The compound described by PrAs2 crystallizes in the monoclinic P2_1/c space group. Pr(1) is bonded in a 9-coordinate geometry to four equivalent As(1) and five equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded to five equivalent Pr(1) and one As(1) atom to form a mixture of distorted edge and corner-sharing AsPr5As pentagonal pyramids. In the second As site, As(1) is bonded in a 6-coordinate geometry to four equivalent Pr(1), one As(1), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.937
_cell_length_b   4.182
_cell_length_c   10.629
_cell_angle_alpha   73.557
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   295.725
_cell_formula_units_Z   4
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  0.312  0.088  0.141  1.0
  Pr  Pr1  1  0.812  0.912  0.359  1.0
  Pr  Pr2  1  0.688  0.912  0.859  1.0
  Pr  Pr3  1  0.188  0.088  0.641  1.0
  As  As4  1  0.377  0.720  0.452  1.0
  As  As5  1  0.877  0.280  0.048  1.0
  As  As6  1  0.623  0.280  0.548  1.0
  As  As7  1  0.123  0.720  0.952  1.0
  As  As8  1  0.646  0.536  0.169  1.0
  As  As9  1  0.146  0.464  0.331  1.0
  As  As10  1  0.354  0.464  0.831  1.0
  As  As11  1  0.854  0.536  0.669  1.0
[/CIF]
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The compound described by PrAs2 crystallizes in the monoclinic P2_1/c space group. Pr(1) is bonded in a 9-coordinate geometry to four equivalent As(1) and five equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded to five equivalent Pr(1) and one As(1) atom to form a mixture of distorted edge and corner-sharing AsPr5As pentagonal pyramids. In the second As site, As(1) is bonded in a 6-coordinate geometry to four equivalent Pr(1), one As(1), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.937
_cell_length_b   4.182
_cell_length_c   10.629
_cell_angle_alpha   73.557
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   295.725
_cell_formula_units_Z   4
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  0.312  0.088  0.141  1.0
  Pr  Pr1  1  0.812  0.912  0.359  1.0
  Pr  Pr2  1  0.688  0.912  0.859  1.0
  Pr  Pr3  1  0.188  0.088  0.641  1.0
  As  As4  1  0.377  0.720  0.452  1.0
  As  As5  1  0.877  0.280  0.048  1.0
  As  As6  1  0.623  0.280  0.548  1.0
  As  As7  1  0.123  0.720  0.952  1.0
  As  As8  1  0.646  0.536  0.169  1.0
  As  As9  1  0.146  0.464  0.331  1.0
  As  As10  1  0.354  0.464  0.831  1.0
  As  As11  1  0.854  0.536  0.669  1.0
[/CIF]
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