The structure described by LaPP crystallizes in the monoclinic Cc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(6), one P(7), two equivalent P(5), and two equivalent P(8) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one P(1), one P(2), one P(3), one P(4), one P(6), two equivalent P(5), and two equivalent P(7) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(6), one P(8), two equivalent P(1), and two equivalent P(7) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(5), one P(6), two equivalent P(1), and two equivalent P(8) atoms. There are eight inequivalent P sites. In the first P site, P(1) is bonded in a 6-coordinate geometry to one La(2), two equivalent La(3), two equivalent La(4), and one P(2) atom. In the second P site, P(2) is bonded in a distorted hexagonal planar geometry to one La(1), one La(2), one La(3), one La(4), one P(1), and one P(3) atom. In the third P site, P(3) is bonded to one La(1), one La(2), one La(3), one La(4), one P(2), and one P(4) atom to form a mixture of distorted corner and edge-sharing PLa4P2 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 38-95°. In the fourth P site, P(4) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one P(3), and one P(8) atom. In the fifth P site, P(5) is bonded to one La(4), two equivalent La(1), two equivalent La(2), and one P(6) atom to form distorted PLa5P octahedra that share corners with two equivalent P(8)La5P octahedra, corners with four equivalent P(5)La5P octahedra, corners with two equivalent P(7)La5P pentagonal pyramids, corners with three equivalent P(3)La4P2 pentagonal pyramids, edges with two equivalent P(8)La5P octahedra,  an edgeedge with one P(3)La4P2 pentagonal pyramid,  an edgeedge with one P(7)La5P pentagonal pyramid, and  a faceface with one P(7)La5P pentagonal pyramid. The corner-sharing octahedral tilt angles range from 33-55°. In the sixth P site, P(6) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one P(5), and one P(7) atom. In the seventh P site, P(7) is bonded to one La(1), two equivalent La(2), two equivalent La(3), and one P(6) atom to form distorted PLa5P pentagonal pyramids that share corners with two equivalent P(5)La5P octahedra, corners with three equivalent P(3)La4P2 pentagonal pyramids, corners with four equivalent P(7)La5P pentagonal pyramids,  an edgeedge with one P(5)La5P octahedra, edges with two equivalent P(8)La5P octahedra,  an edgeedge with one P(3)La4P2 pentagonal pyramid, and  a faceface with one P(5)La5P octahedra. The corner-sharing octahedral tilt angles range from 35-49°. In the eighth P site, P(8) is bonded to one La(3), two equivalent La(1), two equivalent La(4), and one P(4) atom to form distorted PLa5P octahedra that share corners with two equivalent P(5)La5P octahedra, corners with four equivalent P(8)La5P octahedra, corners with two equivalent P(3)La4P2 pentagonal pyramids, edges with two equivalent P(5)La5P octahedra, edges with two equivalent P(3)La4P2 pentagonal pyramids, and edges with two equivalent P(7)La5P pentagonal pyramids. The corner-sharing octahedral tilt angles range from 34-53°. is represented by the CIF file [CIF]
data_LaP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.873
_cell_length_b   8.953
_cell_length_c   9.421
_cell_angle_alpha   118.288
_cell_angle_beta   118.012
_cell_angle_gamma   90.157
_symmetry_Int_Tables_number   1
_cell_volume   556.846
_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
  La  La0  1  0.034  0.591  0.424  1.0
  La  La1  1  0.610  0.667  0.576  1.0
  La  La2  1  0.942  0.441  0.884  1.0
  La  La3  1  0.058  0.057  0.116  1.0
  La  La4  1  0.423  0.068  0.586  1.0
  La  La5  1  0.837  0.983  0.414  1.0
  La  La6  1  0.377  0.681  0.956  1.0
  La  La7  1  0.421  0.225  0.044  1.0
  P  P8  1  0.183  0.279  0.730  1.0
  P  P9  1  0.454  0.050  0.270  1.0
  P  P10  1  0.249  0.351  0.570  1.0
  P  P11  1  0.679  0.281  0.430  1.0
  P  P12  1  0.795  0.206  0.241  1.0
  P  P13  1  0.554  0.464  0.759  1.0
  P  P14  1  0.662  0.412  0.989  1.0
  P  P15  1  0.673  0.923  0.011  1.0
  P  P16  1  0.232  0.433  0.234  1.0
  P  P17  1  0.997  0.699  0.766  1.0
  P  P18  1  0.279  0.681  0.245  1.0
  P  P19  1  0.034  0.936  0.755  1.0
  P  P20  1  0.808  0.046  0.742  1.0
  P  P21  1  0.066  0.804  0.258  1.0
  P  P22  1  0.413  0.865  0.762  1.0
  P  P23  1  0.651  0.603  0.238  1.0
[/CIF]
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The structure described by LaPP crystallizes in the monoclinic Cc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(6), one P(7), two equivalent P(5), and two equivalent P(8) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one P(1), one P(2), one P(3), one P(4), one P(6), two equivalent P(5), and two equivalent P(7) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(6), one P(8), two equivalent P(1), and two equivalent P(7) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one P(2), one P(3), one P(4), one P(5), one P(6), two equivalent P(1), and two equivalent P(8) atoms. There are eight inequivalent P sites. In the first P site, P(1) is bonded in a 6-coordinate geometry to one La(2), two equivalent La(3), two equivalent La(4), and one P(2) atom. In the second P site, P(2) is bonded in a distorted hexagonal planar geometry to one La(1), one La(2), one La(3), one La(4), one P(1), and one P(3) atom. In the third P site, P(3) is bonded to one La(1), one La(2), one La(3), one La(4), one P(2), and one P(4) atom to form a mixture of distorted corner and edge-sharing PLa4P2 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 38-95°. In the fourth P site, P(4) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one P(3), and one P(8) atom. In the fifth P site, P(5) is bonded to one La(4), two equivalent La(1), two equivalent La(2), and one P(6) atom to form distorted PLa5P octahedra that share corners with two equivalent P(8)La5P octahedra, corners with four equivalent P(5)La5P octahedra, corners with two equivalent P(7)La5P pentagonal pyramids, corners with three equivalent P(3)La4P2 pentagonal pyramids, edges with two equivalent P(8)La5P octahedra,  an edgeedge with one P(3)La4P2 pentagonal pyramid,  an edgeedge with one P(7)La5P pentagonal pyramid, and  a faceface with one P(7)La5P pentagonal pyramid. The corner-sharing octahedral tilt angles range from 33-55°. In the sixth P site, P(6) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one P(5), and one P(7) atom. In the seventh P site, P(7) is bonded to one La(1), two equivalent La(2), two equivalent La(3), and one P(6) atom to form distorted PLa5P pentagonal pyramids that share corners with two equivalent P(5)La5P octahedra, corners with three equivalent P(3)La4P2 pentagonal pyramids, corners with four equivalent P(7)La5P pentagonal pyramids,  an edgeedge with one P(5)La5P octahedra, edges with two equivalent P(8)La5P octahedra,  an edgeedge with one P(3)La4P2 pentagonal pyramid, and  a faceface with one P(5)La5P octahedra. The corner-sharing octahedral tilt angles range from 35-49°. In the eighth P site, P(8) is bonded to one La(3), two equivalent La(1), two equivalent La(4), and one P(4) atom to form distorted PLa5P octahedra that share corners with two equivalent P(5)La5P octahedra, corners with four equivalent P(8)La5P octahedra, corners with two equivalent P(3)La4P2 pentagonal pyramids, edges with two equivalent P(5)La5P octahedra, edges with two equivalent P(3)La4P2 pentagonal pyramids, and edges with two equivalent P(7)La5P pentagonal pyramids. The corner-sharing octahedral tilt angles range from 34-53°. is represented by the CIF file [CIF]
data_LaP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.873
_cell_length_b   8.953
_cell_length_c   9.421
_cell_angle_alpha   118.288
_cell_angle_beta   118.012
_cell_angle_gamma   90.157
_symmetry_Int_Tables_number   1
_cell_volume   556.846
_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
  La  La0  1  0.034  0.591  0.424  1.0
  La  La1  1  0.610  0.667  0.576  1.0
  La  La2  1  0.942  0.441  0.884  1.0
  La  La3  1  0.058  0.057  0.116  1.0
  La  La4  1  0.423  0.068  0.586  1.0
  La  La5  1  0.837  0.983  0.414  1.0
  La  La6  1  0.377  0.681  0.956  1.0
  La  La7  1  0.421  0.225  0.044  1.0
  P  P8  1  0.183  0.279  0.730  1.0
  P  P9  1  0.454  0.050  0.270  1.0
  P  P10  1  0.249  0.351  0.570  1.0
  P  P11  1  0.679  0.281  0.430  1.0
  P  P12  1  0.795  0.206  0.241  1.0
  P  P13  1  0.554  0.464  0.759  1.0
  P  P14  1  0.662  0.412  0.989  1.0
  P  P15  1  0.673  0.923  0.011  1.0
  P  P16  1  0.232  0.433  0.234  1.0
  P  P17  1  0.997  0.699  0.766  1.0
  P  P18  1  0.279  0.681  0.245  1.0
  P  P19  1  0.034  0.936  0.755  1.0
  P  P20  1  0.808  0.046  0.742  1.0
  P  P21  1  0.066  0.804  0.258  1.0
  P  P22  1  0.413  0.865  0.762  1.0
  P  P23  1  0.651  0.603  0.238  1.0
[/CIF]
.