The compound described by Co(SiO3)2 crystallizes in the monoclinic C2 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Si(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-60°. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(2) and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(2) atom. is represented by the CIF file [CIF]
data_Co(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.399
_cell_length_b   6.399
_cell_length_c   5.336
_cell_angle_alpha   75.303
_cell_angle_beta   75.303
_cell_angle_gamma   84.255
_symmetry_Int_Tables_number   1
_cell_volume   204.257
_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
  Co  Co0  1  0.900  0.100  0.500  1.0
  Co  Co1  1  0.093  0.907  0.000  1.0
  Si  Si2  1  0.790  0.618  0.489  1.0
  Si  Si3  1  0.213  0.388  0.003  1.0
  Si  Si4  1  0.382  0.210  0.511  1.0
  Si  Si5  1  0.612  0.787  0.997  1.0
  O  O6  1  0.362  0.350  0.218  1.0
  O  O7  1  0.910  0.378  0.526  1.0
  O  O8  1  0.186  0.032  0.628  1.0
  O  O9  1  0.633  0.643  0.288  1.0
  O  O10  1  0.090  0.625  0.968  1.0
  O  O11  1  0.815  0.959  0.894  1.0
  O  O12  1  0.622  0.090  0.474  1.0
  O  O13  1  0.968  0.814  0.372  1.0
  O  O14  1  0.357  0.367  0.712  1.0
  O  O15  1  0.650  0.638  0.782  1.0
  O  O16  1  0.041  0.185  0.106  1.0
  O  O17  1  0.375  0.910  0.032  1.0
[/CIF]
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The compound described by Co(SiO3)2 crystallizes in the monoclinic C2 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with four equivalent Si(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-60°. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-63°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(2) and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(2) atom. is represented by the CIF file [CIF]
data_Co(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.399
_cell_length_b   6.399
_cell_length_c   5.336
_cell_angle_alpha   75.303
_cell_angle_beta   75.303
_cell_angle_gamma   84.255
_symmetry_Int_Tables_number   1
_cell_volume   204.257
_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
  Co  Co0  1  0.900  0.100  0.500  1.0
  Co  Co1  1  0.093  0.907  0.000  1.0
  Si  Si2  1  0.790  0.618  0.489  1.0
  Si  Si3  1  0.213  0.388  0.003  1.0
  Si  Si4  1  0.382  0.210  0.511  1.0
  Si  Si5  1  0.612  0.787  0.997  1.0
  O  O6  1  0.362  0.350  0.218  1.0
  O  O7  1  0.910  0.378  0.526  1.0
  O  O8  1  0.186  0.032  0.628  1.0
  O  O9  1  0.633  0.643  0.288  1.0
  O  O10  1  0.090  0.625  0.968  1.0
  O  O11  1  0.815  0.959  0.894  1.0
  O  O12  1  0.622  0.090  0.474  1.0
  O  O13  1  0.968  0.814  0.372  1.0
  O  O14  1  0.357  0.367  0.712  1.0
  O  O15  1  0.650  0.638  0.782  1.0
  O  O16  1  0.041  0.185  0.106  1.0
  O  O17  1  0.375  0.910  0.032  1.0
[/CIF]
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