The structure described by Co2(OH)2CO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form a mixture of distorted corner and edge-sharing CoO4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-77°. In the second Co site, Co(2) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one Co(1)O4 tetrahedra. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. There are five inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one Co(1), two equivalent Co(2), and one H(2) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one Co(1), two equivalent Co(2), and one H(1) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Co(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one C(1) atom. is represented by the CIF card [CIF]
data_Co2H2CO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.195
_cell_length_b   11.306
_cell_length_c   12.306
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   121.313
_symmetry_Int_Tables_number   1
_cell_volume   379.817
_cell_formula_units_Z   4
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
  Co  Co0  1  0.783  0.983  0.214  1.0
  Co  Co1  1  0.217  0.517  0.714  1.0
  Co  Co2  1  0.217  0.017  0.786  1.0
  Co  Co3  1  0.783  0.483  0.286  1.0
  Co  Co4  1  0.939  0.715  0.113  1.0
  Co  Co5  1  0.061  0.785  0.613  1.0
  Co  Co6  1  0.061  0.285  0.887  1.0
  Co  Co7  1  0.939  0.215  0.387  1.0
  H  H8  1  0.248  0.108  0.981  1.0
  H  H9  1  0.752  0.392  0.481  1.0
  H  H10  1  0.752  0.892  0.019  1.0
  H  H11  1  0.248  0.608  0.519  1.0
  H  H12  1  0.935  0.501  0.899  1.0
  H  H13  1  0.065  0.999  0.399  1.0
  H  H14  1  0.065  0.499  0.101  1.0
  H  H15  1  0.935  0.001  0.601  1.0
  C  C16  1  0.021  0.759  0.368  1.0
  C  C17  1  0.979  0.741  0.868  1.0
  C  C18  1  0.979  0.241  0.632  1.0
  C  C19  1  0.021  0.259  0.132  1.0
  O  O20  1  0.751  0.625  0.380  1.0
  O  O21  1  0.249  0.875  0.880  1.0
  O  O22  1  0.249  0.375  0.620  1.0
  O  O23  1  0.751  0.125  0.120  1.0
  O  O24  1  0.148  0.810  0.269  1.0
  O  O25  1  0.852  0.690  0.769  1.0
  O  O26  1  0.852  0.190  0.731  1.0
  O  O27  1  0.148  0.310  0.231  1.0
  O  O28  1  0.162  0.842  0.449  1.0
  O  O29  1  0.838  0.658  0.949  1.0
  O  O30  1  0.838  0.158  0.551  1.0
  O  O31  1  0.162  0.342  0.051  1.0
  O  O32  1  0.167  0.575  0.154  1.0
  O  O33  1  0.833  0.925  0.654  1.0
  O  O34  1  0.833  0.425  0.846  1.0
  O  O35  1  0.167  0.075  0.346  1.0
  O  O36  1  0.697  0.856  0.093  1.0
  O  O37  1  0.303  0.644  0.593  1.0
  O  O38  1  0.303  0.144  0.907  1.0
  O  O39  1  0.697  0.356  0.407  1.0
[/CIF]
.
The structure described by Co2(OH)2CO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form a mixture of distorted corner and edge-sharing CoO4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-77°. In the second Co site, Co(2) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one Co(1)O4 tetrahedra. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. There are five inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one Co(1), two equivalent Co(2), and one H(2) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one Co(1), two equivalent Co(2), and one H(1) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Co(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one C(1) atom. is represented by the CIF card [CIF]
data_Co2H2CO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.195
_cell_length_b   11.306
_cell_length_c   12.306
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   121.313
_symmetry_Int_Tables_number   1
_cell_volume   379.817
_cell_formula_units_Z   4
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
  Co  Co0  1  0.783  0.983  0.214  1.0
  Co  Co1  1  0.217  0.517  0.714  1.0
  Co  Co2  1  0.217  0.017  0.786  1.0
  Co  Co3  1  0.783  0.483  0.286  1.0
  Co  Co4  1  0.939  0.715  0.113  1.0
  Co  Co5  1  0.061  0.785  0.613  1.0
  Co  Co6  1  0.061  0.285  0.887  1.0
  Co  Co7  1  0.939  0.215  0.387  1.0
  H  H8  1  0.248  0.108  0.981  1.0
  H  H9  1  0.752  0.392  0.481  1.0
  H  H10  1  0.752  0.892  0.019  1.0
  H  H11  1  0.248  0.608  0.519  1.0
  H  H12  1  0.935  0.501  0.899  1.0
  H  H13  1  0.065  0.999  0.399  1.0
  H  H14  1  0.065  0.499  0.101  1.0
  H  H15  1  0.935  0.001  0.601  1.0
  C  C16  1  0.021  0.759  0.368  1.0
  C  C17  1  0.979  0.741  0.868  1.0
  C  C18  1  0.979  0.241  0.632  1.0
  C  C19  1  0.021  0.259  0.132  1.0
  O  O20  1  0.751  0.625  0.380  1.0
  O  O21  1  0.249  0.875  0.880  1.0
  O  O22  1  0.249  0.375  0.620  1.0
  O  O23  1  0.751  0.125  0.120  1.0
  O  O24  1  0.148  0.810  0.269  1.0
  O  O25  1  0.852  0.690  0.769  1.0
  O  O26  1  0.852  0.190  0.731  1.0
  O  O27  1  0.148  0.310  0.231  1.0
  O  O28  1  0.162  0.842  0.449  1.0
  O  O29  1  0.838  0.658  0.949  1.0
  O  O30  1  0.838  0.158  0.551  1.0
  O  O31  1  0.162  0.342  0.051  1.0
  O  O32  1  0.167  0.575  0.154  1.0
  O  O33  1  0.833  0.925  0.654  1.0
  O  O34  1  0.833  0.425  0.846  1.0
  O  O35  1  0.167  0.075  0.346  1.0
  O  O36  1  0.697  0.856  0.093  1.0
  O  O37  1  0.303  0.644  0.593  1.0
  O  O38  1  0.303  0.144  0.907  1.0
  O  O39  1  0.697  0.356  0.407  1.0
[/CIF]
.