The compound described by Co2Zn3O7 crystallizes in the orthorhombic Cmc2_1 space group. Co(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(4) and four equivalent O(3) atoms. 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 Co(1) and three equivalent Zn(2) atoms to form OZn3Co tetrahedra that share  a cornercorner with one O(4)Zn2Co2 tetrahedra and corners with six equivalent O(1)Zn3Co tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Zn(2), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Co(1) and two equivalent Zn(1) atoms to form distorted OZn2Co2 tetrahedra that share corners with two equivalent O(4)Zn2Co2 tetrahedra and corners with two equivalent O(1)Zn3Co tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn3Co2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.384
_cell_length_b   9.384
_cell_length_c   5.061
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   148.792
_symmetry_Int_Tables_number   1
_cell_volume   230.912
_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  0.247  0.247  0.294  1.0
  Zn  Zn1  1  0.753  0.753  0.794  1.0
  Zn  Zn2  1  0.035  0.429  0.198  1.0
  Zn  Zn3  1  0.965  0.571  0.698  1.0
  Zn  Zn4  1  0.429  0.035  0.198  1.0
  Zn  Zn5  1  0.571  0.965  0.698  1.0
  Co  Co6  1  0.850  0.648  0.248  1.0
  Co  Co7  1  0.150  0.352  0.748  1.0
  Co  Co8  1  0.352  0.150  0.748  1.0
  Co  Co9  1  0.648  0.850  0.248  1.0
  O  O10  1  0.651  0.054  0.308  1.0
  O  O11  1  0.349  0.946  0.808  1.0
  O  O12  1  0.946  0.349  0.808  1.0
  O  O13  1  0.054  0.651  0.308  1.0
  O  O14  1  0.441  0.699  0.939  1.0
  O  O15  1  0.559  0.301  0.439  1.0
  O  O16  1  0.301  0.559  0.439  1.0
  O  O17  1  0.699  0.441  0.939  1.0
  O  O18  1  0.995  0.146  0.060  1.0
  O  O19  1  0.005  0.854  0.560  1.0
  O  O20  1  0.630  0.630  0.180  1.0
  O  O21  1  0.370  0.370  0.680  1.0
  O  O22  1  0.146  0.995  0.060  1.0
  O  O23  1  0.854  0.005  0.560  1.0
[/CIF]
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The compound described by Co2Zn3O7 crystallizes in the orthorhombic Cmc2_1 space group. Co(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(4) and four equivalent O(3) atoms. 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 Co(1) and three equivalent Zn(2) atoms to form OZn3Co tetrahedra that share  a cornercorner with one O(4)Zn2Co2 tetrahedra and corners with six equivalent O(1)Zn3Co tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(1) and two equivalent Zn(2) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Co(1), one Zn(2), and two equivalent Zn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Co(1) and two equivalent Zn(1) atoms to form distorted OZn2Co2 tetrahedra that share corners with two equivalent O(4)Zn2Co2 tetrahedra and corners with two equivalent O(1)Zn3Co tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn3Co2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.384
_cell_length_b   9.384
_cell_length_c   5.061
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   148.792
_symmetry_Int_Tables_number   1
_cell_volume   230.912
_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  0.247  0.247  0.294  1.0
  Zn  Zn1  1  0.753  0.753  0.794  1.0
  Zn  Zn2  1  0.035  0.429  0.198  1.0
  Zn  Zn3  1  0.965  0.571  0.698  1.0
  Zn  Zn4  1  0.429  0.035  0.198  1.0
  Zn  Zn5  1  0.571  0.965  0.698  1.0
  Co  Co6  1  0.850  0.648  0.248  1.0
  Co  Co7  1  0.150  0.352  0.748  1.0
  Co  Co8  1  0.352  0.150  0.748  1.0
  Co  Co9  1  0.648  0.850  0.248  1.0
  O  O10  1  0.651  0.054  0.308  1.0
  O  O11  1  0.349  0.946  0.808  1.0
  O  O12  1  0.946  0.349  0.808  1.0
  O  O13  1  0.054  0.651  0.308  1.0
  O  O14  1  0.441  0.699  0.939  1.0
  O  O15  1  0.559  0.301  0.439  1.0
  O  O16  1  0.301  0.559  0.439  1.0
  O  O17  1  0.699  0.441  0.939  1.0
  O  O18  1  0.995  0.146  0.060  1.0
  O  O19  1  0.005  0.854  0.560  1.0
  O  O20  1  0.630  0.630  0.180  1.0
  O  O21  1  0.370  0.370  0.680  1.0
  O  O22  1  0.146  0.995  0.060  1.0
  O  O23  1  0.854  0.005  0.560  1.0
[/CIF]
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