The crystal structure described by Sr5Cr3O12F crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), four equivalent O(3), and one F(1) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Sr(2), and one Cr(1) atom to form distorted edge-sharing OSr3Cr tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. F(1) is bonded in a trigonal planar geometry to three equivalent Sr(1) atoms. is represented by the CIF card [CIF]
data_Sr5Cr3O12F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.925
_cell_length_b   9.925
_cell_length_c   7.447
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   635.255
_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
  Sr  Sr0  1  0.760  0.750  0.250  1.0
  Sr  Sr1  1  0.990  0.240  0.250  1.0
  Sr  Sr2  1  0.750  0.990  0.750  1.0
  Sr  Sr3  1  0.010  0.760  0.750  1.0
  Sr  Sr4  1  0.240  0.250  0.750  1.0
  Sr  Sr5  1  0.250  0.010  0.250  1.0
  Sr  Sr6  1  0.333  0.667  0.501  1.0
  Sr  Sr7  1  0.667  0.333  0.001  1.0
  Sr  Sr8  1  0.667  0.333  0.499  1.0
  Sr  Sr9  1  0.333  0.667  0.999  1.0
  Cr  Cr10  1  0.600  0.969  0.250  1.0
  Cr  Cr11  1  0.031  0.631  0.250  1.0
  Cr  Cr12  1  0.631  0.600  0.750  1.0
  Cr  Cr13  1  0.400  0.031  0.750  1.0
  Cr  Cr14  1  0.969  0.369  0.750  1.0
  Cr  Cr15  1  0.369  0.400  0.250  1.0
  O  O16  1  0.522  0.689  0.750  1.0
  O  O17  1  0.598  0.129  0.750  1.0
  O  O18  1  0.253  0.344  0.434  1.0
  O  O19  1  0.909  0.253  0.934  1.0
  O  O20  1  0.345  0.091  0.934  1.0
  O  O21  1  0.656  0.909  0.434  1.0
  O  O22  1  0.091  0.747  0.434  1.0
  O  O23  1  0.747  0.655  0.934  1.0
  O  O24  1  0.747  0.655  0.566  1.0
  O  O25  1  0.091  0.747  0.066  1.0
  O  O26  1  0.656  0.909  0.066  1.0
  O  O27  1  0.345  0.091  0.566  1.0
  O  O28  1  0.871  0.469  0.750  1.0
  O  O29  1  0.253  0.344  0.066  1.0
  O  O30  1  0.531  0.402  0.750  1.0
  O  O31  1  0.129  0.531  0.250  1.0
  O  O32  1  0.478  0.311  0.250  1.0
  O  O33  1  0.167  0.478  0.750  1.0
  O  O34  1  0.311  0.833  0.750  1.0
  O  O35  1  0.689  0.167  0.250  1.0
  O  O36  1  0.833  0.522  0.250  1.0
  O  O37  1  0.909  0.253  0.566  1.0
  O  O38  1  0.469  0.598  0.250  1.0
  O  O39  1  0.402  0.871  0.250  1.0
  F  F40  1  0.000  1.000  0.250  1.0
  F  F41  1  1.000  1.000  0.750  1.0
[/CIF]
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The crystal structure described by Sr5Cr3O12F crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), four equivalent O(3), and one F(1) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), two equivalent Sr(2), and one Cr(1) atom to form distorted edge-sharing OSr3Cr tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. F(1) is bonded in a trigonal planar geometry to three equivalent Sr(1) atoms. is represented by the CIF card [CIF]
data_Sr5Cr3O12F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.925
_cell_length_b   9.925
_cell_length_c   7.447
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   635.255
_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
  Sr  Sr0  1  0.760  0.750  0.250  1.0
  Sr  Sr1  1  0.990  0.240  0.250  1.0
  Sr  Sr2  1  0.750  0.990  0.750  1.0
  Sr  Sr3  1  0.010  0.760  0.750  1.0
  Sr  Sr4  1  0.240  0.250  0.750  1.0
  Sr  Sr5  1  0.250  0.010  0.250  1.0
  Sr  Sr6  1  0.333  0.667  0.501  1.0
  Sr  Sr7  1  0.667  0.333  0.001  1.0
  Sr  Sr8  1  0.667  0.333  0.499  1.0
  Sr  Sr9  1  0.333  0.667  0.999  1.0
  Cr  Cr10  1  0.600  0.969  0.250  1.0
  Cr  Cr11  1  0.031  0.631  0.250  1.0
  Cr  Cr12  1  0.631  0.600  0.750  1.0
  Cr  Cr13  1  0.400  0.031  0.750  1.0
  Cr  Cr14  1  0.969  0.369  0.750  1.0
  Cr  Cr15  1  0.369  0.400  0.250  1.0
  O  O16  1  0.522  0.689  0.750  1.0
  O  O17  1  0.598  0.129  0.750  1.0
  O  O18  1  0.253  0.344  0.434  1.0
  O  O19  1  0.909  0.253  0.934  1.0
  O  O20  1  0.345  0.091  0.934  1.0
  O  O21  1  0.656  0.909  0.434  1.0
  O  O22  1  0.091  0.747  0.434  1.0
  O  O23  1  0.747  0.655  0.934  1.0
  O  O24  1  0.747  0.655  0.566  1.0
  O  O25  1  0.091  0.747  0.066  1.0
  O  O26  1  0.656  0.909  0.066  1.0
  O  O27  1  0.345  0.091  0.566  1.0
  O  O28  1  0.871  0.469  0.750  1.0
  O  O29  1  0.253  0.344  0.066  1.0
  O  O30  1  0.531  0.402  0.750  1.0
  O  O31  1  0.129  0.531  0.250  1.0
  O  O32  1  0.478  0.311  0.250  1.0
  O  O33  1  0.167  0.478  0.750  1.0
  O  O34  1  0.311  0.833  0.750  1.0
  O  O35  1  0.689  0.167  0.250  1.0
  O  O36  1  0.833  0.522  0.250  1.0
  O  O37  1  0.909  0.253  0.566  1.0
  O  O38  1  0.469  0.598  0.250  1.0
  O  O39  1  0.402  0.871  0.250  1.0
  F  F40  1  0.000  1.000  0.250  1.0
  F  F41  1  1.000  1.000  0.750  1.0
[/CIF]
.