The crystal structure described by Pb2Cu7(AsO4)6 crystallizes in the triclinic P-1 space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(11), one O(2), one O(3), and one O(9) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and corners with two equivalent As(3)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(10), one O(12), one O(4), one O(5), and one O(8) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(1)O4 tetrahedra, corners with two equivalent As(2)O4 tetrahedra, and corners with two equivalent As(3)O4 tetrahedra. In the third Cu site, Cu(3) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(6) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to two equivalent O(4) and two equivalent O(5) atoms. Pb(1) is bonded in a 7-coordinate geometry to one O(10), one O(3), one O(6), one O(8), one O(9), and two equivalent O(7) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(10), one O(11), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(2)O5 trigonal bipyramid and corners with two equivalent Cu(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(4), one O(7), one O(8), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(1)O5 trigonal bipyramid and corners with two equivalent Cu(2)O5 trigonal bipyramids. In the third As site, As(3) is bonded to one O(12), one O(2), one O(3), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(1)O5 trigonal bipyramids and corners with two equivalent Cu(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(3), and one As(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Cu(1), one Cu(3), and one As(3) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(1), one Pb(1), and one As(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Cu(2), one Cu(5), and one As(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Cu(2), one Cu(5), and one As(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Cu(4), one Pb(1), and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cu(2), one Pb(1), and one As(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Cu(1), one Pb(1), and one As(2) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Cu(2), one Pb(1), and one As(1) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Cu(1), one Cu(4), and one As(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one As(3) atom. is represented by the CIF file [CIF]
data_Cu7As6(PbO12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.245
_cell_length_b   8.505
_cell_length_c   11.431
_cell_angle_alpha   90.565
_cell_angle_beta   90.857
_cell_angle_gamma   93.262
_symmetry_Int_Tables_number   1
_cell_volume   509.039
_cell_formula_units_Z   1
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  0.981  0.283  0.166  1.0
  Cu  Cu1  1  0.967  0.920  0.319  1.0
  Cu  Cu2  1  0.033  0.080  0.681  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Cu  Cu4  1  0.019  0.717  0.834  1.0
  Cu  Cu5  1  0.500  0.500  0.000  1.0
  Cu  Cu6  1  0.500  0.000  0.500  1.0
  As  As7  1  0.024  0.660  0.115  1.0
  As  As8  1  0.966  0.270  0.448  1.0
  As  As9  1  0.976  0.340  0.885  1.0
  As  As10  1  0.485  0.080  0.221  1.0
  As  As11  1  0.515  0.920  0.779  1.0
  As  As12  1  0.034  0.730  0.552  1.0
  Pb  Pb13  1  0.501  0.461  0.668  1.0
  Pb  Pb14  1  0.499  0.539  0.332  1.0
  O  O15  1  0.884  0.218  0.002  1.0
  O  O16  1  0.769  0.902  0.877  1.0
  O  O17  1  0.375  0.730  0.775  1.0
  O  O18  1  0.814  0.082  0.418  1.0
  O  O19  1  0.673  0.980  0.650  1.0
  O  O20  1  0.704  0.603  0.123  1.0
  O  O21  1  0.270  0.608  0.514  1.0
  O  O22  1  0.730  0.392  0.486  1.0
  O  O23  1  0.190  0.248  0.556  1.0
  O  O24  1  0.186  0.918  0.582  1.0
  O  O25  1  0.327  0.020  0.350  1.0
  O  O26  1  0.888  0.660  0.679  1.0
  O  O27  1  0.116  0.782  0.998  1.0
  O  O28  1  0.873  0.255  0.756  1.0
  O  O29  1  0.112  0.340  0.321  1.0
  O  O30  1  0.625  0.270  0.225  1.0
  O  O31  1  0.296  0.397  0.877  1.0
  O  O32  1  0.197  0.490  0.101  1.0
  O  O33  1  0.803  0.510  0.899  1.0
  O  O34  1  0.290  0.050  0.815  1.0
  O  O35  1  0.710  0.950  0.185  1.0
  O  O36  1  0.231  0.098  0.123  1.0
  O  O37  1  0.810  0.752  0.444  1.0
  O  O38  1  0.127  0.745  0.244  1.0
[/CIF]
.
The crystal structure described by Pb2Cu7(AsO4)6 crystallizes in the triclinic P-1 space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(11), one O(2), one O(3), and one O(9) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and corners with two equivalent As(3)O4 tetrahedra. In the second Cu site, Cu(2) is bonded to one O(10), one O(12), one O(4), one O(5), and one O(8) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(1)O4 tetrahedra, corners with two equivalent As(2)O4 tetrahedra, and corners with two equivalent As(3)O4 tetrahedra. In the third Cu site, Cu(3) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(6) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to two equivalent O(4) and two equivalent O(5) atoms. Pb(1) is bonded in a 7-coordinate geometry to one O(10), one O(3), one O(6), one O(8), one O(9), and two equivalent O(7) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(10), one O(11), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(2)O5 trigonal bipyramid and corners with two equivalent Cu(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(4), one O(7), one O(8), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(1)O5 trigonal bipyramid and corners with two equivalent Cu(2)O5 trigonal bipyramids. In the third As site, As(3) is bonded to one O(12), one O(2), one O(3), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(1)O5 trigonal bipyramids and corners with two equivalent Cu(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(3), and one As(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Cu(1), one Cu(3), and one As(3) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(1), one Pb(1), and one As(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Cu(2), one Cu(5), and one As(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Cu(2), one Cu(5), and one As(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Cu(4), one Pb(1), and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cu(2), one Pb(1), and one As(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Cu(1), one Pb(1), and one As(2) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Cu(2), one Pb(1), and one As(1) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Cu(1), one Cu(4), and one As(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one As(3) atom. is represented by the CIF file [CIF]
data_Cu7As6(PbO12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.245
_cell_length_b   8.505
_cell_length_c   11.431
_cell_angle_alpha   90.565
_cell_angle_beta   90.857
_cell_angle_gamma   93.262
_symmetry_Int_Tables_number   1
_cell_volume   509.039
_cell_formula_units_Z   1
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  0.981  0.283  0.166  1.0
  Cu  Cu1  1  0.967  0.920  0.319  1.0
  Cu  Cu2  1  0.033  0.080  0.681  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Cu  Cu4  1  0.019  0.717  0.834  1.0
  Cu  Cu5  1  0.500  0.500  0.000  1.0
  Cu  Cu6  1  0.500  0.000  0.500  1.0
  As  As7  1  0.024  0.660  0.115  1.0
  As  As8  1  0.966  0.270  0.448  1.0
  As  As9  1  0.976  0.340  0.885  1.0
  As  As10  1  0.485  0.080  0.221  1.0
  As  As11  1  0.515  0.920  0.779  1.0
  As  As12  1  0.034  0.730  0.552  1.0
  Pb  Pb13  1  0.501  0.461  0.668  1.0
  Pb  Pb14  1  0.499  0.539  0.332  1.0
  O  O15  1  0.884  0.218  0.002  1.0
  O  O16  1  0.769  0.902  0.877  1.0
  O  O17  1  0.375  0.730  0.775  1.0
  O  O18  1  0.814  0.082  0.418  1.0
  O  O19  1  0.673  0.980  0.650  1.0
  O  O20  1  0.704  0.603  0.123  1.0
  O  O21  1  0.270  0.608  0.514  1.0
  O  O22  1  0.730  0.392  0.486  1.0
  O  O23  1  0.190  0.248  0.556  1.0
  O  O24  1  0.186  0.918  0.582  1.0
  O  O25  1  0.327  0.020  0.350  1.0
  O  O26  1  0.888  0.660  0.679  1.0
  O  O27  1  0.116  0.782  0.998  1.0
  O  O28  1  0.873  0.255  0.756  1.0
  O  O29  1  0.112  0.340  0.321  1.0
  O  O30  1  0.625  0.270  0.225  1.0
  O  O31  1  0.296  0.397  0.877  1.0
  O  O32  1  0.197  0.490  0.101  1.0
  O  O33  1  0.803  0.510  0.899  1.0
  O  O34  1  0.290  0.050  0.815  1.0
  O  O35  1  0.710  0.950  0.185  1.0
  O  O36  1  0.231  0.098  0.123  1.0
  O  O37  1  0.810  0.752  0.444  1.0
  O  O38  1  0.127  0.745  0.244  1.0
[/CIF]
.