The crystal structure described by Zn2SiO4 is Spinel-like structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-64°. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(1)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-64°. 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 two equivalent Zn(1)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Zn(2), two equivalent Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Zn(2), two equivalent Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Zn(1), two equivalent Zn(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Zn2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.850
_cell_length_b   6.099
_cell_length_c   10.438
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   308.739
_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  0.000  0.500  1.0
  Zn  Zn1  1  0.000  0.500  0.000  1.0
  Zn  Zn2  1  0.500  0.500  0.500  1.0
  Zn  Zn3  1  0.000  0.000  0.000  1.0
  Zn  Zn4  1  0.485  0.750  0.780  1.0
  Zn  Zn5  1  0.015  0.750  0.280  1.0
  Zn  Zn6  1  0.515  0.250  0.220  1.0
  Zn  Zn7  1  0.985  0.250  0.720  1.0
  Si  Si8  1  0.926  0.750  0.596  1.0
  Si  Si9  1  0.574  0.750  0.096  1.0
  Si  Si10  1  0.074  0.250  0.404  1.0
  Si  Si11  1  0.426  0.250  0.904  1.0
  O  O12  1  0.264  0.750  0.594  1.0
  O  O13  1  0.236  0.750  0.094  1.0
  O  O14  1  0.736  0.250  0.406  1.0
  O  O15  1  0.764  0.250  0.906  1.0
  O  O16  1  0.716  0.750  0.949  1.0
  O  O17  1  0.784  0.750  0.449  1.0
  O  O18  1  0.284  0.250  0.051  1.0
  O  O19  1  0.216  0.250  0.551  1.0
  O  O20  1  0.780  0.966  0.664  1.0
  O  O21  1  0.720  0.534  0.164  1.0
  O  O22  1  0.220  0.466  0.336  1.0
  O  O23  1  0.280  0.034  0.836  1.0
  O  O24  1  0.220  0.034  0.336  1.0
  O  O25  1  0.280  0.466  0.836  1.0
  O  O26  1  0.780  0.534  0.664  1.0
  O  O27  1  0.720  0.966  0.164  1.0
[/CIF]
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The crystal structure described by Zn2SiO4 is Spinel-like structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, edges with two equivalent Zn(2)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-64°. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(1)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Zn(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-64°. 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 two equivalent Zn(1)O6 octahedra, corners with four equivalent Zn(2)O6 octahedra,  an edgeedge with one Zn(2)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Zn(2), two equivalent Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Zn(2), two equivalent Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Zn(1), two equivalent Zn(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Zn2SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.850
_cell_length_b   6.099
_cell_length_c   10.438
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   308.739
_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  0.000  0.500  1.0
  Zn  Zn1  1  0.000  0.500  0.000  1.0
  Zn  Zn2  1  0.500  0.500  0.500  1.0
  Zn  Zn3  1  0.000  0.000  0.000  1.0
  Zn  Zn4  1  0.485  0.750  0.780  1.0
  Zn  Zn5  1  0.015  0.750  0.280  1.0
  Zn  Zn6  1  0.515  0.250  0.220  1.0
  Zn  Zn7  1  0.985  0.250  0.720  1.0
  Si  Si8  1  0.926  0.750  0.596  1.0
  Si  Si9  1  0.574  0.750  0.096  1.0
  Si  Si10  1  0.074  0.250  0.404  1.0
  Si  Si11  1  0.426  0.250  0.904  1.0
  O  O12  1  0.264  0.750  0.594  1.0
  O  O13  1  0.236  0.750  0.094  1.0
  O  O14  1  0.736  0.250  0.406  1.0
  O  O15  1  0.764  0.250  0.906  1.0
  O  O16  1  0.716  0.750  0.949  1.0
  O  O17  1  0.784  0.750  0.449  1.0
  O  O18  1  0.284  0.250  0.051  1.0
  O  O19  1  0.216  0.250  0.551  1.0
  O  O20  1  0.780  0.966  0.664  1.0
  O  O21  1  0.720  0.534  0.164  1.0
  O  O22  1  0.220  0.466  0.336  1.0
  O  O23  1  0.280  0.034  0.836  1.0
  O  O24  1  0.220  0.034  0.336  1.0
  O  O25  1  0.280  0.466  0.836  1.0
  O  O26  1  0.780  0.534  0.664  1.0
  O  O27  1  0.720  0.966  0.164  1.0
[/CIF]
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