The structure described by Eu4OCl6 crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent Cl(2), and four equivalent Cl(1) atoms. In the second Eu site, Eu(2) is bonded in a 1-coordinate geometry to one O(1), three equivalent Cl(1), and three equivalent Cl(2) atoms. O(1) is bonded to one Eu(2) and three equivalent Eu(1) atoms to form OEu4 tetrahedra that share corners with six equivalent Cl(2)Eu4 trigonal pyramids and edges with three equivalent Cl(2)Eu4 trigonal pyramids. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to one Eu(2) and four equivalent Eu(1) atoms. In the second Cl site, Cl(2) is bonded to one Eu(2) and three equivalent Eu(1) atoms to form distorted ClEu4 trigonal pyramids that share corners with two equivalent O(1)Eu4 tetrahedra, corners with eight equivalent Cl(2)Eu4 trigonal pyramids, and  an edgeedge with one O(1)Eu4 tetrahedra. is represented by the CIF card [CIF]
data_Eu4Cl6O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.418
_cell_length_b   9.419
_cell_length_c   7.142
_cell_angle_alpha   89.983
_cell_angle_beta   90.027
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   548.667
_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
  Eu  Eu0  1  0.803  0.197  0.500  1.0
  Eu  Eu1  1  0.607  0.803  0.000  1.0
  Eu  Eu2  1  0.197  0.393  0.000  1.0
  Eu  Eu3  1  0.803  0.607  0.500  1.0
  Eu  Eu4  1  0.393  0.196  0.500  1.0
  Eu  Eu5  1  0.197  0.804  0.000  1.0
  Eu  Eu6  1  0.667  0.333  0.933  1.0
  Eu  Eu7  1  0.333  0.667  0.433  1.0
  Cl  Cl8  1  0.467  0.933  0.715  1.0
  Cl  Cl9  1  0.533  0.067  0.215  1.0
  Cl  Cl10  1  0.933  0.467  0.215  1.0
  Cl  Cl11  1  0.467  0.533  0.715  1.0
  Cl  Cl12  1  0.858  0.142  0.892  1.0
  Cl  Cl13  1  0.716  0.858  0.392  1.0
  Cl  Cl14  1  0.533  0.466  0.215  1.0
  Cl  Cl15  1  0.067  0.534  0.715  1.0
  Cl  Cl16  1  0.142  0.858  0.392  1.0
  Cl  Cl17  1  0.284  0.142  0.892  1.0
  Cl  Cl18  1  0.858  0.716  0.892  1.0
  Cl  Cl19  1  0.142  0.284  0.392  1.0
  O  O20  1  0.333  0.667  0.106  1.0
  O  O21  1  0.667  0.333  0.606  1.0
[/CIF]
.
The structure described by Eu4OCl6 crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent Cl(2), and four equivalent Cl(1) atoms. In the second Eu site, Eu(2) is bonded in a 1-coordinate geometry to one O(1), three equivalent Cl(1), and three equivalent Cl(2) atoms. O(1) is bonded to one Eu(2) and three equivalent Eu(1) atoms to form OEu4 tetrahedra that share corners with six equivalent Cl(2)Eu4 trigonal pyramids and edges with three equivalent Cl(2)Eu4 trigonal pyramids. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to one Eu(2) and four equivalent Eu(1) atoms. In the second Cl site, Cl(2) is bonded to one Eu(2) and three equivalent Eu(1) atoms to form distorted ClEu4 trigonal pyramids that share corners with two equivalent O(1)Eu4 tetrahedra, corners with eight equivalent Cl(2)Eu4 trigonal pyramids, and  an edgeedge with one O(1)Eu4 tetrahedra. is represented by the CIF card [CIF]
data_Eu4Cl6O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.418
_cell_length_b   9.419
_cell_length_c   7.142
_cell_angle_alpha   89.983
_cell_angle_beta   90.027
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   548.667
_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
  Eu  Eu0  1  0.803  0.197  0.500  1.0
  Eu  Eu1  1  0.607  0.803  0.000  1.0
  Eu  Eu2  1  0.197  0.393  0.000  1.0
  Eu  Eu3  1  0.803  0.607  0.500  1.0
  Eu  Eu4  1  0.393  0.196  0.500  1.0
  Eu  Eu5  1  0.197  0.804  0.000  1.0
  Eu  Eu6  1  0.667  0.333  0.933  1.0
  Eu  Eu7  1  0.333  0.667  0.433  1.0
  Cl  Cl8  1  0.467  0.933  0.715  1.0
  Cl  Cl9  1  0.533  0.067  0.215  1.0
  Cl  Cl10  1  0.933  0.467  0.215  1.0
  Cl  Cl11  1  0.467  0.533  0.715  1.0
  Cl  Cl12  1  0.858  0.142  0.892  1.0
  Cl  Cl13  1  0.716  0.858  0.392  1.0
  Cl  Cl14  1  0.533  0.466  0.215  1.0
  Cl  Cl15  1  0.067  0.534  0.715  1.0
  Cl  Cl16  1  0.142  0.858  0.392  1.0
  Cl  Cl17  1  0.284  0.142  0.892  1.0
  Cl  Cl18  1  0.858  0.716  0.892  1.0
  Cl  Cl19  1  0.142  0.284  0.392  1.0
  O  O20  1  0.333  0.667  0.106  1.0
  O  O21  1  0.667  0.333  0.606  1.0
[/CIF]
.