The structure described by Na2CoSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Na(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Co(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with four equivalent Co(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one Co(1), and one Si(1) atom to form distorted corner-sharing ONa2CoSi tetrahedra. In the third O site, O(3) is bonded to two equivalent Na(1), one Co(1), and one Si(1) atom to form distorted corner-sharing ONa2CoSi tetrahedra. is represented by the CIF file [CIF]
data_Na2CoSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.382
_cell_length_b   6.129
_cell_length_c   6.301
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   207.827
_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  0.494  0.357  1.000  1.0
  Co  Co1  1  0.994  0.643  0.500  1.0
  Na  Na2  1  0.502  0.831  0.252  1.0
  Na  Na3  1  0.002  0.169  0.248  1.0
  Na  Na4  1  0.002  0.169  0.752  1.0
  Na  Na5  1  0.502  0.831  0.748  1.0
  O  O6  1  0.130  0.417  0.000  1.0
  O  O7  1  0.630  0.583  0.500  1.0
  O  O8  1  0.688  0.627  0.000  1.0
  O  O9  1  0.188  0.373  0.500  1.0
  O  O10  1  0.069  0.798  0.218  1.0
  O  O11  1  0.569  0.202  0.282  1.0
  O  O12  1  0.569  0.202  0.718  1.0
  O  O13  1  0.069  0.798  0.782  1.0
  Si  Si14  1  0.992  0.657  1.000  1.0
  Si  Si15  1  0.492  0.343  0.500  1.0
[/CIF]
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The structure described by Na2CoSiO4 is beta beryllia-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. Na(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form NaO4 tetrahedra that share corners with four equivalent Na(1)O4 tetrahedra, corners with four equivalent Co(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. Co(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with four equivalent Co(1)O4 tetrahedra and corners with eight equivalent Na(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one Co(1), and one Si(1) atom to form distorted corner-sharing ONa2CoSi tetrahedra. In the third O site, O(3) is bonded to two equivalent Na(1), one Co(1), and one Si(1) atom to form distorted corner-sharing ONa2CoSi tetrahedra. is represented by the CIF file [CIF]
data_Na2CoSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.382
_cell_length_b   6.129
_cell_length_c   6.301
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   207.827
_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  0.494  0.357  1.000  1.0
  Co  Co1  1  0.994  0.643  0.500  1.0
  Na  Na2  1  0.502  0.831  0.252  1.0
  Na  Na3  1  0.002  0.169  0.248  1.0
  Na  Na4  1  0.002  0.169  0.752  1.0
  Na  Na5  1  0.502  0.831  0.748  1.0
  O  O6  1  0.130  0.417  0.000  1.0
  O  O7  1  0.630  0.583  0.500  1.0
  O  O8  1  0.688  0.627  0.000  1.0
  O  O9  1  0.188  0.373  0.500  1.0
  O  O10  1  0.069  0.798  0.218  1.0
  O  O11  1  0.569  0.202  0.282  1.0
  O  O12  1  0.569  0.202  0.718  1.0
  O  O13  1  0.069  0.798  0.782  1.0
  Si  Si14  1  0.992  0.657  1.000  1.0
  Si  Si15  1  0.492  0.343  0.500  1.0
[/CIF]
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