The crystal structure described by Co2SiO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 14°. In the second Co site, Co(2) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(3)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. Si(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-61°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(3), two equivalent Co(1), and one Si(1) atom. In the second O site, O(3) is bonded to one Co(2) and four equivalent Co(1) atoms to form edge-sharing OCo5 square pyramids. In the third O site, O(4) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Si(1) atoms. In the fourth O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), one Co(3), and one Si(1) atom. is represented by the CIF card [CIF]
data_Co2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.732
_cell_length_b   7.732
_cell_length_c   7.732
_cell_angle_alpha   135.756
_cell_angle_beta   114.420
_cell_angle_gamma   82.542
_symmetry_Int_Tables_number   1
_cell_volume   283.379
_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  0.127  0.127  0.500  1.0
  Co  Co1  1  0.873  0.373  0.000  1.0
  Co  Co2  1  0.873  0.873  0.500  1.0
  Co  Co3  1  0.127  0.627  0.000  1.0
  Co  Co4  1  0.724  0.750  0.974  1.0
  Co  Co5  1  0.276  0.250  0.026  1.0
  Co  Co6  1  0.000  0.000  0.000  1.0
  Co  Co7  1  0.500  0.500  0.000  1.0
  Si  Si8  1  0.496  0.879  0.617  1.0
  Si  Si9  1  0.504  0.121  0.383  1.0
  Si  Si10  1  0.238  0.621  0.617  1.0
  Si  Si11  1  0.762  0.379  0.383  1.0
  O  O12  1  0.131  0.388  0.272  1.0
  O  O13  1  0.869  0.142  0.257  1.0
  O  O14  1  0.385  0.112  0.743  1.0
  O  O15  1  0.615  0.358  0.728  1.0
  O  O16  1  0.869  0.612  0.728  1.0
  O  O17  1  0.131  0.858  0.743  1.0
  O  O18  1  0.615  0.888  0.257  1.0
  O  O19  1  0.385  0.642  0.272  1.0
  O  O20  1  0.267  0.013  0.254  1.0
  O  O21  1  0.733  0.987  0.746  1.0
  O  O22  1  0.741  0.487  0.254  1.0
  O  O23  1  0.259  0.513  0.746  1.0
  O  O24  1  0.031  0.250  0.781  1.0
  O  O25  1  0.969  0.750  0.219  1.0
  O  O26  1  0.533  0.250  0.283  1.0
  O  O27  1  0.467  0.750  0.717  1.0
[/CIF]
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The crystal structure described by Co2SiO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 14°. In the second Co site, Co(2) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(3)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. Si(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-61°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(3), two equivalent Co(1), and one Si(1) atom. In the second O site, O(3) is bonded to one Co(2) and four equivalent Co(1) atoms to form edge-sharing OCo5 square pyramids. In the third O site, O(4) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Si(1) atoms. In the fourth O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), one Co(3), and one Si(1) atom. is represented by the CIF card [CIF]
data_Co2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.732
_cell_length_b   7.732
_cell_length_c   7.732
_cell_angle_alpha   135.756
_cell_angle_beta   114.420
_cell_angle_gamma   82.542
_symmetry_Int_Tables_number   1
_cell_volume   283.379
_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  0.127  0.127  0.500  1.0
  Co  Co1  1  0.873  0.373  0.000  1.0
  Co  Co2  1  0.873  0.873  0.500  1.0
  Co  Co3  1  0.127  0.627  0.000  1.0
  Co  Co4  1  0.724  0.750  0.974  1.0
  Co  Co5  1  0.276  0.250  0.026  1.0
  Co  Co6  1  0.000  0.000  0.000  1.0
  Co  Co7  1  0.500  0.500  0.000  1.0
  Si  Si8  1  0.496  0.879  0.617  1.0
  Si  Si9  1  0.504  0.121  0.383  1.0
  Si  Si10  1  0.238  0.621  0.617  1.0
  Si  Si11  1  0.762  0.379  0.383  1.0
  O  O12  1  0.131  0.388  0.272  1.0
  O  O13  1  0.869  0.142  0.257  1.0
  O  O14  1  0.385  0.112  0.743  1.0
  O  O15  1  0.615  0.358  0.728  1.0
  O  O16  1  0.869  0.612  0.728  1.0
  O  O17  1  0.131  0.858  0.743  1.0
  O  O18  1  0.615  0.888  0.257  1.0
  O  O19  1  0.385  0.642  0.272  1.0
  O  O20  1  0.267  0.013  0.254  1.0
  O  O21  1  0.733  0.987  0.746  1.0
  O  O22  1  0.741  0.487  0.254  1.0
  O  O23  1  0.259  0.513  0.746  1.0
  O  O24  1  0.031  0.250  0.781  1.0
  O  O25  1  0.969  0.750  0.219  1.0
  O  O26  1  0.533  0.250  0.283  1.0
  O  O27  1  0.467  0.750  0.717  1.0
[/CIF]
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