The compound described by Cs3EuCl6 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(3), one Cl(5), one Cl(6), two equivalent Cl(2), and two equivalent Cl(4) atoms. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to one Cl(2), one Cl(3), two equivalent Cl(1), two equivalent Cl(5), and three equivalent Cl(6) atoms. In the third Cs site, Cs(3) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(2), one Cl(5), one Cl(6), two equivalent Cl(3), and two equivalent Cl(4) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in an octahedral geometry to two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. In the second Eu site, Eu(2) is bonded in an octahedral geometry to two equivalent Cl(1), two equivalent Cl(5), and two equivalent Cl(6) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(5) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(3), two equivalent Cs(2), and one Eu(2) atom. In the second Cl site, Cl(6) is bonded in a 1-coordinate geometry to one Cs(1), one Cs(3), three equivalent Cs(2), and one Eu(2) atom. In the third Cl site, Cl(1) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(3), two equivalent Cs(2), and one Eu(2) atom. In the fourth Cl site, Cl(2) is bonded in a 5-coordinate geometry to one Cs(2), one Cs(3), two equivalent Cs(1), and one Eu(1) atom. In the fifth Cl site, Cl(3) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(2), two equivalent Cs(3), and one Eu(1) atom. In the sixth Cl site, Cl(4) is bonded in a 5-coordinate geometry to two equivalent Cs(1), two equivalent Cs(3), and one Eu(1) atom. is represented by the CIF file [CIF]
data_Cs3EuCl6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.472
_cell_length_b   14.387
_cell_length_c   13.656
_cell_angle_alpha   107.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1585.071
_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
  Cs  Cs0  1  0.432  0.686  0.736  1.0
  Cs  Cs1  1  0.568  0.314  0.264  1.0
  Cs  Cs2  1  0.932  0.314  0.764  1.0
  Cs  Cs3  1  0.068  0.686  0.236  1.0
  Cs  Cs4  1  0.968  0.901  0.639  1.0
  Cs  Cs5  1  0.032  0.099  0.361  1.0
  Cs  Cs6  1  0.468  0.099  0.861  1.0
  Cs  Cs7  1  0.532  0.901  0.139  1.0
  Cs  Cs8  1  0.935  0.679  0.887  1.0
  Cs  Cs9  1  0.065  0.321  0.113  1.0
  Cs  Cs10  1  0.435  0.321  0.613  1.0
  Cs  Cs11  1  0.565  0.679  0.387  1.0
  Eu  Eu12  1  0.000  0.500  0.500  1.0
  Eu  Eu13  1  0.500  0.500  0.000  1.0
  Eu  Eu14  1  0.000  0.000  0.000  1.0
  Eu  Eu15  1  0.500  0.000  0.500  1.0
  Cl  Cl16  1  0.494  0.886  0.624  1.0
  Cl  Cl17  1  0.506  0.114  0.376  1.0
  Cl  Cl18  1  0.994  0.114  0.876  1.0
  Cl  Cl19  1  0.006  0.886  0.124  1.0
  Cl  Cl20  1  0.302  0.647  0.994  1.0
  Cl  Cl21  1  0.698  0.353  0.006  1.0
  Cl  Cl22  1  0.802  0.353  0.506  1.0
  Cl  Cl23  1  0.198  0.647  0.494  1.0
  Cl  Cl24  1  0.795  0.644  0.603  1.0
  Cl  Cl25  1  0.205  0.356  0.397  1.0
  Cl  Cl26  1  0.295  0.356  0.897  1.0
  Cl  Cl27  1  0.705  0.644  0.103  1.0
  Cl  Cl28  1  0.636  0.499  0.818  1.0
  Cl  Cl29  1  0.364  0.501  0.182  1.0
  Cl  Cl30  1  0.136  0.501  0.682  1.0
  Cl  Cl31  1  0.864  0.499  0.318  1.0
  Cl  Cl32  1  0.180  0.871  0.856  1.0
  Cl  Cl33  1  0.820  0.129  0.144  1.0
  Cl  Cl34  1  0.680  0.129  0.644  1.0
  Cl  Cl35  1  0.320  0.871  0.356  1.0
  Cl  Cl36  1  0.733  0.907  0.904  1.0
  Cl  Cl37  1  0.267  0.093  0.096  1.0
  Cl  Cl38  1  0.233  0.093  0.596  1.0
  Cl  Cl39  1  0.767  0.907  0.404  1.0
[/CIF]
.
The compound described by Cs3EuCl6 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(3), one Cl(5), one Cl(6), two equivalent Cl(2), and two equivalent Cl(4) atoms. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to one Cl(2), one Cl(3), two equivalent Cl(1), two equivalent Cl(5), and three equivalent Cl(6) atoms. In the third Cs site, Cs(3) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(2), one Cl(5), one Cl(6), two equivalent Cl(3), and two equivalent Cl(4) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in an octahedral geometry to two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. In the second Eu site, Eu(2) is bonded in an octahedral geometry to two equivalent Cl(1), two equivalent Cl(5), and two equivalent Cl(6) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(5) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(3), two equivalent Cs(2), and one Eu(2) atom. In the second Cl site, Cl(6) is bonded in a 1-coordinate geometry to one Cs(1), one Cs(3), three equivalent Cs(2), and one Eu(2) atom. In the third Cl site, Cl(1) is bonded in a distorted single-bond geometry to one Cs(1), one Cs(3), two equivalent Cs(2), and one Eu(2) atom. In the fourth Cl site, Cl(2) is bonded in a 5-coordinate geometry to one Cs(2), one Cs(3), two equivalent Cs(1), and one Eu(1) atom. In the fifth Cl site, Cl(3) is bonded in a 5-coordinate geometry to one Cs(1), one Cs(2), two equivalent Cs(3), and one Eu(1) atom. In the sixth Cl site, Cl(4) is bonded in a 5-coordinate geometry to two equivalent Cs(1), two equivalent Cs(3), and one Eu(1) atom. is represented by the CIF file [CIF]
data_Cs3EuCl6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.472
_cell_length_b   14.387
_cell_length_c   13.656
_cell_angle_alpha   107.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1585.071
_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
  Cs  Cs0  1  0.432  0.686  0.736  1.0
  Cs  Cs1  1  0.568  0.314  0.264  1.0
  Cs  Cs2  1  0.932  0.314  0.764  1.0
  Cs  Cs3  1  0.068  0.686  0.236  1.0
  Cs  Cs4  1  0.968  0.901  0.639  1.0
  Cs  Cs5  1  0.032  0.099  0.361  1.0
  Cs  Cs6  1  0.468  0.099  0.861  1.0
  Cs  Cs7  1  0.532  0.901  0.139  1.0
  Cs  Cs8  1  0.935  0.679  0.887  1.0
  Cs  Cs9  1  0.065  0.321  0.113  1.0
  Cs  Cs10  1  0.435  0.321  0.613  1.0
  Cs  Cs11  1  0.565  0.679  0.387  1.0
  Eu  Eu12  1  0.000  0.500  0.500  1.0
  Eu  Eu13  1  0.500  0.500  0.000  1.0
  Eu  Eu14  1  0.000  0.000  0.000  1.0
  Eu  Eu15  1  0.500  0.000  0.500  1.0
  Cl  Cl16  1  0.494  0.886  0.624  1.0
  Cl  Cl17  1  0.506  0.114  0.376  1.0
  Cl  Cl18  1  0.994  0.114  0.876  1.0
  Cl  Cl19  1  0.006  0.886  0.124  1.0
  Cl  Cl20  1  0.302  0.647  0.994  1.0
  Cl  Cl21  1  0.698  0.353  0.006  1.0
  Cl  Cl22  1  0.802  0.353  0.506  1.0
  Cl  Cl23  1  0.198  0.647  0.494  1.0
  Cl  Cl24  1  0.795  0.644  0.603  1.0
  Cl  Cl25  1  0.205  0.356  0.397  1.0
  Cl  Cl26  1  0.295  0.356  0.897  1.0
  Cl  Cl27  1  0.705  0.644  0.103  1.0
  Cl  Cl28  1  0.636  0.499  0.818  1.0
  Cl  Cl29  1  0.364  0.501  0.182  1.0
  Cl  Cl30  1  0.136  0.501  0.682  1.0
  Cl  Cl31  1  0.864  0.499  0.318  1.0
  Cl  Cl32  1  0.180  0.871  0.856  1.0
  Cl  Cl33  1  0.820  0.129  0.144  1.0
  Cl  Cl34  1  0.680  0.129  0.644  1.0
  Cl  Cl35  1  0.320  0.871  0.356  1.0
  Cl  Cl36  1  0.733  0.907  0.904  1.0
  Cl  Cl37  1  0.267  0.093  0.096  1.0
  Cl  Cl38  1  0.233  0.093  0.596  1.0
  Cl  Cl39  1  0.767  0.907  0.404  1.0
[/CIF]
.