The structure described by Fe2SiO4 is Spinel structured and crystallizes in the cubic Fd-3m space group. Fe(1) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with six equivalent Fe(1)O6 octahedra. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with twelve equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. O(1) is bonded in a rectangular see-saw-like geometry to three equivalent Fe(1) and one Si(1) atom. is represented by the CIF card [CIF]
data_Fe2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.890
_cell_length_b   5.890
_cell_length_c   5.890
_cell_angle_alpha   89.847
_cell_angle_beta   60.095
_cell_angle_gamma   119.919
_symmetry_Int_Tables_number   1
_cell_volume   144.703
_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
  Fe  Fe0  1  0.250  0.375  0.375  1.0
  Fe  Fe1  1  0.750  0.375  0.875  1.0
  Fe  Fe2  1  0.750  0.375  0.375  1.0
  Fe  Fe3  1  0.250  0.875  0.375  1.0
  Si  Si4  1  0.000  1.000  0.000  1.0
  Si  Si5  1  0.500  0.750  0.750  1.0
  O  O6  1  0.231  0.116  0.653  1.0
  O  O7  1  0.769  0.116  0.116  1.0
  O  O8  1  0.769  0.653  0.116  1.0
  O  O9  1  0.231  0.116  0.116  1.0
  O  O10  1  0.269  0.634  0.097  1.0
  O  O11  1  0.731  0.634  0.634  1.0
  O  O12  1  0.731  0.097  0.634  1.0
  O  O13  1  0.269  0.634  0.634  1.0
[/CIF]
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The structure described by Fe2SiO4 is Spinel structured and crystallizes in the cubic Fd-3m space group. Fe(1) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with six equivalent Fe(1)O6 octahedra. Si(1) is bonded to four equivalent O(1) atoms to form SiO4 tetrahedra that share corners with twelve equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. O(1) is bonded in a rectangular see-saw-like geometry to three equivalent Fe(1) and one Si(1) atom. is represented by the CIF card [CIF]
data_Fe2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.890
_cell_length_b   5.890
_cell_length_c   5.890
_cell_angle_alpha   89.847
_cell_angle_beta   60.095
_cell_angle_gamma   119.919
_symmetry_Int_Tables_number   1
_cell_volume   144.703
_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
  Fe  Fe0  1  0.250  0.375  0.375  1.0
  Fe  Fe1  1  0.750  0.375  0.875  1.0
  Fe  Fe2  1  0.750  0.375  0.375  1.0
  Fe  Fe3  1  0.250  0.875  0.375  1.0
  Si  Si4  1  0.000  1.000  0.000  1.0
  Si  Si5  1  0.500  0.750  0.750  1.0
  O  O6  1  0.231  0.116  0.653  1.0
  O  O7  1  0.769  0.116  0.116  1.0
  O  O8  1  0.769  0.653  0.116  1.0
  O  O9  1  0.231  0.116  0.116  1.0
  O  O10  1  0.269  0.634  0.097  1.0
  O  O11  1  0.731  0.634  0.634  1.0
  O  O12  1  0.731  0.097  0.634  1.0
  O  O13  1  0.269  0.634  0.634  1.0
[/CIF]
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