The compound described by Y6Cu15P16 crystallizes in the monoclinic Pm space group. There are six inequivalent Y sites. In the first Y site, Y(1) is bonded in a 13-coordinate geometry to one Cu(11), one Cu(6), two equivalent Cu(12), two equivalent Cu(5), one P(10), one P(13), one P(3), two equivalent P(4), and two equivalent P(9) atoms. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to one Cu(12), one Cu(13), one Cu(5), two equivalent Cu(11), two equivalent Cu(6), one P(14), one P(4), one P(9), two equivalent P(10), and two equivalent P(3) atoms. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to one Cu(14), one Cu(8), one Cu(9), two equivalent Cu(10), two equivalent Cu(7), one P(1), one P(12), one P(15), two equivalent P(11), and two equivalent P(2) atoms. In the fourth Y site, Y(4) is bonded in a 14-coordinate geometry to one Cu(10), one Cu(15), one Cu(7), two equivalent Cu(8), two equivalent Cu(9), one P(11), one P(16), one P(2), two equivalent P(1), and two equivalent P(12) atoms. In the fifth Y site, Y(5) is bonded in a 14-coordinate geometry to one Cu(1), one Cu(3), two equivalent Cu(2), two equivalent Cu(4), one P(14), one P(16), one P(6), one P(8), two equivalent P(5), and two equivalent P(7) atoms. In the sixth Y site, Y(6) is bonded in a 14-coordinate geometry to one Cu(2), one Cu(4), two equivalent Cu(1), two equivalent Cu(3), one P(13), one P(15), one P(5), one P(7), two equivalent P(6), and two equivalent P(8) atoms. There are fifteen inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to one Y(5), two equivalent Y(6), one P(14), one P(8), one P(9), two equivalent P(13), and two equivalent P(7) atoms. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to one Y(6), two equivalent Y(5), one P(10), one P(13), one P(7), two equivalent P(14), and two equivalent P(8) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Y(5), two equivalent Y(6), one P(11), one P(16), one P(6), two equivalent P(15), and two equivalent P(5) atoms. In the fourth Cu site, Cu(4) is bonded in a 10-coordinate geometry to one Y(6), two equivalent Y(5), one P(12), one P(15), one P(5), two equivalent P(16), and two equivalent P(6) atoms. In the fifth Cu site, Cu(5) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Y(1), one P(4), and two equivalent P(3) atoms. In the sixth Cu site, Cu(6) is bonded in a 3-coordinate geometry to one Y(1), two equivalent Y(2), one P(3), and two equivalent P(4) atoms. In the seventh Cu site, Cu(7) is bonded in a distorted trigonal planar geometry to one Y(4), two equivalent Y(3), one P(2), and two equivalent P(1) atoms. In the eighth Cu site, Cu(8) is bonded in a distorted trigonal planar geometry to one Y(3), two equivalent Y(4), one P(1), and two equivalent P(2) atoms. In the ninth Cu site, Cu(9) is bonded in a 10-coordinate geometry to one Y(3), two equivalent Y(4), one P(12), one P(15), one P(5), two equivalent P(11), and two equivalent P(16) atoms. In the tenth Cu site, Cu(10) is bonded in a 10-coordinate geometry to one Y(4), two equivalent Y(3), one P(11), one P(16), one P(6), two equivalent P(12), and two equivalent P(15) atoms. In the eleventh Cu site, Cu(11) is bonded in a 10-coordinate geometry to one Y(1), two equivalent Y(2), one P(10), one P(13), one P(7), two equivalent P(14), and two equivalent P(9) atoms. In the twelfth Cu site, Cu(12) is bonded in a 10-coordinate geometry to one Y(2), two equivalent Y(1), one P(14), one P(8), one P(9), two equivalent P(10), and two equivalent P(13) atoms. In the thirteenth Cu site, Cu(13) is bonded in a distorted single-bond geometry to one Y(2), one P(2), one P(4), and two equivalent P(3) atoms. In the fourteenth Cu site, Cu(14) is bonded in a 2-coordinate geometry to one Y(3), one P(1), and one P(3) atom. In the fifteenth Cu site, Cu(15) is bonded in a 1-coordinate geometry to one Y(4), one P(4), and two equivalent P(1) atoms. There are sixteen inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(4), one Cu(14), one Cu(8), two equivalent Cu(15), and two equivalent Cu(7) atoms. In the second P site, P(2) is bonded in a 7-coordinate geometry to one Y(4), two equivalent Y(3), one Cu(13), one Cu(7), and two equivalent Cu(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), one Cu(14), one Cu(6), two equivalent Cu(13), and two equivalent Cu(5) atoms. In the fourth P site, P(4) is bonded in a 8-coordinate geometry to one Y(2), two equivalent Y(1), one Cu(13), one Cu(15), one Cu(5), and two equivalent Cu(6) atoms. In the fifth P site, P(5) is bonded in a 7-coordinate geometry to one Y(6), two equivalent Y(5), one Cu(4), one Cu(9), and two equivalent Cu(3) atoms. In the sixth P site, P(6) is bonded in a 7-coordinate geometry to one Y(5), two equivalent Y(6), one Cu(10), one Cu(3), and two equivalent Cu(4) atoms. In the seventh P site, P(7) is bonded in a 7-coordinate geometry to one Y(6), two equivalent Y(5), one Cu(11), one Cu(2), two equivalent Cu(1), and one P(13) atom. In the eighth P site, P(8) is bonded in a 7-coordinate geometry to one Y(5), two equivalent Y(6), one Cu(1), one Cu(12), two equivalent Cu(2), and two equivalent P(13) atoms. In the ninth P site, P(9) is bonded in a 7-coordinate geometry to one Y(2), two equivalent Y(1), one Cu(1), one Cu(12), two equivalent Cu(11), and two equivalent P(13) atoms. In the tenth P site, P(10) is bonded in a 7-coordinate geometry to one Y(1), two equivalent Y(2), one Cu(11), one Cu(2), two equivalent Cu(12), and one P(13) atom. In the eleventh P site, P(11) is bonded in a 7-coordinate geometry to one Y(4), two equivalent Y(3), one Cu(10), one Cu(3), and two equivalent Cu(9) atoms. In the twelfth P site, P(12) is bonded in a 7-coordinate geometry to one Y(3), two equivalent Y(4), one Cu(4), one Cu(9), and two equivalent Cu(10) atoms. In the thirteenth P site, P(13) is bonded in a 14-coordinate geometry to one Y(1), one Y(6), one Cu(11), one Cu(2), two equivalent Cu(1), two equivalent Cu(12), one P(10), one P(7), two equivalent P(8), and two equivalent P(9) atoms. In the fourteenth P site, P(14) is bonded in a 8-coordinate geometry to one Y(2), one Y(5), one Cu(1), one Cu(12), two equivalent Cu(11), and two equivalent Cu(2) atoms. In the fifteenth P site, P(15) is bonded in a 8-coordinate geometry to one Y(3), one Y(6), one Cu(4), one Cu(9), two equivalent Cu(10), and two equivalent Cu(3) atoms. In the sixteenth P site, P(16) is bonded in a 8-coordinate geometry to one Y(4), one Y(5), one Cu(10), one Cu(3), two equivalent Cu(4), and two equivalent Cu(9) atoms. is represented by the CIF file [CIF]
data_Y6Cu15P16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.104
_cell_length_b   7.157
_cell_length_c   19.601
_cell_angle_alpha   83.089
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   571.617
_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
  Y  Y0  1  0.500  0.392  0.319  1.0
  Y  Y1  1  0.000  0.894  0.317  1.0
  Y  Y2  1  0.500  0.605  0.683  1.0
  Y  Y3  1  0.000  0.111  0.682  1.0
  Y  Y4  1  0.000  1.000  0.000  1.0
  Y  Y5  1  0.500  0.500  0.001  1.0
  Cu  Cu6  1  0.000  0.634  0.101  1.0
  Cu  Cu7  1  0.500  0.134  0.101  1.0
  Cu  Cu8  1  0.000  0.366  0.899  1.0
  Cu  Cu9  1  0.500  0.866  0.899  1.0
  Cu  Cu10  1  0.000  0.520  0.429  1.0
  Cu  Cu11  1  0.500  0.029  0.423  1.0
  Cu  Cu12  1  0.000  0.483  0.578  1.0
  Cu  Cu13  1  0.500  0.970  0.571  1.0
  Cu  Cu14  1  0.500  0.240  0.784  1.0
  Cu  Cu15  1  0.000  0.741  0.782  1.0
  Cu  Cu16  1  0.500  0.759  0.217  1.0
  Cu  Cu17  1  0.000  0.261  0.217  1.0
  Cu  Cu18  1  0.000  0.845  0.480  1.0
  Cu  Cu19  1  0.500  0.618  0.518  1.0
  Cu  Cu20  1  0.000  0.187  0.521  1.0
  P  P21  1  0.500  0.304  0.587  1.0
  P  P22  1  0.000  0.802  0.598  1.0
  P  P23  1  0.500  0.703  0.403  1.0
  P  P24  1  0.000  0.196  0.406  1.0
  P  P25  1  0.500  0.194  0.915  1.0
  P  P26  1  0.000  0.695  0.914  1.0
  P  P27  1  0.500  0.805  0.086  1.0
  P  P28  1  0.000  0.305  0.087  1.0
  P  P29  1  0.000  0.587  0.234  1.0
  P  P30  1  0.500  0.089  0.232  1.0
  P  P31  1  0.000  0.412  0.767  1.0
  P  P32  1  0.500  0.914  0.766  1.0
  P  P33  1  0.500  0.456  0.162  1.0
  P  P34  1  0.000  0.956  0.159  1.0
  P  P35  1  0.500  0.546  0.842  1.0
  P  P36  1  0.000  0.041  0.839  1.0
[/CIF]
.
The compound described by Y6Cu15P16 crystallizes in the monoclinic Pm space group. There are six inequivalent Y sites. In the first Y site, Y(1) is bonded in a 13-coordinate geometry to one Cu(11), one Cu(6), two equivalent Cu(12), two equivalent Cu(5), one P(10), one P(13), one P(3), two equivalent P(4), and two equivalent P(9) atoms. In the second Y site, Y(2) is bonded in a 14-coordinate geometry to one Cu(12), one Cu(13), one Cu(5), two equivalent Cu(11), two equivalent Cu(6), one P(14), one P(4), one P(9), two equivalent P(10), and two equivalent P(3) atoms. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to one Cu(14), one Cu(8), one Cu(9), two equivalent Cu(10), two equivalent Cu(7), one P(1), one P(12), one P(15), two equivalent P(11), and two equivalent P(2) atoms. In the fourth Y site, Y(4) is bonded in a 14-coordinate geometry to one Cu(10), one Cu(15), one Cu(7), two equivalent Cu(8), two equivalent Cu(9), one P(11), one P(16), one P(2), two equivalent P(1), and two equivalent P(12) atoms. In the fifth Y site, Y(5) is bonded in a 14-coordinate geometry to one Cu(1), one Cu(3), two equivalent Cu(2), two equivalent Cu(4), one P(14), one P(16), one P(6), one P(8), two equivalent P(5), and two equivalent P(7) atoms. In the sixth Y site, Y(6) is bonded in a 14-coordinate geometry to one Cu(2), one Cu(4), two equivalent Cu(1), two equivalent Cu(3), one P(13), one P(15), one P(5), one P(7), two equivalent P(6), and two equivalent P(8) atoms. There are fifteen inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to one Y(5), two equivalent Y(6), one P(14), one P(8), one P(9), two equivalent P(13), and two equivalent P(7) atoms. In the second Cu site, Cu(2) is bonded in a 10-coordinate geometry to one Y(6), two equivalent Y(5), one P(10), one P(13), one P(7), two equivalent P(14), and two equivalent P(8) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Y(5), two equivalent Y(6), one P(11), one P(16), one P(6), two equivalent P(15), and two equivalent P(5) atoms. In the fourth Cu site, Cu(4) is bonded in a 10-coordinate geometry to one Y(6), two equivalent Y(5), one P(12), one P(15), one P(5), two equivalent P(16), and two equivalent P(6) atoms. In the fifth Cu site, Cu(5) is bonded in a 3-coordinate geometry to one Y(2), two equivalent Y(1), one P(4), and two equivalent P(3) atoms. In the sixth Cu site, Cu(6) is bonded in a 3-coordinate geometry to one Y(1), two equivalent Y(2), one P(3), and two equivalent P(4) atoms. In the seventh Cu site, Cu(7) is bonded in a distorted trigonal planar geometry to one Y(4), two equivalent Y(3), one P(2), and two equivalent P(1) atoms. In the eighth Cu site, Cu(8) is bonded in a distorted trigonal planar geometry to one Y(3), two equivalent Y(4), one P(1), and two equivalent P(2) atoms. In the ninth Cu site, Cu(9) is bonded in a 10-coordinate geometry to one Y(3), two equivalent Y(4), one P(12), one P(15), one P(5), two equivalent P(11), and two equivalent P(16) atoms. In the tenth Cu site, Cu(10) is bonded in a 10-coordinate geometry to one Y(4), two equivalent Y(3), one P(11), one P(16), one P(6), two equivalent P(12), and two equivalent P(15) atoms. In the eleventh Cu site, Cu(11) is bonded in a 10-coordinate geometry to one Y(1), two equivalent Y(2), one P(10), one P(13), one P(7), two equivalent P(14), and two equivalent P(9) atoms. In the twelfth Cu site, Cu(12) is bonded in a 10-coordinate geometry to one Y(2), two equivalent Y(1), one P(14), one P(8), one P(9), two equivalent P(10), and two equivalent P(13) atoms. In the thirteenth Cu site, Cu(13) is bonded in a distorted single-bond geometry to one Y(2), one P(2), one P(4), and two equivalent P(3) atoms. In the fourteenth Cu site, Cu(14) is bonded in a 2-coordinate geometry to one Y(3), one P(1), and one P(3) atom. In the fifteenth Cu site, Cu(15) is bonded in a 1-coordinate geometry to one Y(4), one P(4), and two equivalent P(1) atoms. There are sixteen inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(4), one Cu(14), one Cu(8), two equivalent Cu(15), and two equivalent Cu(7) atoms. In the second P site, P(2) is bonded in a 7-coordinate geometry to one Y(4), two equivalent Y(3), one Cu(13), one Cu(7), and two equivalent Cu(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to one Y(1), two equivalent Y(2), one Cu(14), one Cu(6), two equivalent Cu(13), and two equivalent Cu(5) atoms. In the fourth P site, P(4) is bonded in a 8-coordinate geometry to one Y(2), two equivalent Y(1), one Cu(13), one Cu(15), one Cu(5), and two equivalent Cu(6) atoms. In the fifth P site, P(5) is bonded in a 7-coordinate geometry to one Y(6), two equivalent Y(5), one Cu(4), one Cu(9), and two equivalent Cu(3) atoms. In the sixth P site, P(6) is bonded in a 7-coordinate geometry to one Y(5), two equivalent Y(6), one Cu(10), one Cu(3), and two equivalent Cu(4) atoms. In the seventh P site, P(7) is bonded in a 7-coordinate geometry to one Y(6), two equivalent Y(5), one Cu(11), one Cu(2), two equivalent Cu(1), and one P(13) atom. In the eighth P site, P(8) is bonded in a 7-coordinate geometry to one Y(5), two equivalent Y(6), one Cu(1), one Cu(12), two equivalent Cu(2), and two equivalent P(13) atoms. In the ninth P site, P(9) is bonded in a 7-coordinate geometry to one Y(2), two equivalent Y(1), one Cu(1), one Cu(12), two equivalent Cu(11), and two equivalent P(13) atoms. In the tenth P site, P(10) is bonded in a 7-coordinate geometry to one Y(1), two equivalent Y(2), one Cu(11), one Cu(2), two equivalent Cu(12), and one P(13) atom. In the eleventh P site, P(11) is bonded in a 7-coordinate geometry to one Y(4), two equivalent Y(3), one Cu(10), one Cu(3), and two equivalent Cu(9) atoms. In the twelfth P site, P(12) is bonded in a 7-coordinate geometry to one Y(3), two equivalent Y(4), one Cu(4), one Cu(9), and two equivalent Cu(10) atoms. In the thirteenth P site, P(13) is bonded in a 14-coordinate geometry to one Y(1), one Y(6), one Cu(11), one Cu(2), two equivalent Cu(1), two equivalent Cu(12), one P(10), one P(7), two equivalent P(8), and two equivalent P(9) atoms. In the fourteenth P site, P(14) is bonded in a 8-coordinate geometry to one Y(2), one Y(5), one Cu(1), one Cu(12), two equivalent Cu(11), and two equivalent Cu(2) atoms. In the fifteenth P site, P(15) is bonded in a 8-coordinate geometry to one Y(3), one Y(6), one Cu(4), one Cu(9), two equivalent Cu(10), and two equivalent Cu(3) atoms. In the sixteenth P site, P(16) is bonded in a 8-coordinate geometry to one Y(4), one Y(5), one Cu(10), one Cu(3), two equivalent Cu(4), and two equivalent Cu(9) atoms. is represented by the CIF file [CIF]
data_Y6Cu15P16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.104
_cell_length_b   7.157
_cell_length_c   19.601
_cell_angle_alpha   83.089
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   571.617
_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
  Y  Y0  1  0.500  0.392  0.319  1.0
  Y  Y1  1  0.000  0.894  0.317  1.0
  Y  Y2  1  0.500  0.605  0.683  1.0
  Y  Y3  1  0.000  0.111  0.682  1.0
  Y  Y4  1  0.000  1.000  0.000  1.0
  Y  Y5  1  0.500  0.500  0.001  1.0
  Cu  Cu6  1  0.000  0.634  0.101  1.0
  Cu  Cu7  1  0.500  0.134  0.101  1.0
  Cu  Cu8  1  0.000  0.366  0.899  1.0
  Cu  Cu9  1  0.500  0.866  0.899  1.0
  Cu  Cu10  1  0.000  0.520  0.429  1.0
  Cu  Cu11  1  0.500  0.029  0.423  1.0
  Cu  Cu12  1  0.000  0.483  0.578  1.0
  Cu  Cu13  1  0.500  0.970  0.571  1.0
  Cu  Cu14  1  0.500  0.240  0.784  1.0
  Cu  Cu15  1  0.000  0.741  0.782  1.0
  Cu  Cu16  1  0.500  0.759  0.217  1.0
  Cu  Cu17  1  0.000  0.261  0.217  1.0
  Cu  Cu18  1  0.000  0.845  0.480  1.0
  Cu  Cu19  1  0.500  0.618  0.518  1.0
  Cu  Cu20  1  0.000  0.187  0.521  1.0
  P  P21  1  0.500  0.304  0.587  1.0
  P  P22  1  0.000  0.802  0.598  1.0
  P  P23  1  0.500  0.703  0.403  1.0
  P  P24  1  0.000  0.196  0.406  1.0
  P  P25  1  0.500  0.194  0.915  1.0
  P  P26  1  0.000  0.695  0.914  1.0
  P  P27  1  0.500  0.805  0.086  1.0
  P  P28  1  0.000  0.305  0.087  1.0
  P  P29  1  0.000  0.587  0.234  1.0
  P  P30  1  0.500  0.089  0.232  1.0
  P  P31  1  0.000  0.412  0.767  1.0
  P  P32  1  0.500  0.914  0.766  1.0
  P  P33  1  0.500  0.456  0.162  1.0
  P  P34  1  0.000  0.956  0.159  1.0
  P  P35  1  0.500  0.546  0.842  1.0
  P  P36  1  0.000  0.041  0.839  1.0
[/CIF]
.