The material structure described by Pr2Co15Al2 crystallizes in the trigonal R-3m space group. Pr(1) is bonded in a 19-coordinate geometry to three equivalent Co(1), six equivalent Co(2), nine equivalent Co(3), and one Al(1) atom. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), four equivalent Co(2), four equivalent Co(3), and two equivalent Al(1) atoms. In the second Co site, Co(2) is bonded in a distorted q6 geometry to two equivalent Pr(1), two equivalent Co(1), two equivalent Co(2), four equivalent Co(3), and two equivalent Al(1) atoms. In the third Co site, Co(3) is bonded to three equivalent Pr(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and one Al(1) atom to form a mixture of distorted face, corner, and edge-sharing CoPr3AlCo8 cuboctahedra. Al(1) is bonded in a 14-coordinate geometry to one Pr(1), three equivalent Co(1), three equivalent Co(3), six equivalent Co(2), and one Al(1) atom. is represented by the CIF card [CIF]
data_Pr2Al2Co15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.373
_cell_length_b   6.373
_cell_length_c   6.373
_cell_angle_alpha   82.546
_cell_angle_beta   82.546
_cell_angle_gamma   82.546
_symmetry_Int_Tables_number   1
_cell_volume   252.791
_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
  Pr  Pr0  1  0.648  0.648  0.648  1.0
  Pr  Pr1  1  0.352  0.352  0.352  1.0
  Al  Al2  1  0.895  0.895  0.895  1.0
  Al  Al3  1  0.105  0.105  0.105  1.0
  Co  Co4  1  0.000  0.000  0.500  1.0
  Co  Co5  1  0.500  0.000  0.000  1.0
  Co  Co6  1  0.000  0.500  0.000  1.0
  Co  Co7  1  0.717  0.283  0.000  1.0
  Co  Co8  1  0.000  0.717  0.283  1.0
  Co  Co9  1  0.283  0.000  0.717  1.0
  Co  Co10  1  0.000  0.283  0.717  1.0
  Co  Co11  1  0.717  0.000  0.283  1.0
  Co  Co12  1  0.283  0.717  0.000  1.0
  Co  Co13  1  0.346  0.346  0.853  1.0
  Co  Co14  1  0.853  0.346  0.346  1.0
  Co  Co15  1  0.346  0.853  0.346  1.0
  Co  Co16  1  0.654  0.654  0.147  1.0
  Co  Co17  1  0.147  0.654  0.654  1.0
  Co  Co18  1  0.654  0.147  0.654  1.0
[/CIF]
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The material structure described by Pr2Co15Al2 crystallizes in the trigonal R-3m space group. Pr(1) is bonded in a 19-coordinate geometry to three equivalent Co(1), six equivalent Co(2), nine equivalent Co(3), and one Al(1) atom. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), four equivalent Co(2), four equivalent Co(3), and two equivalent Al(1) atoms. In the second Co site, Co(2) is bonded in a distorted q6 geometry to two equivalent Pr(1), two equivalent Co(1), two equivalent Co(2), four equivalent Co(3), and two equivalent Al(1) atoms. In the third Co site, Co(3) is bonded to three equivalent Pr(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and one Al(1) atom to form a mixture of distorted face, corner, and edge-sharing CoPr3AlCo8 cuboctahedra. Al(1) is bonded in a 14-coordinate geometry to one Pr(1), three equivalent Co(1), three equivalent Co(3), six equivalent Co(2), and one Al(1) atom. is represented by the CIF card [CIF]
data_Pr2Al2Co15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.373
_cell_length_b   6.373
_cell_length_c   6.373
_cell_angle_alpha   82.546
_cell_angle_beta   82.546
_cell_angle_gamma   82.546
_symmetry_Int_Tables_number   1
_cell_volume   252.791
_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
  Pr  Pr0  1  0.648  0.648  0.648  1.0
  Pr  Pr1  1  0.352  0.352  0.352  1.0
  Al  Al2  1  0.895  0.895  0.895  1.0
  Al  Al3  1  0.105  0.105  0.105  1.0
  Co  Co4  1  0.000  0.000  0.500  1.0
  Co  Co5  1  0.500  0.000  0.000  1.0
  Co  Co6  1  0.000  0.500  0.000  1.0
  Co  Co7  1  0.717  0.283  0.000  1.0
  Co  Co8  1  0.000  0.717  0.283  1.0
  Co  Co9  1  0.283  0.000  0.717  1.0
  Co  Co10  1  0.000  0.283  0.717  1.0
  Co  Co11  1  0.717  0.000  0.283  1.0
  Co  Co12  1  0.283  0.717  0.000  1.0
  Co  Co13  1  0.346  0.346  0.853  1.0
  Co  Co14  1  0.853  0.346  0.346  1.0
  Co  Co15  1  0.346  0.853  0.346  1.0
  Co  Co16  1  0.654  0.654  0.147  1.0
  Co  Co17  1  0.147  0.654  0.654  1.0
  Co  Co18  1  0.654  0.147  0.654  1.0
[/CIF]
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