The material described by Co2Zn2O5 crystallizes in the monoclinic Pm space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a see-saw-like geometry to one O(1), one O(4), and two equivalent O(8) atoms. In the second Co site, Co(2) is bonded to one O(1), one O(3), and two equivalent O(10) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Zn(4)O4 tetrahedra, and corners with two equivalent Zn(3)O4 trigonal pyramids. In the third Co site, Co(3) is bonded to one O(2), one O(9), and two equivalent O(5) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent Zn(4)O4 tetrahedra. In the fourth Co site, Co(4) is bonded in a distorted see-saw-like geometry to one O(7), one O(9), and two equivalent O(6) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(5), one O(6), two equivalent O(3), and two equivalent O(9) atoms. In the third Zn site, Zn(3) is bonded to one O(10), one O(8), and two equivalent O(7) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 trigonal pyramids, and  an edgeedge with one Zn(4)O4 tetrahedra. In the fourth Zn site, Zn(4) is bonded to one O(10), one O(8), and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Zn(4)O4 tetrahedra, and  an edgeedge with one Zn(3)O4 trigonal pyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Co(1) and one Co(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(3) and two equivalent Zn(4) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Zn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Co(1) and two equivalent Zn(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Co(3), one Zn(1), and one Zn(2) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Co(4), one Zn(1), and one Zn(2) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Zn(3) atoms. In the eighth O site, O(8) is bonded to two equivalent Co(1), one Zn(3), and one Zn(4) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), one Co(4), and two equivalent Zn(2) atoms. In the tenth O site, O(10) is bonded to two equivalent Co(2), one Zn(3), and one Zn(4) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn2Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.258
_cell_length_b   6.275
_cell_length_c   10.742
_cell_angle_alpha   89.130
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   219.592
_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  0.000  0.638  0.884  1.0
  Zn  Zn1  1  0.000  0.295  0.103  1.0
  Zn  Zn2  1  0.000  0.146  0.607  1.0
  Zn  Zn3  1  0.000  0.853  0.389  1.0
  Co  Co4  1  0.500  0.686  0.631  1.0
  Co  Co5  1  0.500  0.337  0.373  1.0
  Co  Co6  1  0.500  0.794  0.125  1.0
  Co  Co7  1  0.500  0.162  0.871  1.0
  O  O8  1  0.500  0.506  0.503  1.0
  O  O9  1  0.500  0.800  0.296  1.0
  O  O10  1  0.500  0.336  0.206  1.0
  O  O11  1  0.500  0.735  0.800  1.0
  O  O12  1  0.000  0.662  0.070  1.0
  O  O13  1  0.000  0.323  0.909  1.0
  O  O14  1  0.500  0.190  0.703  1.0
  O  O15  1  0.000  0.821  0.580  1.0
  O  O16  1  0.500  0.040  0.029  1.0
  O  O17  1  0.000  0.174  0.421  1.0
[/CIF]
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The material described by Co2Zn2O5 crystallizes in the monoclinic Pm space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a see-saw-like geometry to one O(1), one O(4), and two equivalent O(8) atoms. In the second Co site, Co(2) is bonded to one O(1), one O(3), and two equivalent O(10) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Zn(4)O4 tetrahedra, and corners with two equivalent Zn(3)O4 trigonal pyramids. In the third Co site, Co(3) is bonded to one O(2), one O(9), and two equivalent O(5) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent Zn(4)O4 tetrahedra. In the fourth Co site, Co(4) is bonded in a distorted see-saw-like geometry to one O(7), one O(9), and two equivalent O(6) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Co(3)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to one O(5), one O(6), two equivalent O(3), and two equivalent O(9) atoms. In the third Zn site, Zn(3) is bonded to one O(10), one O(8), and two equivalent O(7) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 trigonal pyramids, and  an edgeedge with one Zn(4)O4 tetrahedra. In the fourth Zn site, Zn(4) is bonded to one O(10), one O(8), and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Zn(4)O4 tetrahedra, and  an edgeedge with one Zn(3)O4 trigonal pyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Co(1) and one Co(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(3) and two equivalent Zn(4) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Zn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Co(1) and two equivalent Zn(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Co(3), one Zn(1), and one Zn(2) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Co(4), one Zn(1), and one Zn(2) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Co(4) and two equivalent Zn(3) atoms. In the eighth O site, O(8) is bonded to two equivalent Co(1), one Zn(3), and one Zn(4) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), one Co(4), and two equivalent Zn(2) atoms. In the tenth O site, O(10) is bonded to two equivalent Co(2), one Zn(3), and one Zn(4) atom to form a mixture of corner and edge-sharing OZn2Co2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn2Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.258
_cell_length_b   6.275
_cell_length_c   10.742
_cell_angle_alpha   89.130
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   219.592
_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  0.000  0.638  0.884  1.0
  Zn  Zn1  1  0.000  0.295  0.103  1.0
  Zn  Zn2  1  0.000  0.146  0.607  1.0
  Zn  Zn3  1  0.000  0.853  0.389  1.0
  Co  Co4  1  0.500  0.686  0.631  1.0
  Co  Co5  1  0.500  0.337  0.373  1.0
  Co  Co6  1  0.500  0.794  0.125  1.0
  Co  Co7  1  0.500  0.162  0.871  1.0
  O  O8  1  0.500  0.506  0.503  1.0
  O  O9  1  0.500  0.800  0.296  1.0
  O  O10  1  0.500  0.336  0.206  1.0
  O  O11  1  0.500  0.735  0.800  1.0
  O  O12  1  0.000  0.662  0.070  1.0
  O  O13  1  0.000  0.323  0.909  1.0
  O  O14  1  0.500  0.190  0.703  1.0
  O  O15  1  0.000  0.821  0.580  1.0
  O  O16  1  0.500  0.040  0.029  1.0
  O  O17  1  0.000  0.174  0.421  1.0
[/CIF]
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