The structure described by Pr3CuSnSe7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 9-coordinate geometry to one Cu(1), one Se(2), three equivalent Se(1), and four equivalent Se(3) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Pr(1) and three equivalent Se(3) atoms. Sn(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to three equivalent Pr(1) and one Sn(1) atom. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr3CuSnSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.708
_cell_length_b   10.708
_cell_length_c   6.365
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   632.070
_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
  Pr  Pr0  1  0.645  0.864  0.964  1.0
  Pr  Pr1  1  0.780  0.645  0.464  1.0
  Pr  Pr2  1  0.864  0.220  0.464  1.0
  Pr  Pr3  1  0.136  0.780  0.964  1.0
  Pr  Pr4  1  0.220  0.355  0.964  1.0
  Pr  Pr5  1  0.355  0.136  0.464  1.0
  Cu  Cu6  1  0.000  0.000  0.509  1.0
  Cu  Cu7  1  0.000  0.000  0.009  1.0
  Sn  Sn8  1  0.667  0.333  0.886  1.0
  Sn  Sn9  1  0.333  0.667  0.386  1.0
  Se  Se10  1  0.487  0.572  0.213  1.0
  Se  Se11  1  0.915  0.487  0.713  1.0
  Se  Se12  1  0.572  0.085  0.713  1.0
  Se  Se13  1  0.428  0.915  0.213  1.0
  Se  Se14  1  0.333  0.667  0.783  1.0
  Se  Se15  1  0.667  0.333  0.283  1.0
  Se  Se16  1  0.085  0.513  0.213  1.0
  Se  Se17  1  0.513  0.428  0.713  1.0
  Se  Se18  1  0.256  0.100  0.996  1.0
  Se  Se19  1  0.156  0.256  0.496  1.0
  Se  Se20  1  0.100  0.844  0.496  1.0
  Se  Se21  1  0.900  0.156  0.996  1.0
  Se  Se22  1  0.844  0.744  0.996  1.0
  Se  Se23  1  0.744  0.900  0.496  1.0
[/CIF]
.
The structure described by Pr3CuSnSe7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 9-coordinate geometry to one Cu(1), one Se(2), three equivalent Se(1), and four equivalent Se(3) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Pr(1) and three equivalent Se(3) atoms. Sn(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to three equivalent Pr(1) and one Sn(1) atom. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr3CuSnSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.708
_cell_length_b   10.708
_cell_length_c   6.365
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   632.070
_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
  Pr  Pr0  1  0.645  0.864  0.964  1.0
  Pr  Pr1  1  0.780  0.645  0.464  1.0
  Pr  Pr2  1  0.864  0.220  0.464  1.0
  Pr  Pr3  1  0.136  0.780  0.964  1.0
  Pr  Pr4  1  0.220  0.355  0.964  1.0
  Pr  Pr5  1  0.355  0.136  0.464  1.0
  Cu  Cu6  1  0.000  0.000  0.509  1.0
  Cu  Cu7  1  0.000  0.000  0.009  1.0
  Sn  Sn8  1  0.667  0.333  0.886  1.0
  Sn  Sn9  1  0.333  0.667  0.386  1.0
  Se  Se10  1  0.487  0.572  0.213  1.0
  Se  Se11  1  0.915  0.487  0.713  1.0
  Se  Se12  1  0.572  0.085  0.713  1.0
  Se  Se13  1  0.428  0.915  0.213  1.0
  Se  Se14  1  0.333  0.667  0.783  1.0
  Se  Se15  1  0.667  0.333  0.283  1.0
  Se  Se16  1  0.085  0.513  0.213  1.0
  Se  Se17  1  0.513  0.428  0.713  1.0
  Se  Se18  1  0.256  0.100  0.996  1.0
  Se  Se19  1  0.156  0.256  0.496  1.0
  Se  Se20  1  0.100  0.844  0.496  1.0
  Se  Se21  1  0.900  0.156  0.996  1.0
  Se  Se22  1  0.844  0.744  0.996  1.0
  Se  Se23  1  0.744  0.900  0.496  1.0
[/CIF]
.