The material structure described by Cu2P7 crystallizes in the monoclinic C2/m space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one P(3), one P(6), and two equivalent P(1) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra, corners with two equivalent P(3)Cu2P2 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, and corners with four equivalent P(8)CuP3 tetrahedra. In the second Cu site, Cu(2) is bonded to one P(5), one P(6), and two equivalent P(2) atoms to form distorted CuP4 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with two equivalent P(4)Cu2P2 trigonal pyramids. In the third Cu site, Cu(3) is bonded to one P(4), one P(5), and two equivalent P(7) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra, corners with two equivalent P(5)Cu2P2 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, and corners with four equivalent P(7)CuP3 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one P(3), one P(4), and two equivalent P(8) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra, corners with two equivalent P(6)Cu2P2 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with four equivalent P(1)CuP3 tetrahedra. There are nine inequivalent P sites. In the first P site, P(7) is bonded to one Cu(3), one P(5), one P(7), and one P(9) atom to form distorted PCuP3 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one P(2)CuP3 tetrahedra, corners with two equivalent Cu(3)P4 tetrahedra, corners with two equivalent P(5)Cu2P2 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the second P site, P(8) is bonded to one Cu(4), one P(1), one P(6), and one P(8) atom to form distorted PCuP3 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra,  a cornercorner with one P(6)Cu2P2 tetrahedra,  a cornercorner with one P(1)CuP3 tetrahedra,  a cornercorner with one P(2)CuP3 tetrahedra, corners with two equivalent Cu(1)P4 tetrahedra, corners with two equivalent P(3)Cu2P2 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the third P site, P(9) is bonded in a trigonal non-coplanar geometry to one P(2), one P(7), and one P(9) atom. In the fourth P site, P(1) is bonded to one Cu(1), one P(2), one P(3), and one P(8) atom to form PCuP3 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(8)CuP3 tetrahedra, corners with two equivalent Cu(4)P4 tetrahedra, corners with two equivalent P(6)Cu2P2 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the fifth P site, P(2) is bonded to one Cu(2), one P(1), one P(4), and one P(9) atom to form PCuP3 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra,  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra,  a cornercorner with one P(6)Cu2P2 tetrahedra,  a cornercorner with one P(7)CuP3 tetrahedra,  a cornercorner with one P(8)CuP3 tetrahedra, and corners with two equivalent P(2)CuP3 tetrahedra. In the sixth P site, P(3) is bonded to one Cu(1), one Cu(4), and two equivalent P(1) atoms to form PCu2P2 tetrahedra that share  a cornercorner with one P(6)Cu2P2 tetrahedra, corners with two equivalent Cu(1)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with four equivalent P(8)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the seventh P site, P(4) is bonded to one Cu(3), one Cu(4), and two equivalent P(2) atoms to form distorted PCu2P2 trigonal pyramids that share  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra, corners with two equivalent Cu(2)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, and corners with two equivalent P(8)CuP3 tetrahedra. In the eighth P site, P(5) is bonded to one Cu(2), one Cu(3), and two equivalent P(7) atoms to form PCu2P2 tetrahedra that share  a cornercorner with one P(6)Cu2P2 tetrahedra, corners with two equivalent Cu(3)P4 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with four equivalent P(7)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the ninth P site, P(6) is bonded to one Cu(1), one Cu(2), and two equivalent P(8) atoms to form distorted PCu2P2 tetrahedra that share  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra, corners with two equivalent Cu(4)P4 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with four equivalent P(1)CuP3 tetrahedra. is represented by the CIF file [CIF]
data_Cu2P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.232
_cell_length_b   7.279
_cell_length_c   14.529
_cell_angle_alpha   76.255
_cell_angle_beta   75.588
_cell_angle_gamma   60.214
_symmetry_Int_Tables_number   1
_cell_volume   637.001
_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
  Cu  Cu0  1  0.282  0.010  0.426  1.0
  Cu  Cu1  1  0.718  0.990  0.574  1.0
  Cu  Cu2  1  0.381  0.445  0.794  1.0
  Cu  Cu3  1  0.619  0.555  0.206  1.0
  Cu  Cu4  1  0.156  0.655  0.033  1.0
  Cu  Cu5  1  0.844  0.345  0.967  1.0
  Cu  Cu6  1  0.034  0.289  0.644  1.0
  Cu  Cu7  1  0.966  0.711  0.356  1.0
  P  P8  1  0.959  0.219  0.377  1.0
  P  P9  1  0.556  0.781  0.623  1.0
  P  P10  1  0.041  0.781  0.623  1.0
  P  P11  1  0.444  0.219  0.377  1.0
  P  P12  1  0.971  0.365  0.224  1.0
  P  P13  1  0.560  0.635  0.776  1.0
  P  P14  1  0.029  0.635  0.776  1.0
  P  P15  1  0.440  0.365  0.224  1.0
  P  P16  1  0.776  0.040  0.407  1.0
  P  P17  1  0.224  0.960  0.593  1.0
  P  P18  1  0.895  0.413  0.796  1.0
  P  P19  1  0.105  0.587  0.204  1.0
  P  P20  1  0.654  0.649  0.044  1.0
  P  P21  1  0.346  0.351  0.956  1.0
  P  P22  1  0.528  0.300  0.644  1.0
  P  P23  1  0.472  0.700  0.356  1.0
  P  P24  1  0.643  0.166  0.018  1.0
  P  P25  1  0.827  0.834  0.982  1.0
  P  P26  1  0.357  0.834  0.982  1.0
  P  P27  1  0.173  0.166  0.018  1.0
  P  P28  1  0.274  0.539  0.422  1.0
  P  P29  1  0.235  0.461  0.578  1.0
  P  P30  1  0.726  0.461  0.578  1.0
  P  P31  1  0.765  0.539  0.422  1.0
  P  P32  1  0.538  0.070  0.169  1.0
  P  P33  1  0.777  0.930  0.831  1.0
  P  P34  1  0.462  0.930  0.831  1.0
  P  P35  1  0.223  0.070  0.169  1.0
[/CIF]
.
The material structure described by Cu2P7 crystallizes in the monoclinic C2/m space group. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one P(3), one P(6), and two equivalent P(1) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra, corners with two equivalent P(3)Cu2P2 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, and corners with four equivalent P(8)CuP3 tetrahedra. In the second Cu site, Cu(2) is bonded to one P(5), one P(6), and two equivalent P(2) atoms to form distorted CuP4 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with two equivalent P(4)Cu2P2 trigonal pyramids. In the third Cu site, Cu(3) is bonded to one P(4), one P(5), and two equivalent P(7) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra, corners with two equivalent P(5)Cu2P2 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, and corners with four equivalent P(7)CuP3 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one P(3), one P(4), and two equivalent P(8) atoms to form CuP4 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra, corners with two equivalent P(6)Cu2P2 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with four equivalent P(1)CuP3 tetrahedra. There are nine inequivalent P sites. In the first P site, P(7) is bonded to one Cu(3), one P(5), one P(7), and one P(9) atom to form distorted PCuP3 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one P(2)CuP3 tetrahedra, corners with two equivalent Cu(3)P4 tetrahedra, corners with two equivalent P(5)Cu2P2 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the second P site, P(8) is bonded to one Cu(4), one P(1), one P(6), and one P(8) atom to form distorted PCuP3 tetrahedra that share  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra,  a cornercorner with one P(6)Cu2P2 tetrahedra,  a cornercorner with one P(1)CuP3 tetrahedra,  a cornercorner with one P(2)CuP3 tetrahedra, corners with two equivalent Cu(1)P4 tetrahedra, corners with two equivalent P(3)Cu2P2 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the third P site, P(9) is bonded in a trigonal non-coplanar geometry to one P(2), one P(7), and one P(9) atom. In the fourth P site, P(1) is bonded to one Cu(1), one P(2), one P(3), and one P(8) atom to form PCuP3 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(2)P4 tetrahedra,  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(8)CuP3 tetrahedra, corners with two equivalent Cu(4)P4 tetrahedra, corners with two equivalent P(6)Cu2P2 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the fifth P site, P(2) is bonded to one Cu(2), one P(1), one P(4), and one P(9) atom to form PCuP3 tetrahedra that share  a cornercorner with one Cu(1)P4 tetrahedra,  a cornercorner with one Cu(3)P4 tetrahedra,  a cornercorner with one Cu(4)P4 tetrahedra,  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra,  a cornercorner with one P(6)Cu2P2 tetrahedra,  a cornercorner with one P(7)CuP3 tetrahedra,  a cornercorner with one P(8)CuP3 tetrahedra, and corners with two equivalent P(2)CuP3 tetrahedra. In the sixth P site, P(3) is bonded to one Cu(1), one Cu(4), and two equivalent P(1) atoms to form PCu2P2 tetrahedra that share  a cornercorner with one P(6)Cu2P2 tetrahedra, corners with two equivalent Cu(1)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with four equivalent P(8)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the seventh P site, P(4) is bonded to one Cu(3), one Cu(4), and two equivalent P(2) atoms to form distorted PCu2P2 trigonal pyramids that share  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra, corners with two equivalent Cu(2)P4 tetrahedra, corners with two equivalent P(1)CuP3 tetrahedra, corners with two equivalent P(7)CuP3 tetrahedra, and corners with two equivalent P(8)CuP3 tetrahedra. In the eighth P site, P(5) is bonded to one Cu(2), one Cu(3), and two equivalent P(7) atoms to form PCu2P2 tetrahedra that share  a cornercorner with one P(6)Cu2P2 tetrahedra, corners with two equivalent Cu(3)P4 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with four equivalent P(7)CuP3 tetrahedra, and  a cornercorner with one P(4)Cu2P2 trigonal pyramid. In the ninth P site, P(6) is bonded to one Cu(1), one Cu(2), and two equivalent P(8) atoms to form distorted PCu2P2 tetrahedra that share  a cornercorner with one P(3)Cu2P2 tetrahedra,  a cornercorner with one P(5)Cu2P2 tetrahedra, corners with two equivalent Cu(4)P4 tetrahedra, corners with two equivalent P(2)CuP3 tetrahedra, corners with two equivalent P(8)CuP3 tetrahedra, and corners with four equivalent P(1)CuP3 tetrahedra. is represented by the CIF file [CIF]
data_Cu2P7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.232
_cell_length_b   7.279
_cell_length_c   14.529
_cell_angle_alpha   76.255
_cell_angle_beta   75.588
_cell_angle_gamma   60.214
_symmetry_Int_Tables_number   1
_cell_volume   637.001
_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
  Cu  Cu0  1  0.282  0.010  0.426  1.0
  Cu  Cu1  1  0.718  0.990  0.574  1.0
  Cu  Cu2  1  0.381  0.445  0.794  1.0
  Cu  Cu3  1  0.619  0.555  0.206  1.0
  Cu  Cu4  1  0.156  0.655  0.033  1.0
  Cu  Cu5  1  0.844  0.345  0.967  1.0
  Cu  Cu6  1  0.034  0.289  0.644  1.0
  Cu  Cu7  1  0.966  0.711  0.356  1.0
  P  P8  1  0.959  0.219  0.377  1.0
  P  P9  1  0.556  0.781  0.623  1.0
  P  P10  1  0.041  0.781  0.623  1.0
  P  P11  1  0.444  0.219  0.377  1.0
  P  P12  1  0.971  0.365  0.224  1.0
  P  P13  1  0.560  0.635  0.776  1.0
  P  P14  1  0.029  0.635  0.776  1.0
  P  P15  1  0.440  0.365  0.224  1.0
  P  P16  1  0.776  0.040  0.407  1.0
  P  P17  1  0.224  0.960  0.593  1.0
  P  P18  1  0.895  0.413  0.796  1.0
  P  P19  1  0.105  0.587  0.204  1.0
  P  P20  1  0.654  0.649  0.044  1.0
  P  P21  1  0.346  0.351  0.956  1.0
  P  P22  1  0.528  0.300  0.644  1.0
  P  P23  1  0.472  0.700  0.356  1.0
  P  P24  1  0.643  0.166  0.018  1.0
  P  P25  1  0.827  0.834  0.982  1.0
  P  P26  1  0.357  0.834  0.982  1.0
  P  P27  1  0.173  0.166  0.018  1.0
  P  P28  1  0.274  0.539  0.422  1.0
  P  P29  1  0.235  0.461  0.578  1.0
  P  P30  1  0.726  0.461  0.578  1.0
  P  P31  1  0.765  0.539  0.422  1.0
  P  P32  1  0.538  0.070  0.169  1.0
  P  P33  1  0.777  0.930  0.831  1.0
  P  P34  1  0.462  0.930  0.831  1.0
  P  P35  1  0.223  0.070  0.169  1.0
[/CIF]
.