The material structure described by Eu4B4O11F2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), two equivalent O(5), two equivalent O(6), and one F(1) atom. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(5), one O(6), two equivalent O(2), and three equivalent F(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one B(1), and one B(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Eu(1), two equivalent Eu(2), and one B(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Eu(1) and two equivalent B(1) atoms. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(1) atom. F(1) is bonded to one Eu(1) and three equivalent Eu(2) atoms to form a mixture of distorted corner and edge-sharing FEu4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu4B4O11F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.385
_cell_length_b   7.385
_cell_length_c   13.945
_cell_angle_alpha   89.112
_cell_angle_beta   89.112
_cell_angle_gamma   37.387
_symmetry_Int_Tables_number   1
_cell_volume   461.714
_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  0.456  0.422  0.372  1.0
  Eu  Eu1  1  0.578  0.544  0.128  1.0
  Eu  Eu2  1  0.544  0.578  0.628  1.0
  Eu  Eu3  1  0.422  0.456  0.872  1.0
  Eu  Eu4  1  0.739  0.705  0.373  1.0
  Eu  Eu5  1  0.295  0.261  0.127  1.0
  Eu  Eu6  1  0.261  0.295  0.627  1.0
  Eu  Eu7  1  0.705  0.739  0.873  1.0
  B  B8  1  0.064  0.118  0.288  1.0
  B  B9  1  0.882  0.936  0.212  1.0
  B  B10  1  0.936  0.882  0.712  1.0
  B  B11  1  0.118  0.064  0.788  1.0
  B  B12  1  0.861  0.949  0.526  1.0
  B  B13  1  0.051  0.139  0.974  1.0
  B  B14  1  0.139  0.051  0.474  1.0
  B  B15  1  0.949  0.861  0.026  1.0
  O  O16  1  0.959  0.217  0.393  1.0
  O  O17  1  0.783  0.041  0.107  1.0
  O  O18  1  0.041  0.783  0.607  1.0
  O  O19  1  0.217  0.959  0.893  1.0
  O  O20  1  0.650  0.008  0.257  1.0
  O  O21  1  0.992  0.350  0.243  1.0
  O  O22  1  0.350  0.992  0.743  1.0
  O  O23  1  0.008  0.650  0.757  1.0
  O  O24  1  0.592  0.251  0.535  1.0
  O  O25  1  0.749  0.408  0.965  1.0
  O  O26  1  0.408  0.749  0.465  1.0
  O  O27  1  0.251  0.592  0.035  1.0
  O  O28  1  0.850  0.150  0.250  1.0
  O  O29  1  0.150  0.850  0.750  1.0
  O  O30  1  0.947  0.827  0.437  1.0
  O  O31  1  0.173  0.053  0.063  1.0
  O  O32  1  0.053  0.173  0.563  1.0
  O  O33  1  0.827  0.947  0.937  1.0
  O  O34  1  0.372  0.826  0.276  1.0
  O  O35  1  0.174  0.628  0.224  1.0
  O  O36  1  0.628  0.174  0.724  1.0
  O  O37  1  0.826  0.372  0.776  1.0
  F  F38  1  0.294  0.245  0.425  1.0
  F  F39  1  0.755  0.706  0.075  1.0
  F  F40  1  0.706  0.755  0.575  1.0
  F  F41  1  0.245  0.294  0.925  1.0
[/CIF]
.
The material structure described by Eu4B4O11F2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), two equivalent O(5), two equivalent O(6), and one F(1) atom. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(5), one O(6), two equivalent O(2), and three equivalent F(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one B(1), and one B(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Eu(1), two equivalent Eu(2), and one B(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Eu(1) and two equivalent B(1) atoms. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Eu(2), two equivalent Eu(1), and one B(1) atom. F(1) is bonded to one Eu(1) and three equivalent Eu(2) atoms to form a mixture of distorted corner and edge-sharing FEu4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu4B4O11F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.385
_cell_length_b   7.385
_cell_length_c   13.945
_cell_angle_alpha   89.112
_cell_angle_beta   89.112
_cell_angle_gamma   37.387
_symmetry_Int_Tables_number   1
_cell_volume   461.714
_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  0.456  0.422  0.372  1.0
  Eu  Eu1  1  0.578  0.544  0.128  1.0
  Eu  Eu2  1  0.544  0.578  0.628  1.0
  Eu  Eu3  1  0.422  0.456  0.872  1.0
  Eu  Eu4  1  0.739  0.705  0.373  1.0
  Eu  Eu5  1  0.295  0.261  0.127  1.0
  Eu  Eu6  1  0.261  0.295  0.627  1.0
  Eu  Eu7  1  0.705  0.739  0.873  1.0
  B  B8  1  0.064  0.118  0.288  1.0
  B  B9  1  0.882  0.936  0.212  1.0
  B  B10  1  0.936  0.882  0.712  1.0
  B  B11  1  0.118  0.064  0.788  1.0
  B  B12  1  0.861  0.949  0.526  1.0
  B  B13  1  0.051  0.139  0.974  1.0
  B  B14  1  0.139  0.051  0.474  1.0
  B  B15  1  0.949  0.861  0.026  1.0
  O  O16  1  0.959  0.217  0.393  1.0
  O  O17  1  0.783  0.041  0.107  1.0
  O  O18  1  0.041  0.783  0.607  1.0
  O  O19  1  0.217  0.959  0.893  1.0
  O  O20  1  0.650  0.008  0.257  1.0
  O  O21  1  0.992  0.350  0.243  1.0
  O  O22  1  0.350  0.992  0.743  1.0
  O  O23  1  0.008  0.650  0.757  1.0
  O  O24  1  0.592  0.251  0.535  1.0
  O  O25  1  0.749  0.408  0.965  1.0
  O  O26  1  0.408  0.749  0.465  1.0
  O  O27  1  0.251  0.592  0.035  1.0
  O  O28  1  0.850  0.150  0.250  1.0
  O  O29  1  0.150  0.850  0.750  1.0
  O  O30  1  0.947  0.827  0.437  1.0
  O  O31  1  0.173  0.053  0.063  1.0
  O  O32  1  0.053  0.173  0.563  1.0
  O  O33  1  0.827  0.947  0.937  1.0
  O  O34  1  0.372  0.826  0.276  1.0
  O  O35  1  0.174  0.628  0.224  1.0
  O  O36  1  0.628  0.174  0.724  1.0
  O  O37  1  0.826  0.372  0.776  1.0
  F  F38  1  0.294  0.245  0.425  1.0
  F  F39  1  0.755  0.706  0.075  1.0
  F  F40  1  0.706  0.755  0.575  1.0
  F  F41  1  0.245  0.294  0.925  1.0
[/CIF]
.