. Pa(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted face and corner-sharing PaSi12 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to four equivalent Pa(1) and six equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_PaSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.894
_cell_length_b   5.894
_cell_length_c   4.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   134.641
_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
  Pa  Pa0  1  0.667  0.333  0.250  1.0
  Pa  Pa1  1  0.333  0.667  0.750  1.0
  Si  Si2  1  0.857  0.143  0.750  1.0
  Si  Si3  1  0.285  0.143  0.750  1.0
  Si  Si4  1  0.857  0.715  0.750  1.0
  Si  Si5  1  0.143  0.857  0.250  1.0
  Si  Si6  1  0.715  0.857  0.250  1.0
  Si  Si7  1  0.143  0.285  0.250  1.0
[/CIF]
.
The crystal structure described by PaSi3 crystallizes in the hexagonal P6_3/mmc space group. Pa(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of distorted face and corner-sharing PaSi12 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to four equivalent Pa(1) and six equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_PaSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.894
_cell_length_b   5.894
_cell_length_c   4.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   134.641
_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
  Pa  Pa0  1  0.667  0.333  0.250  1.0
  Pa  Pa1  1  0.333  0.667  0.750  1.0
  Si  Si2  1  0.857  0.143  0.750  1.0
  Si  Si3  1  0.285  0.143  0.750  1.0
  Si  Si4  1  0.857  0.715  0.750  1.0
  Si  Si5  1  0.143  0.857  0.250  1.0
  Si  Si6  1  0.715  0.857  0.250  1.0
  Si  Si7  1  0.143  0.285  0.250  1.0
[/CIF]
.