The crystal structure described by Ca4CrFe3O10 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. In the second Ca site, Ca(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with four equivalent Fe(2)O6 octahedra and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form FeO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra, and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-44°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. There are five inequivalent O sites. In the first O site, O(5) is bonded to one Ca(1), one Ca(2), and two equivalent Fe(1) atoms to form distorted corner-sharing OCa2Fe2 tetrahedra. In the second O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Cr(1), and one Fe(2) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Cr(1), and one Fe(2) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Cr(1), and one Fe(1) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Fe(1), and one Fe(2) atom. is represented by the CIF file [CIF]
data_Ca4CrFe3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.493
_cell_length_b   5.690
_cell_length_c   15.830
_cell_angle_alpha   68.980
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   461.876
_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
  Ca  Ca0  1  0.978  0.368  0.107  1.0
  Ca  Ca1  1  0.478  0.632  0.393  1.0
  Ca  Ca2  1  0.022  0.919  0.607  1.0
  Ca  Ca3  1  0.522  0.081  0.893  1.0
  Ca  Ca4  1  0.022  0.632  0.893  1.0
  Ca  Ca5  1  0.522  0.368  0.607  1.0
  Ca  Ca6  1  0.978  0.081  0.393  1.0
  Ca  Ca7  1  0.478  0.919  0.107  1.0
  Cr  Cr8  1  0.500  0.500  0.000  1.0
  Cr  Cr9  1  0.000  0.500  0.500  1.0
  Fe  Fe10  1  0.446  0.320  0.249  1.0
  Fe  Fe11  1  0.946  0.680  0.251  1.0
  Fe  Fe12  1  0.554  0.680  0.751  1.0
  Fe  Fe13  1  0.054  0.320  0.749  1.0
  Fe  Fe14  1  0.500  0.000  0.500  1.0
  Fe  Fe15  1  0.000  0.000  0.000  1.0
  O  O16  1  0.765  0.280  0.983  1.0
  O  O17  1  0.265  0.720  0.517  1.0
  O  O18  1  0.236  0.252  0.482  1.0
  O  O19  1  0.736  0.748  0.018  1.0
  O  O20  1  0.235  0.720  0.017  1.0
  O  O21  1  0.735  0.280  0.483  1.0
  O  O22  1  0.764  0.748  0.518  1.0
  O  O23  1  0.264  0.252  0.982  1.0
  O  O24  1  0.527  0.288  0.138  1.0
  O  O25  1  0.027  0.712  0.362  1.0
  O  O26  1  0.469  0.937  0.643  1.0
  O  O27  1  0.969  0.063  0.857  1.0
  O  O28  1  0.473  0.712  0.862  1.0
  O  O29  1  0.973  0.288  0.638  1.0
  O  O30  1  0.531  0.063  0.357  1.0
  O  O31  1  0.031  0.937  0.143  1.0
  O  O32  1  0.092  0.370  0.250  1.0
  O  O33  1  0.592  0.630  0.250  1.0
  O  O34  1  0.908  0.630  0.750  1.0
  O  O35  1  0.408  0.370  0.750  1.0
[/CIF]
.
The crystal structure described by Ca4CrFe3O10 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. In the second Ca site, Ca(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with four equivalent Fe(2)O6 octahedra and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form FeO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra, and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-44°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra and corners with two equivalent Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. There are five inequivalent O sites. In the first O site, O(5) is bonded to one Ca(1), one Ca(2), and two equivalent Fe(1) atoms to form distorted corner-sharing OCa2Fe2 tetrahedra. In the second O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Cr(1), and one Fe(2) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent Ca(2), one Cr(1), and one Fe(2) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Cr(1), and one Fe(1) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Fe(1), and one Fe(2) atom. is represented by the CIF file [CIF]
data_Ca4CrFe3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.493
_cell_length_b   5.690
_cell_length_c   15.830
_cell_angle_alpha   68.980
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   461.876
_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
  Ca  Ca0  1  0.978  0.368  0.107  1.0
  Ca  Ca1  1  0.478  0.632  0.393  1.0
  Ca  Ca2  1  0.022  0.919  0.607  1.0
  Ca  Ca3  1  0.522  0.081  0.893  1.0
  Ca  Ca4  1  0.022  0.632  0.893  1.0
  Ca  Ca5  1  0.522  0.368  0.607  1.0
  Ca  Ca6  1  0.978  0.081  0.393  1.0
  Ca  Ca7  1  0.478  0.919  0.107  1.0
  Cr  Cr8  1  0.500  0.500  0.000  1.0
  Cr  Cr9  1  0.000  0.500  0.500  1.0
  Fe  Fe10  1  0.446  0.320  0.249  1.0
  Fe  Fe11  1  0.946  0.680  0.251  1.0
  Fe  Fe12  1  0.554  0.680  0.751  1.0
  Fe  Fe13  1  0.054  0.320  0.749  1.0
  Fe  Fe14  1  0.500  0.000  0.500  1.0
  Fe  Fe15  1  0.000  0.000  0.000  1.0
  O  O16  1  0.765  0.280  0.983  1.0
  O  O17  1  0.265  0.720  0.517  1.0
  O  O18  1  0.236  0.252  0.482  1.0
  O  O19  1  0.736  0.748  0.018  1.0
  O  O20  1  0.235  0.720  0.017  1.0
  O  O21  1  0.735  0.280  0.483  1.0
  O  O22  1  0.764  0.748  0.518  1.0
  O  O23  1  0.264  0.252  0.982  1.0
  O  O24  1  0.527  0.288  0.138  1.0
  O  O25  1  0.027  0.712  0.362  1.0
  O  O26  1  0.469  0.937  0.643  1.0
  O  O27  1  0.969  0.063  0.857  1.0
  O  O28  1  0.473  0.712  0.862  1.0
  O  O29  1  0.973  0.288  0.638  1.0
  O  O30  1  0.531  0.063  0.357  1.0
  O  O31  1  0.031  0.937  0.143  1.0
  O  O32  1  0.092  0.370  0.250  1.0
  O  O33  1  0.592  0.630  0.250  1.0
  O  O34  1  0.908  0.630  0.750  1.0
  O  O35  1  0.408  0.370  0.750  1.0
[/CIF]
.