The compound described by Cu4PbAs3O12 crystallizes in the triclinic P-1 space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to one O(10), one O(3), and one O(4) atom. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(12) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(11), one O(2), one O(3), and one O(7) 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 fifth Cu site, Cu(5) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(9) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(3)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and corners with two equivalent As(2)O4 tetrahedra. Pb(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(5), one O(7), and two equivalent O(8) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(4)O5 trigonal bipyramids and corners with two equivalent Cu(5)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(4)O5 trigonal bipyramid and corners with two equivalent Cu(5)O5 trigonal bipyramids. In the third As site, As(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(5)O5 trigonal bipyramid and corners with two equivalent Cu(4)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cu(3), one Cu(5), and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(4), one Pb(1), and one As(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Cu(1), one Cu(4), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(5), and one As(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cu(5), one Pb(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Cu(3), one Cu(5), and one As(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cu(4), one Pb(1), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(2) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(5) and one As(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(4), and one As(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and one As(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(2), one Pb(1), and one As(3) atom. is represented by the CIF file [CIF]
data_Cu4As3PbO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.303
_cell_length_b   8.563
_cell_length_c   11.520
_cell_angle_alpha   89.527
_cell_angle_beta   90.103
_cell_angle_gamma   86.253
_symmetry_Int_Tables_number   1
_cell_volume   521.976
_cell_formula_units_Z   2
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  0.272  0.950  0.977  1.0
  Cu  Cu1  1  0.728  0.050  0.023  1.0
  Cu  Cu2  1  0.500  0.500  0.000  1.0
  Cu  Cu3  1  0.500  0.000  0.500  1.0
  Cu  Cu4  1  0.983  0.705  0.169  1.0
  Cu  Cu5  1  0.017  0.295  0.831  1.0
  Cu  Cu6  1  0.966  0.081  0.320  1.0
  Cu  Cu7  1  0.034  0.919  0.680  1.0
  As  As8  1  0.482  0.903  0.232  1.0
  As  As9  1  0.518  0.097  0.768  1.0
  As  As10  1  0.961  0.729  0.449  1.0
  As  As11  1  0.039  0.271  0.551  1.0
  As  As12  1  0.041  0.340  0.111  1.0
  As  As13  1  0.959  0.660  0.889  1.0
  Pb  Pb14  1  0.497  0.459  0.331  1.0
  Pb  Pb15  1  0.503  0.541  0.669  1.0
  O  O16  1  0.325  0.974  0.356  1.0
  O  O17  1  0.675  0.026  0.644  1.0
  O  O18  1  0.633  0.719  0.237  1.0
  O  O19  1  0.367  0.281  0.763  1.0
  O  O20  1  0.235  0.895  0.133  1.0
  O  O21  1  0.765  0.105  0.867  1.0
  O  O22  1  0.697  0.037  0.186  1.0
  O  O23  1  0.303  0.963  0.814  1.0
  O  O24  1  0.175  0.752  0.559  1.0
  O  O25  1  0.825  0.248  0.441  1.0
  O  O26  1  0.811  0.918  0.417  1.0
  O  O27  1  0.189  0.082  0.583  1.0
  O  O28  1  0.118  0.660  0.325  1.0
  O  O29  1  0.882  0.340  0.675  1.0
  O  O30  1  0.726  0.609  0.486  1.0
  O  O31  1  0.274  0.391  0.514  1.0
  O  O32  1  0.134  0.243  0.236  1.0
  O  O33  1  0.866  0.757  0.764  1.0
  O  O34  1  0.136  0.234  0.989  1.0
  O  O35  1  0.864  0.766  0.011  1.0
  O  O36  1  0.216  0.509  0.112  1.0
  O  O37  1  0.784  0.491  0.888  1.0
  O  O38  1  0.721  0.396  0.118  1.0
  O  O39  1  0.279  0.604  0.882  1.0
[/CIF]
.
The compound described by Cu4PbAs3O12 crystallizes in the triclinic P-1 space group. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to one O(10), one O(3), and one O(4) atom. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(11) and two equivalent O(12) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(11), one O(2), one O(3), and one O(7) 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 fifth Cu site, Cu(5) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(9) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one As(3)O4 tetrahedra, corners with two equivalent As(1)O4 tetrahedra, and corners with two equivalent As(2)O4 tetrahedra. Pb(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(5), one O(7), and two equivalent O(8) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(4)O5 trigonal bipyramids and corners with two equivalent Cu(5)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(4)O5 trigonal bipyramid and corners with two equivalent Cu(5)O5 trigonal bipyramids. In the third As site, As(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one Cu(5)O5 trigonal bipyramid and corners with two equivalent Cu(4)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cu(3), one Cu(5), and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(4), one Pb(1), and one As(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Cu(1), one Cu(4), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(5), and one As(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cu(5), one Pb(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Cu(3), one Cu(5), and one As(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cu(4), one Pb(1), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(2) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Cu(5) and one As(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(4), and one As(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Cu(2), one Cu(4), and one As(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Cu(2), one Pb(1), and one As(3) atom. is represented by the CIF file [CIF]
data_Cu4As3PbO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.303
_cell_length_b   8.563
_cell_length_c   11.520
_cell_angle_alpha   89.527
_cell_angle_beta   90.103
_cell_angle_gamma   86.253
_symmetry_Int_Tables_number   1
_cell_volume   521.976
_cell_formula_units_Z   2
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  0.272  0.950  0.977  1.0
  Cu  Cu1  1  0.728  0.050  0.023  1.0
  Cu  Cu2  1  0.500  0.500  0.000  1.0
  Cu  Cu3  1  0.500  0.000  0.500  1.0
  Cu  Cu4  1  0.983  0.705  0.169  1.0
  Cu  Cu5  1  0.017  0.295  0.831  1.0
  Cu  Cu6  1  0.966  0.081  0.320  1.0
  Cu  Cu7  1  0.034  0.919  0.680  1.0
  As  As8  1  0.482  0.903  0.232  1.0
  As  As9  1  0.518  0.097  0.768  1.0
  As  As10  1  0.961  0.729  0.449  1.0
  As  As11  1  0.039  0.271  0.551  1.0
  As  As12  1  0.041  0.340  0.111  1.0
  As  As13  1  0.959  0.660  0.889  1.0
  Pb  Pb14  1  0.497  0.459  0.331  1.0
  Pb  Pb15  1  0.503  0.541  0.669  1.0
  O  O16  1  0.325  0.974  0.356  1.0
  O  O17  1  0.675  0.026  0.644  1.0
  O  O18  1  0.633  0.719  0.237  1.0
  O  O19  1  0.367  0.281  0.763  1.0
  O  O20  1  0.235  0.895  0.133  1.0
  O  O21  1  0.765  0.105  0.867  1.0
  O  O22  1  0.697  0.037  0.186  1.0
  O  O23  1  0.303  0.963  0.814  1.0
  O  O24  1  0.175  0.752  0.559  1.0
  O  O25  1  0.825  0.248  0.441  1.0
  O  O26  1  0.811  0.918  0.417  1.0
  O  O27  1  0.189  0.082  0.583  1.0
  O  O28  1  0.118  0.660  0.325  1.0
  O  O29  1  0.882  0.340  0.675  1.0
  O  O30  1  0.726  0.609  0.486  1.0
  O  O31  1  0.274  0.391  0.514  1.0
  O  O32  1  0.134  0.243  0.236  1.0
  O  O33  1  0.866  0.757  0.764  1.0
  O  O34  1  0.136  0.234  0.989  1.0
  O  O35  1  0.864  0.766  0.011  1.0
  O  O36  1  0.216  0.509  0.112  1.0
  O  O37  1  0.784  0.491  0.888  1.0
  O  O38  1  0.721  0.396  0.118  1.0
  O  O39  1  0.279  0.604  0.882  1.0
[/CIF]
.