The compound described by Eu4O3F7 crystallizes in the monoclinic P2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted q6 geometry to one O(1), one O(2), one O(3), one F(1), one F(2), one F(4), one F(5), and two equivalent F(3) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one F(1), one F(2), one F(3), one F(5), and two equivalent F(4) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent F(2)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, edges with two equivalent O(3)Eu4 tetrahedra, and edges with two equivalent F(1)Eu4 tetrahedra. In the second O site, O(2) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, edges with two equivalent F(2)Eu4 tetrahedra, and edges with two equivalent F(5)Eu4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent O(2)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, corners with four equivalent F(2)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, and edges with two equivalent F(5)Eu4 tetrahedra. There are five inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(2)Eu4 tetrahedra, corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, and edges with two equivalent F(2)Eu4 tetrahedra. In the second F site, F(2) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(1)Eu4 tetrahedra, corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, and edges with two equivalent F(1)Eu4 tetrahedra. In the third F site, F(3) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fourth F site, F(4) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the fifth F site, F(5) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(1)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, corners with four equivalent F(2)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, and edges with two equivalent O(3)Eu4 tetrahedra. is represented by the CIF card [CIF]
data_Eu4O3F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.544
_cell_length_b   5.881
_cell_length_c   5.725
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.224
_symmetry_Int_Tables_number   1
_cell_volume   186.629
_cell_formula_units_Z   1
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  0.026  0.247  0.278  1.0
  Eu  Eu1  1  0.984  0.750  0.796  1.0
  Eu  Eu2  1  0.516  0.250  0.796  1.0
  Eu  Eu3  1  0.474  0.753  0.278  1.0
  O  O4  1  0.250  0.000  0.044  1.0
  O  O5  1  0.750  0.000  0.022  1.0
  O  O6  1  0.250  0.500  0.994  1.0
  F  F7  1  0.250  0.000  0.566  1.0
  F  F8  1  0.750  0.000  0.490  1.0
  F  F9  1  0.428  0.355  0.399  1.0
  F  F10  1  0.072  0.645  0.399  1.0
  F  F11  1  0.575  0.654  0.685  1.0
  F  F12  1  0.925  0.346  0.685  1.0
  F  F13  1  0.750  0.500  0.086  1.0
[/CIF]
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The compound described by Eu4O3F7 crystallizes in the monoclinic P2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted q6 geometry to one O(1), one O(2), one O(3), one F(1), one F(2), one F(4), one F(5), and two equivalent F(3) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one F(1), one F(2), one F(3), one F(5), and two equivalent F(4) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent F(2)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, edges with two equivalent O(3)Eu4 tetrahedra, and edges with two equivalent F(1)Eu4 tetrahedra. In the second O site, O(2) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, edges with two equivalent F(2)Eu4 tetrahedra, and edges with two equivalent F(5)Eu4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with four equivalent O(2)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, corners with four equivalent F(2)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, and edges with two equivalent F(5)Eu4 tetrahedra. There are five inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(2)Eu4 tetrahedra, corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(1)Eu4 tetrahedra, and edges with two equivalent F(2)Eu4 tetrahedra. In the second F site, F(2) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(1)Eu4 tetrahedra, corners with four equivalent O(3)Eu4 tetrahedra, corners with four equivalent F(5)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, and edges with two equivalent F(1)Eu4 tetrahedra. In the third F site, F(3) is bonded in a trigonal non-coplanar geometry to one Eu(2) and two equivalent Eu(1) atoms. In the fourth F site, F(4) is bonded in a trigonal non-coplanar geometry to one Eu(1) and two equivalent Eu(2) atoms. In the fifth F site, F(5) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form FEu4 tetrahedra that share corners with four equivalent O(1)Eu4 tetrahedra, corners with four equivalent F(1)Eu4 tetrahedra, corners with four equivalent F(2)Eu4 tetrahedra, edges with two equivalent O(2)Eu4 tetrahedra, and edges with two equivalent O(3)Eu4 tetrahedra. is represented by the CIF card [CIF]
data_Eu4O3F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.544
_cell_length_b   5.881
_cell_length_c   5.725
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.224
_symmetry_Int_Tables_number   1
_cell_volume   186.629
_cell_formula_units_Z   1
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  0.026  0.247  0.278  1.0
  Eu  Eu1  1  0.984  0.750  0.796  1.0
  Eu  Eu2  1  0.516  0.250  0.796  1.0
  Eu  Eu3  1  0.474  0.753  0.278  1.0
  O  O4  1  0.250  0.000  0.044  1.0
  O  O5  1  0.750  0.000  0.022  1.0
  O  O6  1  0.250  0.500  0.994  1.0
  F  F7  1  0.250  0.000  0.566  1.0
  F  F8  1  0.750  0.000  0.490  1.0
  F  F9  1  0.428  0.355  0.399  1.0
  F  F10  1  0.072  0.645  0.399  1.0
  F  F11  1  0.575  0.654  0.685  1.0
  F  F12  1  0.925  0.346  0.685  1.0
  F  F13  1  0.750  0.500  0.086  1.0
[/CIF]
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