The structure described by Na2ZnSiO4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. 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 corners with four equivalent Na(2)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(2), two equivalent Na(1), one Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal pyramidal geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Na2ZnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.212
_cell_length_b   7.047
_cell_length_c   10.810
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   397.013
_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
  Na  Na0  1  0.252  0.498  0.091  1.0
  Na  Na1  1  0.711  0.745  0.158  1.0
  Na  Na2  1  0.211  0.245  0.342  1.0
  Na  Na3  1  0.789  0.745  0.658  1.0
  Na  Na4  1  0.748  0.998  0.909  1.0
  Na  Na5  1  0.248  0.498  0.591  1.0
  Na  Na6  1  0.752  0.998  0.409  1.0
  Na  Na7  1  0.289  0.245  0.842  1.0
  Zn  Zn8  1  0.703  0.248  0.157  1.0
  Zn  Zn9  1  0.297  0.748  0.843  1.0
  Zn  Zn10  1  0.797  0.248  0.657  1.0
  Zn  Zn11  1  0.203  0.748  0.343  1.0
  Si  Si12  1  0.198  0.996  0.094  1.0
  Si  Si13  1  0.302  0.996  0.594  1.0
  Si  Si14  1  0.802  0.496  0.906  1.0
  Si  Si15  1  0.698  0.496  0.406  1.0
  O  O16  1  0.266  0.972  0.947  1.0
  O  O17  1  0.734  0.472  0.053  1.0
  O  O18  1  0.234  0.972  0.447  1.0
  O  O19  1  0.766  0.472  0.553  1.0
  O  O20  1  0.719  0.304  0.831  1.0
  O  O21  1  0.281  0.804  0.169  1.0
  O  O22  1  0.781  0.304  0.331  1.0
  O  O23  1  0.219  0.804  0.669  1.0
  O  O24  1  0.887  0.022  0.108  1.0
  O  O25  1  0.113  0.522  0.892  1.0
  O  O26  1  0.613  0.022  0.608  1.0
  O  O27  1  0.165  0.188  0.646  1.0
  O  O28  1  0.665  0.688  0.854  1.0
  O  O29  1  0.335  0.188  0.146  1.0
  O  O30  1  0.835  0.688  0.354  1.0
  O  O31  1  0.387  0.522  0.392  1.0
[/CIF]
.
The structure described by Na2ZnSiO4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NaO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with four equivalent Na(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. 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 corners with four equivalent Na(2)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(2), two equivalent Na(1), one Zn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal pyramidal geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Zn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Na2ZnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.212
_cell_length_b   7.047
_cell_length_c   10.810
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   397.013
_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
  Na  Na0  1  0.252  0.498  0.091  1.0
  Na  Na1  1  0.711  0.745  0.158  1.0
  Na  Na2  1  0.211  0.245  0.342  1.0
  Na  Na3  1  0.789  0.745  0.658  1.0
  Na  Na4  1  0.748  0.998  0.909  1.0
  Na  Na5  1  0.248  0.498  0.591  1.0
  Na  Na6  1  0.752  0.998  0.409  1.0
  Na  Na7  1  0.289  0.245  0.842  1.0
  Zn  Zn8  1  0.703  0.248  0.157  1.0
  Zn  Zn9  1  0.297  0.748  0.843  1.0
  Zn  Zn10  1  0.797  0.248  0.657  1.0
  Zn  Zn11  1  0.203  0.748  0.343  1.0
  Si  Si12  1  0.198  0.996  0.094  1.0
  Si  Si13  1  0.302  0.996  0.594  1.0
  Si  Si14  1  0.802  0.496  0.906  1.0
  Si  Si15  1  0.698  0.496  0.406  1.0
  O  O16  1  0.266  0.972  0.947  1.0
  O  O17  1  0.734  0.472  0.053  1.0
  O  O18  1  0.234  0.972  0.447  1.0
  O  O19  1  0.766  0.472  0.553  1.0
  O  O20  1  0.719  0.304  0.831  1.0
  O  O21  1  0.281  0.804  0.169  1.0
  O  O22  1  0.781  0.304  0.331  1.0
  O  O23  1  0.219  0.804  0.669  1.0
  O  O24  1  0.887  0.022  0.108  1.0
  O  O25  1  0.113  0.522  0.892  1.0
  O  O26  1  0.613  0.022  0.608  1.0
  O  O27  1  0.165  0.188  0.646  1.0
  O  O28  1  0.665  0.688  0.854  1.0
  O  O29  1  0.335  0.188  0.146  1.0
  O  O30  1  0.835  0.688  0.354  1.0
  O  O31  1  0.387  0.522  0.392  1.0
[/CIF]
.