The crystal structure described by La3O2F5 crystallizes in the triclinic P1 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), one F(1), two equivalent F(10), two equivalent F(4), and two equivalent F(5) atoms. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent F(2), and two equivalent F(7) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent F(3), two equivalent F(6), two equivalent F(8), and two equivalent F(9) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(4), one F(10), two equivalent F(1), and two equivalent F(5) atoms. In the fifth La site, La(5) is bonded in a distorted body-centered cubic geometry to two equivalent O(3), two equivalent F(2), two equivalent F(6), and two equivalent F(7) atoms. In the sixth La site, La(6) is bonded in a distorted body-centered cubic geometry to two equivalent O(1), two equivalent F(3), two equivalent F(4), and two equivalent F(8) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent La(6) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent F(3)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(3)La4 tetrahedra, and edges with four equivalent F(4)La4 tetrahedra. In the second O site, O(2) is bonded to two equivalent La(2) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent F(2)La4 tetrahedra, corners with four equivalent O(2)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra,  an edgeedge with one F(2)La4 tetrahedra, and edges with four equivalent O(4)La4 tetrahedra. In the third O site, O(3) is bonded to two equivalent La(3) and two equivalent La(5) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent F(2)La4 tetrahedra, corners with two equivalent F(3)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(2)La4 tetrahedra,  an edgeedge with one F(3)La4 tetrahedra, and edges with four equivalent F(6)La4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent La(2) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent F(7)La4 tetrahedra, corners with four equivalent O(4)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra,  an edgeedge with one F(7)La4 tetrahedra, and edges with four equivalent O(2)La4 tetrahedra. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one La(1) and two equivalent La(4) atoms. In the second F site, F(2) is bonded to two equivalent La(2) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent O(2)La4 tetrahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent O(4)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one O(2)La4 tetrahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with four equivalent F(7)La4 tetrahedra. In the third F site, F(3) is bonded to two equivalent La(3) and two equivalent La(6) atoms to form distorted FLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(4)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one O(1)La4 tetrahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with four equivalent F(8)La4 tetrahedra. In the fourth F site, F(4) is bonded to two equivalent La(1) and two equivalent La(6) atoms to form FLa4 tetrahedra that share corners with two equivalent F(8)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(4)La4 tetrahedra,  an edgeedge with one F(8)La4 tetrahedra, and edges with four equivalent O(1)La4 tetrahedra. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent La(4) atoms. In the sixth F site, F(6) is bonded to two equivalent La(3) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent F(7)La4 tetrahedra, corners with two equivalent F(8)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one F(7)La4 tetrahedra,  an edgeedge with one F(8)La4 tetrahedra, and edges with four equivalent O(3)La4 tetrahedra. In the seventh F site, F(7) is bonded to two equivalent La(2) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent O(4)La4 tetrahedra, corners with two equivalent F(6)La4 tetrahedra, corners with four equivalent O(2)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra,  an edgeedge with one O(4)La4 tetrahedra,  an edgeedge with one F(6)La4 tetrahedra, and edges with four equivalent F(2)La4 tetrahedra. In the eighth F site, F(8) is bonded to two equivalent La(3) and two equivalent La(6) atoms to form distorted FLa4 tetrahedra that share corners with two equivalent F(4)La4 tetrahedra, corners with two equivalent F(6)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(4)La4 tetrahedra,  an edgeedge with one F(6)La4 tetrahedra, and edges with four equivalent F(3)La4 tetrahedra. In the ninth F site, F(9) is bonded in a distorted water-like geometry to two equivalent La(3) atoms. In the tenth F site, F(10) is bonded in a trigonal non-coplanar geometry to one La(4) and two equivalent La(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_La3O2F5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.138
_cell_length_b   4.184
_cell_length_c   17.608
_cell_angle_alpha   89.627
_cell_angle_beta   89.702
_cell_angle_gamma   88.666
_symmetry_Int_Tables_number   1
_cell_volume   304.726
_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
  La  La0  1  0.226  0.730  0.915  1.0
  La  La1  1  0.252  0.734  0.600  1.0
  La  La2  1  0.256  0.835  0.253  1.0
  La  La3  1  0.756  0.257  0.737  1.0
  La  La4  1  0.748  0.233  0.411  1.0
  La  La5  1  0.761  0.242  0.073  1.0
  O  O6  1  0.279  0.254  0.005  1.0
  O  O7  1  0.251  0.223  0.664  1.0
  O  O8  1  0.251  0.223  0.344  1.0
  O  O9  1  0.751  0.737  0.663  1.0
  F  F10  1  0.224  0.585  0.783  1.0
  F  F11  1  0.249  0.233  0.501  1.0
  F  F12  1  0.259  0.250  0.159  1.0
  F  F13  1  0.750  0.744  0.998  1.0
  F  F14  1  0.693  0.799  0.840  1.0
  F  F15  1  0.750  0.723  0.337  1.0
  F  F16  1  0.749  0.731  0.490  1.0
  F  F17  1  0.755  0.729  0.150  1.0
  F  F18  1  0.756  0.174  0.245  1.0
  F  F19  1  0.935  0.259  0.885  1.0
[/CIF]
.
The crystal structure described by La3O2F5 crystallizes in the triclinic P1 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), one F(1), two equivalent F(10), two equivalent F(4), and two equivalent F(5) atoms. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent F(2), and two equivalent F(7) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent F(3), two equivalent F(6), two equivalent F(8), and two equivalent F(9) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(4), one F(10), two equivalent F(1), and two equivalent F(5) atoms. In the fifth La site, La(5) is bonded in a distorted body-centered cubic geometry to two equivalent O(3), two equivalent F(2), two equivalent F(6), and two equivalent F(7) atoms. In the sixth La site, La(6) is bonded in a distorted body-centered cubic geometry to two equivalent O(1), two equivalent F(3), two equivalent F(4), and two equivalent F(8) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent La(6) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent F(3)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(3)La4 tetrahedra, and edges with four equivalent F(4)La4 tetrahedra. In the second O site, O(2) is bonded to two equivalent La(2) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent F(2)La4 tetrahedra, corners with four equivalent O(2)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra,  an edgeedge with one F(2)La4 tetrahedra, and edges with four equivalent O(4)La4 tetrahedra. In the third O site, O(3) is bonded to two equivalent La(3) and two equivalent La(5) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent F(2)La4 tetrahedra, corners with two equivalent F(3)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(2)La4 tetrahedra,  an edgeedge with one F(3)La4 tetrahedra, and edges with four equivalent F(6)La4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent La(2) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent F(7)La4 tetrahedra, corners with four equivalent O(4)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra,  an edgeedge with one F(7)La4 tetrahedra, and edges with four equivalent O(2)La4 tetrahedra. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one La(1) and two equivalent La(4) atoms. In the second F site, F(2) is bonded to two equivalent La(2) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent O(2)La4 tetrahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent O(4)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one O(2)La4 tetrahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with four equivalent F(7)La4 tetrahedra. In the third F site, F(3) is bonded to two equivalent La(3) and two equivalent La(6) atoms to form distorted FLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(4)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one O(1)La4 tetrahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with four equivalent F(8)La4 tetrahedra. In the fourth F site, F(4) is bonded to two equivalent La(1) and two equivalent La(6) atoms to form FLa4 tetrahedra that share corners with two equivalent F(8)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(4)La4 tetrahedra,  an edgeedge with one F(8)La4 tetrahedra, and edges with four equivalent O(1)La4 tetrahedra. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent La(4) atoms. In the sixth F site, F(6) is bonded to two equivalent La(3) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent F(7)La4 tetrahedra, corners with two equivalent F(8)La4 tetrahedra, corners with four equivalent F(2)La4 tetrahedra, corners with four equivalent F(3)La4 tetrahedra, corners with four equivalent F(6)La4 tetrahedra,  an edgeedge with one F(7)La4 tetrahedra,  an edgeedge with one F(8)La4 tetrahedra, and edges with four equivalent O(3)La4 tetrahedra. In the seventh F site, F(7) is bonded to two equivalent La(2) and two equivalent La(5) atoms to form FLa4 tetrahedra that share corners with two equivalent O(4)La4 tetrahedra, corners with two equivalent F(6)La4 tetrahedra, corners with four equivalent O(2)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(7)La4 tetrahedra,  an edgeedge with one O(4)La4 tetrahedra,  an edgeedge with one F(6)La4 tetrahedra, and edges with four equivalent F(2)La4 tetrahedra. In the eighth F site, F(8) is bonded to two equivalent La(3) and two equivalent La(6) atoms to form distorted FLa4 tetrahedra that share corners with two equivalent F(4)La4 tetrahedra, corners with two equivalent F(6)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra, corners with four equivalent F(8)La4 tetrahedra,  an edgeedge with one F(4)La4 tetrahedra,  an edgeedge with one F(6)La4 tetrahedra, and edges with four equivalent F(3)La4 tetrahedra. In the ninth F site, F(9) is bonded in a distorted water-like geometry to two equivalent La(3) atoms. In the tenth F site, F(10) is bonded in a trigonal non-coplanar geometry to one La(4) and two equivalent La(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_La3O2F5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.138
_cell_length_b   4.184
_cell_length_c   17.608
_cell_angle_alpha   89.627
_cell_angle_beta   89.702
_cell_angle_gamma   88.666
_symmetry_Int_Tables_number   1
_cell_volume   304.726
_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
  La  La0  1  0.226  0.730  0.915  1.0
  La  La1  1  0.252  0.734  0.600  1.0
  La  La2  1  0.256  0.835  0.253  1.0
  La  La3  1  0.756  0.257  0.737  1.0
  La  La4  1  0.748  0.233  0.411  1.0
  La  La5  1  0.761  0.242  0.073  1.0
  O  O6  1  0.279  0.254  0.005  1.0
  O  O7  1  0.251  0.223  0.664  1.0
  O  O8  1  0.251  0.223  0.344  1.0
  O  O9  1  0.751  0.737  0.663  1.0
  F  F10  1  0.224  0.585  0.783  1.0
  F  F11  1  0.249  0.233  0.501  1.0
  F  F12  1  0.259  0.250  0.159  1.0
  F  F13  1  0.750  0.744  0.998  1.0
  F  F14  1  0.693  0.799  0.840  1.0
  F  F15  1  0.750  0.723  0.337  1.0
  F  F16  1  0.749  0.731  0.490  1.0
  F  F17  1  0.755  0.729  0.150  1.0
  F  F18  1  0.756  0.174  0.245  1.0
  F  F19  1  0.935  0.259  0.885  1.0
[/CIF]
.