The crystal structure described by Zn2SiO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(3) and four equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with four equivalent Zn(3)O6 octahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and four equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with four equivalent Zn(3)O6 octahedra. In the third Zn site, Zn(3) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with three equivalent Zn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, corners with four equivalent Zn(3)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a rectangular see-saw-like geometry to one Zn(1), one Zn(2), one Zn(3), and one Si(1) atom. In the second O site, O(1) is bonded to one Zn(2) and four equivalent Zn(3) atoms to form edge-sharing OZn5 square pyramids. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(2) and two equivalent Si(1) atoms. In the fourth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), two equivalent Zn(3), and one Si(1) atom. is represented by the CIF card [CIF]
data_Zn2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.777
_cell_length_b   7.777
_cell_length_c   7.777
_cell_angle_alpha   136.072
_cell_angle_beta   113.564
_cell_angle_gamma   83.109
_symmetry_Int_Tables_number   1
_cell_volume   288.519
_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
  Zn  Zn0  1  0.500  0.500  0.000  1.0
  Zn  Zn1  1  0.000  0.000  0.000  1.0
  Zn  Zn2  1  0.782  0.750  0.032  1.0
  Zn  Zn3  1  0.218  0.250  0.968  1.0
  Zn  Zn4  1  0.375  0.375  0.500  1.0
  Zn  Zn5  1  0.625  0.125  0.000  1.0
  Zn  Zn6  1  0.375  0.875  0.000  1.0
  Zn  Zn7  1  0.625  0.625  0.500  1.0
  Si  Si8  1  0.004  0.621  0.383  1.0
  Si  Si9  1  0.996  0.379  0.617  1.0
  Si  Si10  1  0.738  0.121  0.617  1.0
  Si  Si11  1  0.262  0.879  0.383  1.0
  O  O12  1  0.538  0.750  0.788  1.0
  O  O13  1  0.462  0.250  0.212  1.0
  O  O14  1  0.036  0.750  0.286  1.0
  O  O15  1  0.964  0.250  0.714  1.0
  O  O16  1  0.244  0.987  0.257  1.0
  O  O17  1  0.756  0.013  0.743  1.0
  O  O18  1  0.230  0.487  0.743  1.0
  O  O19  1  0.770  0.513  0.257  1.0
  O  O20  1  0.632  0.359  0.744  1.0
  O  O21  1  0.368  0.113  0.727  1.0
  O  O22  1  0.114  0.859  0.727  1.0
  O  O23  1  0.886  0.613  0.744  1.0
  O  O24  1  0.368  0.641  0.256  1.0
  O  O25  1  0.632  0.887  0.273  1.0
  O  O26  1  0.886  0.141  0.273  1.0
  O  O27  1  0.114  0.387  0.256  1.0
[/CIF]
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The crystal structure described by Zn2SiO4 crystallizes in the orthorhombic Imma space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(3) and four equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with four equivalent Zn(3)O6 octahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and four equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with four equivalent Zn(3)O6 octahedra. In the third Zn site, Zn(3) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with three equivalent Zn(3)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, corners with four equivalent Zn(3)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a rectangular see-saw-like geometry to one Zn(1), one Zn(2), one Zn(3), and one Si(1) atom. In the second O site, O(1) is bonded to one Zn(2) and four equivalent Zn(3) atoms to form edge-sharing OZn5 square pyramids. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(2) and two equivalent Si(1) atoms. In the fourth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Zn(1), two equivalent Zn(3), and one Si(1) atom. is represented by the CIF card [CIF]
data_Zn2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.777
_cell_length_b   7.777
_cell_length_c   7.777
_cell_angle_alpha   136.072
_cell_angle_beta   113.564
_cell_angle_gamma   83.109
_symmetry_Int_Tables_number   1
_cell_volume   288.519
_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
  Zn  Zn0  1  0.500  0.500  0.000  1.0
  Zn  Zn1  1  0.000  0.000  0.000  1.0
  Zn  Zn2  1  0.782  0.750  0.032  1.0
  Zn  Zn3  1  0.218  0.250  0.968  1.0
  Zn  Zn4  1  0.375  0.375  0.500  1.0
  Zn  Zn5  1  0.625  0.125  0.000  1.0
  Zn  Zn6  1  0.375  0.875  0.000  1.0
  Zn  Zn7  1  0.625  0.625  0.500  1.0
  Si  Si8  1  0.004  0.621  0.383  1.0
  Si  Si9  1  0.996  0.379  0.617  1.0
  Si  Si10  1  0.738  0.121  0.617  1.0
  Si  Si11  1  0.262  0.879  0.383  1.0
  O  O12  1  0.538  0.750  0.788  1.0
  O  O13  1  0.462  0.250  0.212  1.0
  O  O14  1  0.036  0.750  0.286  1.0
  O  O15  1  0.964  0.250  0.714  1.0
  O  O16  1  0.244  0.987  0.257  1.0
  O  O17  1  0.756  0.013  0.743  1.0
  O  O18  1  0.230  0.487  0.743  1.0
  O  O19  1  0.770  0.513  0.257  1.0
  O  O20  1  0.632  0.359  0.744  1.0
  O  O21  1  0.368  0.113  0.727  1.0
  O  O22  1  0.114  0.859  0.727  1.0
  O  O23  1  0.886  0.613  0.744  1.0
  O  O24  1  0.368  0.641  0.256  1.0
  O  O25  1  0.632  0.887  0.273  1.0
  O  O26  1  0.886  0.141  0.273  1.0
  O  O27  1  0.114  0.387  0.256  1.0
[/CIF]
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