The crystal structure described by AlP2 crystallizes in the orthorhombic Ibca space group. Al(1) is bonded in a 5-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted linear geometry to four equivalent Al(1) and two equivalent P(3) atoms. In the second P site, P(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Al(1) and two equivalent P(4) atoms. In the third P site, P(3) is bonded in a distorted L-shaped geometry to two equivalent Al(1) and two equivalent P(1) atoms. In the fourth P site, P(4) is bonded in a distorted water-like geometry to two equivalent Al(1) and two equivalent P(2) atoms. is represented by the CIF card [CIF]
data_AlP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.937
_cell_length_b   8.937
_cell_length_c   8.937
_cell_angle_alpha   132.265
_cell_angle_beta   122.312
_cell_angle_gamma   78.048
_symmetry_Int_Tables_number   1
_cell_volume   433.053
_cell_formula_units_Z   8
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
  Al  Al0  1  0.505  0.585  0.331  1.0
  Al  Al1  1  0.995  0.326  0.080  1.0
  Al  Al2  1  0.746  0.915  0.420  1.0
  Al  Al3  1  0.754  0.174  0.169  1.0
  Al  Al4  1  0.495  0.415  0.669  1.0
  Al  Al5  1  0.005  0.674  0.920  1.0
  Al  Al6  1  0.254  0.085  0.580  1.0
  Al  Al7  1  0.246  0.826  0.831  1.0
  P  P8  1  0.500  0.500  0.000  1.0
  P  P9  1  0.000  0.000  0.000  1.0
  P  P10  1  0.500  0.000  0.500  1.0
  P  P11  1  0.000  0.500  0.500  1.0
  P  P12  1  0.250  0.615  0.365  1.0
  P  P13  1  0.750  0.885  0.135  1.0
  P  P14  1  0.750  0.385  0.635  1.0
  P  P15  1  0.250  0.115  0.865  1.0
  P  P16  1  0.818  0.750  0.568  1.0
  P  P17  1  0.682  0.250  0.932  1.0
  P  P18  1  0.182  0.250  0.432  1.0
  P  P19  1  0.318  0.750  0.068  1.0
  P  P20  1  0.516  0.266  0.250  1.0
  P  P21  1  0.984  0.234  0.750  1.0
  P  P22  1  0.484  0.734  0.750  1.0
  P  P23  1  0.016  0.766  0.250  1.0
[/CIF]
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The crystal structure described by AlP2 crystallizes in the orthorhombic Ibca space group. Al(1) is bonded in a 5-coordinate geometry to one P(2), one P(3), one P(4), and two equivalent P(1) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted linear geometry to four equivalent Al(1) and two equivalent P(3) atoms. In the second P site, P(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Al(1) and two equivalent P(4) atoms. In the third P site, P(3) is bonded in a distorted L-shaped geometry to two equivalent Al(1) and two equivalent P(1) atoms. In the fourth P site, P(4) is bonded in a distorted water-like geometry to two equivalent Al(1) and two equivalent P(2) atoms. is represented by the CIF card [CIF]
data_AlP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.937
_cell_length_b   8.937
_cell_length_c   8.937
_cell_angle_alpha   132.265
_cell_angle_beta   122.312
_cell_angle_gamma   78.048
_symmetry_Int_Tables_number   1
_cell_volume   433.053
_cell_formula_units_Z   8
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
  Al  Al0  1  0.505  0.585  0.331  1.0
  Al  Al1  1  0.995  0.326  0.080  1.0
  Al  Al2  1  0.746  0.915  0.420  1.0
  Al  Al3  1  0.754  0.174  0.169  1.0
  Al  Al4  1  0.495  0.415  0.669  1.0
  Al  Al5  1  0.005  0.674  0.920  1.0
  Al  Al6  1  0.254  0.085  0.580  1.0
  Al  Al7  1  0.246  0.826  0.831  1.0
  P  P8  1  0.500  0.500  0.000  1.0
  P  P9  1  0.000  0.000  0.000  1.0
  P  P10  1  0.500  0.000  0.500  1.0
  P  P11  1  0.000  0.500  0.500  1.0
  P  P12  1  0.250  0.615  0.365  1.0
  P  P13  1  0.750  0.885  0.135  1.0
  P  P14  1  0.750  0.385  0.635  1.0
  P  P15  1  0.250  0.115  0.865  1.0
  P  P16  1  0.818  0.750  0.568  1.0
  P  P17  1  0.682  0.250  0.932  1.0
  P  P18  1  0.182  0.250  0.432  1.0
  P  P19  1  0.318  0.750  0.068  1.0
  P  P20  1  0.516  0.266  0.250  1.0
  P  P21  1  0.984  0.234  0.750  1.0
  P  P22  1  0.484  0.734  0.750  1.0
  P  P23  1  0.016  0.766  0.250  1.0
[/CIF]
.