The crystal structure described by Fe2Zn3O7 is Hausmannite-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with five equivalent Fe(1)O6 octahedra and corners with four equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form distorted ZnO4 tetrahedra that share corners with eight equivalent Fe(1)O6 octahedra and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 65-83°. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(2), and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Fe(1) and three equivalent Zn(2) atoms to form OZn3Fe tetrahedra that share  a cornercorner with one O(3)Zn2Fe2 tetrahedra,  a cornercorner with one O(4)Zn2Fe2 tetrahedra, corners with six equivalent O(1)Zn3Fe tetrahedra, and edges with two equivalent O(3)Zn2Fe2 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Fe(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded to two equivalent Fe(1), one Zn(1), and one Zn(2) atom to form distorted OZn2Fe2 tetrahedra that share  a cornercorner with one O(1)Zn3Fe tetrahedra, corners with three equivalent O(3)Zn2Fe2 tetrahedra, corners with four equivalent O(4)Zn2Fe2 tetrahedra, and edges with two equivalent O(1)Zn3Fe tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Fe(1) and two equivalent Zn(1) atoms to form OZn2Fe2 tetrahedra that share corners with two equivalent O(4)Zn2Fe2 tetrahedra, corners with two equivalent O(1)Zn3Fe tetrahedra, and corners with eight equivalent O(3)Zn2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_Zn3Fe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.424
_cell_length_b   9.424
_cell_length_c   5.223
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   147.299
_symmetry_Int_Tables_number   1
_cell_volume   250.638
_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
  Zn  Zn0  1  0.742  0.742  0.277  1.0
  Zn  Zn1  1  0.258  0.258  0.777  1.0
  Zn  Zn2  1  0.973  0.580  0.201  1.0
  Zn  Zn3  1  0.027  0.420  0.701  1.0
  Zn  Zn4  1  0.580  0.973  0.201  1.0
  Zn  Zn5  1  0.420  0.027  0.701  1.0
  Fe  Fe6  1  0.149  0.355  0.246  1.0
  Fe  Fe7  1  0.851  0.645  0.746  1.0
  Fe  Fe8  1  0.645  0.851  0.746  1.0
  Fe  Fe9  1  0.355  0.149  0.246  1.0
  O  O10  1  0.347  0.936  0.317  1.0
  O  O11  1  0.653  0.064  0.817  1.0
  O  O12  1  0.064  0.653  0.817  1.0
  O  O13  1  0.936  0.347  0.317  1.0
  O  O14  1  0.559  0.292  0.943  1.0
  O  O15  1  0.441  0.708  0.443  1.0
  O  O16  1  0.708  0.441  0.443  1.0
  O  O17  1  0.292  0.559  0.943  1.0
  O  O18  1  0.994  0.837  0.064  1.0
  O  O19  1  0.006  0.163  0.564  1.0
  O  O20  1  0.364  0.364  0.163  1.0
  O  O21  1  0.636  0.636  0.663  1.0
  O  O22  1  0.837  0.994  0.064  1.0
  O  O23  1  0.163  0.006  0.564  1.0
[/CIF]
.
The crystal structure described by Fe2Zn3O7 is Hausmannite-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with five equivalent Fe(1)O6 octahedra and corners with four equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form distorted ZnO4 tetrahedra that share corners with eight equivalent Fe(1)O6 octahedra and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 65-83°. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(2), and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Fe(1) and three equivalent Zn(2) atoms to form OZn3Fe tetrahedra that share  a cornercorner with one O(3)Zn2Fe2 tetrahedra,  a cornercorner with one O(4)Zn2Fe2 tetrahedra, corners with six equivalent O(1)Zn3Fe tetrahedra, and edges with two equivalent O(3)Zn2Fe2 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Fe(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded to two equivalent Fe(1), one Zn(1), and one Zn(2) atom to form distorted OZn2Fe2 tetrahedra that share  a cornercorner with one O(1)Zn3Fe tetrahedra, corners with three equivalent O(3)Zn2Fe2 tetrahedra, corners with four equivalent O(4)Zn2Fe2 tetrahedra, and edges with two equivalent O(1)Zn3Fe tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Fe(1) and two equivalent Zn(1) atoms to form OZn2Fe2 tetrahedra that share corners with two equivalent O(4)Zn2Fe2 tetrahedra, corners with two equivalent O(1)Zn3Fe tetrahedra, and corners with eight equivalent O(3)Zn2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_Zn3Fe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.424
_cell_length_b   9.424
_cell_length_c   5.223
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   147.299
_symmetry_Int_Tables_number   1
_cell_volume   250.638
_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
  Zn  Zn0  1  0.742  0.742  0.277  1.0
  Zn  Zn1  1  0.258  0.258  0.777  1.0
  Zn  Zn2  1  0.973  0.580  0.201  1.0
  Zn  Zn3  1  0.027  0.420  0.701  1.0
  Zn  Zn4  1  0.580  0.973  0.201  1.0
  Zn  Zn5  1  0.420  0.027  0.701  1.0
  Fe  Fe6  1  0.149  0.355  0.246  1.0
  Fe  Fe7  1  0.851  0.645  0.746  1.0
  Fe  Fe8  1  0.645  0.851  0.746  1.0
  Fe  Fe9  1  0.355  0.149  0.246  1.0
  O  O10  1  0.347  0.936  0.317  1.0
  O  O11  1  0.653  0.064  0.817  1.0
  O  O12  1  0.064  0.653  0.817  1.0
  O  O13  1  0.936  0.347  0.317  1.0
  O  O14  1  0.559  0.292  0.943  1.0
  O  O15  1  0.441  0.708  0.443  1.0
  O  O16  1  0.708  0.441  0.443  1.0
  O  O17  1  0.292  0.559  0.943  1.0
  O  O18  1  0.994  0.837  0.064  1.0
  O  O19  1  0.006  0.163  0.564  1.0
  O  O20  1  0.364  0.364  0.163  1.0
  O  O21  1  0.636  0.636  0.663  1.0
  O  O22  1  0.837  0.994  0.064  1.0
  O  O23  1  0.163  0.006  0.564  1.0
[/CIF]
.