The structure described by Ce3CuSnSe7 crystallizes in the hexagonal P6_3 space group. Ce(1) is bonded in a 9-coordinate geometry to one Cu(1), one Se(1), three equivalent Se(3), and four equivalent Se(2) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Ce(1) and three equivalent Se(2) atoms. Sn(1) is bonded in a tetrahedral geometry to one Se(1) and three equivalent Se(3) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to three equivalent Ce(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Ce(1) and one Cu(1) atom. In the third Se site, Se(3) is bonded in a rectangular see-saw-like geometry to three equivalent Ce(1) and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce3CuSnSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.619
_cell_length_b   10.619
_cell_length_c   6.368
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   621.884
_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
  Ce  Ce0  1  0.137  0.358  0.754  1.0
  Ce  Ce1  1  0.779  0.137  0.254  1.0
  Ce  Ce2  1  0.358  0.221  0.254  1.0
  Ce  Ce3  1  0.642  0.779  0.754  1.0
  Ce  Ce4  1  0.221  0.863  0.754  1.0
  Ce  Ce5  1  0.863  0.642  0.254  1.0
  Cu  Cu6  1  0.000  0.000  0.714  1.0
  Cu  Cu7  1  0.000  0.000  0.214  1.0
  Sn  Sn8  1  0.333  0.667  0.331  1.0
  Sn  Sn9  1  0.667  0.333  0.831  1.0
  Se  Se10  1  0.333  0.667  0.928  1.0
  Se  Se11  1  0.667  0.333  0.428  1.0
  Se  Se12  1  0.844  0.100  0.729  1.0
  Se  Se13  1  0.744  0.844  0.229  1.0
  Se  Se14  1  0.100  0.256  0.229  1.0
  Se  Se15  1  0.900  0.744  0.729  1.0
  Se  Se16  1  0.256  0.156  0.729  1.0
  Se  Se17  1  0.156  0.900  0.229  1.0
  Se  Se18  1  0.489  0.920  0.507  1.0
  Se  Se19  1  0.569  0.489  0.007  1.0
  Se  Se20  1  0.920  0.431  0.007  1.0
  Se  Se21  1  0.080  0.569  0.507  1.0
  Se  Se22  1  0.431  0.511  0.507  1.0
  Se  Se23  1  0.511  0.080  0.007  1.0
[/CIF]
.
The structure described by Ce3CuSnSe7 crystallizes in the hexagonal P6_3 space group. Ce(1) is bonded in a 9-coordinate geometry to one Cu(1), one Se(1), three equivalent Se(3), and four equivalent Se(2) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Ce(1) and three equivalent Se(2) atoms. Sn(1) is bonded in a tetrahedral geometry to one Se(1) and three equivalent Se(3) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to three equivalent Ce(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Ce(1) and one Cu(1) atom. In the third Se site, Se(3) is bonded in a rectangular see-saw-like geometry to three equivalent Ce(1) and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce3CuSnSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.619
_cell_length_b   10.619
_cell_length_c   6.368
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   621.884
_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
  Ce  Ce0  1  0.137  0.358  0.754  1.0
  Ce  Ce1  1  0.779  0.137  0.254  1.0
  Ce  Ce2  1  0.358  0.221  0.254  1.0
  Ce  Ce3  1  0.642  0.779  0.754  1.0
  Ce  Ce4  1  0.221  0.863  0.754  1.0
  Ce  Ce5  1  0.863  0.642  0.254  1.0
  Cu  Cu6  1  0.000  0.000  0.714  1.0
  Cu  Cu7  1  0.000  0.000  0.214  1.0
  Sn  Sn8  1  0.333  0.667  0.331  1.0
  Sn  Sn9  1  0.667  0.333  0.831  1.0
  Se  Se10  1  0.333  0.667  0.928  1.0
  Se  Se11  1  0.667  0.333  0.428  1.0
  Se  Se12  1  0.844  0.100  0.729  1.0
  Se  Se13  1  0.744  0.844  0.229  1.0
  Se  Se14  1  0.100  0.256  0.229  1.0
  Se  Se15  1  0.900  0.744  0.729  1.0
  Se  Se16  1  0.256  0.156  0.729  1.0
  Se  Se17  1  0.156  0.900  0.229  1.0
  Se  Se18  1  0.489  0.920  0.507  1.0
  Se  Se19  1  0.569  0.489  0.007  1.0
  Se  Se20  1  0.920  0.431  0.007  1.0
  Se  Se21  1  0.080  0.569  0.507  1.0
  Se  Se22  1  0.431  0.511  0.507  1.0
  Se  Se23  1  0.511  0.080  0.007  1.0
[/CIF]
.