The material structure described by LaP7 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 10-coordinate geometry to one P(1), one P(2), one P(3), one P(6), two equivalent P(4), two equivalent P(5), and two equivalent P(7) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded to one La(1), one P(4), one P(5), and one P(7) atom to form PLaP3 tetrahedra that share corners with two equivalent P(5)La2P2 tetrahedra, corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, and corners with two equivalent P(4)La2P2 trigonal pyramids. In the second P site, P(2) is bonded to one La(1), one P(2), one P(3), and one P(7) atom to form PLaP3 tetrahedra that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(7)La2P2 tetrahedra, and corners with two equivalent P(4)La2P2 trigonal pyramids. In the third P site, P(3) is bonded to one La(1), one P(2), one P(5), and one P(6) atom to form PLaP3 tetrahedra that share  a cornercorner with one P(7)La2P2 tetrahedra, corners with two equivalent P(5)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids, and  an edgeedge with one P(7)La2P2 tetrahedra. In the fourth P site, P(4) is bonded to two equivalent La(1), one P(1), and one P(6) atom to form PLa2P2 trigonal pyramids that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(7)La2P2 tetrahedra, corners with three equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(6)LaP3 tetrahedra, corners with two equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(5)La2P2 tetrahedra, and  an edgeedge with one P(7)La2P2 tetrahedra. In the fifth P site, P(5) is bonded to two equivalent La(1), one P(1), and one P(3) atom to form PLa2P2 tetrahedra that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(2)LaP3 tetrahedra, corners with three equivalent P(6)LaP3 tetrahedra, corners with five equivalent P(7)La2P2 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(5)La2P2 tetrahedra, and  an edgeedge with one P(4)La2P2 trigonal pyramid. In the sixth P site, P(6) is bonded to one La(1), one P(3), one P(4), and one P(6) atom to form PLaP3 tetrahedra that share corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, and corners with three equivalent P(4)La2P2 trigonal pyramids. In the seventh P site, P(7) is bonded to two equivalent La(1), one P(1), and one P(2) atom to form PLa2P2 tetrahedra that share  a cornercorner with one P(3)LaP3 tetrahedra, corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(2)LaP3 tetrahedra, corners with five equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(3)LaP3 tetrahedra, and  an edgeedge with one P(4)La2P2 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaP7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.041
_cell_length_b   7.978
_cell_length_c   11.747
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   93.335
_symmetry_Int_Tables_number   1
_cell_volume   658.730
_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
  La  La0  1  0.397  0.283  0.349  1.0
  La  La1  1  0.103  0.217  0.849  1.0
  La  La2  1  0.603  0.717  0.651  1.0
  La  La3  1  0.897  0.783  0.151  1.0
  P  P4  1  0.462  0.749  0.220  1.0
  P  P5  1  0.038  0.751  0.720  1.0
  P  P6  1  0.538  0.251  0.780  1.0
  P  P7  1  0.962  0.249  0.280  1.0
  P  P8  1  0.906  0.590  0.465  1.0
  P  P9  1  0.594  0.910  0.965  1.0
  P  P10  1  0.094  0.410  0.535  1.0
  P  P11  1  0.406  0.090  0.035  1.0
  P  P12  1  0.625  0.262  0.113  1.0
  P  P13  1  0.875  0.238  0.613  1.0
  P  P14  1  0.375  0.738  0.887  1.0
  P  P15  1  0.125  0.762  0.387  1.0
  P  P16  1  0.753  0.049  0.339  1.0
  P  P17  1  0.747  0.451  0.839  1.0
  P  P18  1  0.247  0.951  0.661  1.0
  P  P19  1  0.253  0.549  0.161  1.0
  P  P20  1  0.912  0.180  0.100  1.0
  P  P21  1  0.588  0.320  0.600  1.0
  P  P22  1  0.088  0.820  0.900  1.0
  P  P23  1  0.412  0.680  0.400  1.0
  P  P24  1  0.846  0.009  0.511  1.0
  P  P25  1  0.654  0.491  0.011  1.0
  P  P26  1  0.154  0.991  0.489  1.0
  P  P27  1  0.346  0.509  0.989  1.0
  P  P28  1  0.788  0.471  0.311  1.0
  P  P29  1  0.712  0.029  0.811  1.0
  P  P30  1  0.212  0.529  0.689  1.0
  P  P31  1  0.288  0.971  0.189  1.0
[/CIF]
.
The material structure described by LaP7 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 10-coordinate geometry to one P(1), one P(2), one P(3), one P(6), two equivalent P(4), two equivalent P(5), and two equivalent P(7) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded to one La(1), one P(4), one P(5), and one P(7) atom to form PLaP3 tetrahedra that share corners with two equivalent P(5)La2P2 tetrahedra, corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, and corners with two equivalent P(4)La2P2 trigonal pyramids. In the second P site, P(2) is bonded to one La(1), one P(2), one P(3), and one P(7) atom to form PLaP3 tetrahedra that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(7)La2P2 tetrahedra, and corners with two equivalent P(4)La2P2 trigonal pyramids. In the third P site, P(3) is bonded to one La(1), one P(2), one P(5), and one P(6) atom to form PLaP3 tetrahedra that share  a cornercorner with one P(7)La2P2 tetrahedra, corners with two equivalent P(5)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids, and  an edgeedge with one P(7)La2P2 tetrahedra. In the fourth P site, P(4) is bonded to two equivalent La(1), one P(1), and one P(6) atom to form PLa2P2 trigonal pyramids that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(7)La2P2 tetrahedra, corners with three equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(6)LaP3 tetrahedra, corners with two equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(5)La2P2 tetrahedra, and  an edgeedge with one P(7)La2P2 tetrahedra. In the fifth P site, P(5) is bonded to two equivalent La(1), one P(1), and one P(3) atom to form PLa2P2 tetrahedra that share corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(2)LaP3 tetrahedra, corners with three equivalent P(6)LaP3 tetrahedra, corners with five equivalent P(7)La2P2 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(5)La2P2 tetrahedra, and  an edgeedge with one P(4)La2P2 trigonal pyramid. In the sixth P site, P(6) is bonded to one La(1), one P(3), one P(4), and one P(6) atom to form PLaP3 tetrahedra that share corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(2)LaP3 tetrahedra, corners with two equivalent P(3)LaP3 tetrahedra, corners with three equivalent P(5)La2P2 tetrahedra, and corners with three equivalent P(4)La2P2 trigonal pyramids. In the seventh P site, P(7) is bonded to two equivalent La(1), one P(1), and one P(2) atom to form PLa2P2 tetrahedra that share  a cornercorner with one P(3)LaP3 tetrahedra, corners with two equivalent P(7)La2P2 tetrahedra, corners with two equivalent P(1)LaP3 tetrahedra, corners with two equivalent P(6)LaP3 tetrahedra, corners with three equivalent P(2)LaP3 tetrahedra, corners with five equivalent P(5)La2P2 tetrahedra, corners with three equivalent P(4)La2P2 trigonal pyramids,  an edgeedge with one P(3)LaP3 tetrahedra, and  an edgeedge with one P(4)La2P2 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaP7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.041
_cell_length_b   7.978
_cell_length_c   11.747
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   93.335
_symmetry_Int_Tables_number   1
_cell_volume   658.730
_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
  La  La0  1  0.397  0.283  0.349  1.0
  La  La1  1  0.103  0.217  0.849  1.0
  La  La2  1  0.603  0.717  0.651  1.0
  La  La3  1  0.897  0.783  0.151  1.0
  P  P4  1  0.462  0.749  0.220  1.0
  P  P5  1  0.038  0.751  0.720  1.0
  P  P6  1  0.538  0.251  0.780  1.0
  P  P7  1  0.962  0.249  0.280  1.0
  P  P8  1  0.906  0.590  0.465  1.0
  P  P9  1  0.594  0.910  0.965  1.0
  P  P10  1  0.094  0.410  0.535  1.0
  P  P11  1  0.406  0.090  0.035  1.0
  P  P12  1  0.625  0.262  0.113  1.0
  P  P13  1  0.875  0.238  0.613  1.0
  P  P14  1  0.375  0.738  0.887  1.0
  P  P15  1  0.125  0.762  0.387  1.0
  P  P16  1  0.753  0.049  0.339  1.0
  P  P17  1  0.747  0.451  0.839  1.0
  P  P18  1  0.247  0.951  0.661  1.0
  P  P19  1  0.253  0.549  0.161  1.0
  P  P20  1  0.912  0.180  0.100  1.0
  P  P21  1  0.588  0.320  0.600  1.0
  P  P22  1  0.088  0.820  0.900  1.0
  P  P23  1  0.412  0.680  0.400  1.0
  P  P24  1  0.846  0.009  0.511  1.0
  P  P25  1  0.654  0.491  0.011  1.0
  P  P26  1  0.154  0.991  0.489  1.0
  P  P27  1  0.346  0.509  0.989  1.0
  P  P28  1  0.788  0.471  0.311  1.0
  P  P29  1  0.712  0.029  0.811  1.0
  P  P30  1  0.212  0.529  0.689  1.0
  P  P31  1  0.288  0.971  0.189  1.0
[/CIF]
.