The material described by K2(ReSe2)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent Se(3), two equivalent Se(4), and two equivalent Se(6) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(4), two equivalent Se(5), and two equivalent Se(6) atoms. In the third K site, K(3) is bonded in a 7-coordinate geometry to one Se(3), one Se(4), one Se(6), two equivalent Se(2), and two equivalent Se(5) atoms. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(5) atom to form distorted edge-sharing ReSe5 square pyramids. In the second Re site, Re(2) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(6) atom to form a mixture of distorted corner and edge-sharing ReSe5 square pyramids. In the third Re site, Re(3) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(6) atom to form a mixture of distorted corner and edge-sharing ReSe5 square pyramids. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one K(2), one Re(1), one Re(2), and one Re(3) atom. In the second Se site, Se(2) is bonded to two equivalent K(3), one Re(1), one Re(2), and one Re(3) atom to form distorted SeK2Re3 trigonal bipyramids that share corners with two equivalent Se(6)K3Re2 trigonal bipyramids,  an edgeedge with one Se(2)K2Re3 trigonal bipyramid, and  an edgeedge with one Se(6)K3Re2 trigonal bipyramid. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to one K(1), one K(3), one Re(1), one Re(2), and one Re(3) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one Re(1), one Re(2), and one Re(3) atom. In the fifth Se site, Se(5) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(3), one Re(1), and one Se(5) atom. In the sixth Se site, Se(6) is bonded to one K(1), one K(2), one K(3), one Re(2), and one Re(3) atom to form distorted SeK3Re2 trigonal bipyramids that share corners with two equivalent Se(2)K2Re3 trigonal bipyramids,  an edgeedge with one Se(2)K2Re3 trigonal bipyramid, and  an edgeedge with one Se(6)K3Re2 trigonal bipyramid. is represented by the CIF file [CIF]
data_K2(ReSe2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.042
_cell_length_b   10.042
_cell_length_c   12.413
_cell_angle_alpha   88.715
_cell_angle_beta   88.715
_cell_angle_gamma   60.821
_symmetry_Int_Tables_number   1
_cell_volume   1092.566
_cell_formula_units_Z   4
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
  K  K0  1  0.603  0.397  0.750  1.0
  K  K1  1  0.397  0.603  0.250  1.0
  K  K2  1  0.217  0.783  0.750  1.0
  K  K3  1  0.783  0.217  0.250  1.0
  K  K4  1  0.123  0.648  0.017  1.0
  K  K5  1  0.352  0.877  0.483  1.0
  K  K6  1  0.877  0.352  0.983  1.0
  K  K7  1  0.648  0.123  0.517  1.0
  Re  Re8  1  0.003  0.315  0.526  1.0
  Re  Re9  1  0.685  0.997  0.974  1.0
  Re  Re10  1  0.997  0.685  0.474  1.0
  Re  Re11  1  0.315  0.003  0.026  1.0
  Re  Re12  1  0.113  0.470  0.626  1.0
  Re  Re13  1  0.530  0.887  0.874  1.0
  Re  Re14  1  0.887  0.530  0.374  1.0
  Re  Re15  1  0.470  0.113  0.126  1.0
  Re  Re16  1  0.818  0.601  0.581  1.0
  Re  Re17  1  0.399  0.182  0.919  1.0
  Re  Re18  1  0.182  0.399  0.419  1.0
  Re  Re19  1  0.601  0.818  0.081  1.0
  Se  Se20  1  0.072  0.253  0.330  1.0
  Se  Se21  1  0.747  0.928  0.170  1.0
  Se  Se22  1  0.928  0.747  0.670  1.0
  Se  Se23  1  0.253  0.072  0.830  1.0
  Se  Se24  1  0.800  0.714  0.931  1.0
  Se  Se25  1  0.286  0.200  0.569  1.0
  Se  Se26  1  0.200  0.286  0.069  1.0
  Se  Se27  1  0.714  0.800  0.431  1.0
  Se  Se28  1  0.061  0.611  0.278  1.0
  Se  Se29  1  0.389  0.939  0.222  1.0
  Se  Se30  1  0.939  0.389  0.722  1.0
  Se  Se31  1  0.611  0.061  0.778  1.0
  Se  Se32  1  0.282  0.553  0.519  1.0
  Se  Se33  1  0.447  0.718  0.981  1.0
  Se  Se34  1  0.718  0.447  0.481  1.0
  Se  Se35  1  0.553  0.282  0.019  1.0
  Se  Se36  1  0.067  0.996  0.081  1.0
  Se  Se37  1  0.004  0.933  0.419  1.0
  Se  Se38  1  0.933  0.004  0.919  1.0
  Se  Se39  1  0.996  0.067  0.581  1.0
  Se  Se40  1  0.265  0.439  0.804  1.0
  Se  Se41  1  0.561  0.735  0.696  1.0
  Se  Se42  1  0.735  0.561  0.196  1.0
  Se  Se43  1  0.439  0.265  0.304  1.0
[/CIF]
.
The material described by K2(ReSe2)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent Se(3), two equivalent Se(4), and two equivalent Se(6) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(4), two equivalent Se(5), and two equivalent Se(6) atoms. In the third K site, K(3) is bonded in a 7-coordinate geometry to one Se(3), one Se(4), one Se(6), two equivalent Se(2), and two equivalent Se(5) atoms. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(5) atom to form distorted edge-sharing ReSe5 square pyramids. In the second Re site, Re(2) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(6) atom to form a mixture of distorted corner and edge-sharing ReSe5 square pyramids. In the third Re site, Re(3) is bonded to one Se(1), one Se(2), one Se(3), one Se(4), and one Se(6) atom to form a mixture of distorted corner and edge-sharing ReSe5 square pyramids. There are six inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one K(2), one Re(1), one Re(2), and one Re(3) atom. In the second Se site, Se(2) is bonded to two equivalent K(3), one Re(1), one Re(2), and one Re(3) atom to form distorted SeK2Re3 trigonal bipyramids that share corners with two equivalent Se(6)K3Re2 trigonal bipyramids,  an edgeedge with one Se(2)K2Re3 trigonal bipyramid, and  an edgeedge with one Se(6)K3Re2 trigonal bipyramid. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to one K(1), one K(3), one Re(1), one Re(2), and one Re(3) atom. In the fourth Se site, Se(4) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one Re(1), one Re(2), and one Re(3) atom. In the fifth Se site, Se(5) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(3), one Re(1), and one Se(5) atom. In the sixth Se site, Se(6) is bonded to one K(1), one K(2), one K(3), one Re(2), and one Re(3) atom to form distorted SeK3Re2 trigonal bipyramids that share corners with two equivalent Se(2)K2Re3 trigonal bipyramids,  an edgeedge with one Se(2)K2Re3 trigonal bipyramid, and  an edgeedge with one Se(6)K3Re2 trigonal bipyramid. is represented by the CIF file [CIF]
data_K2(ReSe2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.042
_cell_length_b   10.042
_cell_length_c   12.413
_cell_angle_alpha   88.715
_cell_angle_beta   88.715
_cell_angle_gamma   60.821
_symmetry_Int_Tables_number   1
_cell_volume   1092.566
_cell_formula_units_Z   4
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
  K  K0  1  0.603  0.397  0.750  1.0
  K  K1  1  0.397  0.603  0.250  1.0
  K  K2  1  0.217  0.783  0.750  1.0
  K  K3  1  0.783  0.217  0.250  1.0
  K  K4  1  0.123  0.648  0.017  1.0
  K  K5  1  0.352  0.877  0.483  1.0
  K  K6  1  0.877  0.352  0.983  1.0
  K  K7  1  0.648  0.123  0.517  1.0
  Re  Re8  1  0.003  0.315  0.526  1.0
  Re  Re9  1  0.685  0.997  0.974  1.0
  Re  Re10  1  0.997  0.685  0.474  1.0
  Re  Re11  1  0.315  0.003  0.026  1.0
  Re  Re12  1  0.113  0.470  0.626  1.0
  Re  Re13  1  0.530  0.887  0.874  1.0
  Re  Re14  1  0.887  0.530  0.374  1.0
  Re  Re15  1  0.470  0.113  0.126  1.0
  Re  Re16  1  0.818  0.601  0.581  1.0
  Re  Re17  1  0.399  0.182  0.919  1.0
  Re  Re18  1  0.182  0.399  0.419  1.0
  Re  Re19  1  0.601  0.818  0.081  1.0
  Se  Se20  1  0.072  0.253  0.330  1.0
  Se  Se21  1  0.747  0.928  0.170  1.0
  Se  Se22  1  0.928  0.747  0.670  1.0
  Se  Se23  1  0.253  0.072  0.830  1.0
  Se  Se24  1  0.800  0.714  0.931  1.0
  Se  Se25  1  0.286  0.200  0.569  1.0
  Se  Se26  1  0.200  0.286  0.069  1.0
  Se  Se27  1  0.714  0.800  0.431  1.0
  Se  Se28  1  0.061  0.611  0.278  1.0
  Se  Se29  1  0.389  0.939  0.222  1.0
  Se  Se30  1  0.939  0.389  0.722  1.0
  Se  Se31  1  0.611  0.061  0.778  1.0
  Se  Se32  1  0.282  0.553  0.519  1.0
  Se  Se33  1  0.447  0.718  0.981  1.0
  Se  Se34  1  0.718  0.447  0.481  1.0
  Se  Se35  1  0.553  0.282  0.019  1.0
  Se  Se36  1  0.067  0.996  0.081  1.0
  Se  Se37  1  0.004  0.933  0.419  1.0
  Se  Se38  1  0.933  0.004  0.919  1.0
  Se  Se39  1  0.996  0.067  0.581  1.0
  Se  Se40  1  0.265  0.439  0.804  1.0
  Se  Se41  1  0.561  0.735  0.696  1.0
  Se  Se42  1  0.735  0.561  0.196  1.0
  Se  Se43  1  0.439  0.265  0.304  1.0
[/CIF]
.