The material structure described by Na2ZnSi2O6 crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. Zn(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share 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 two equivalent Zn(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded to two equivalent Na(1), one Zn(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONa2ZnSi trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Zn(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.643
_cell_length_b   5.643
_cell_length_c   9.876
_cell_angle_alpha   91.247
_cell_angle_beta   91.247
_cell_angle_gamma   114.527
_symmetry_Int_Tables_number   1
_cell_volume   285.857
_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
  Na  Na0  1  0.388  0.745  0.106  1.0
  Na  Na1  1  0.255  0.612  0.394  1.0
  Na  Na2  1  0.612  0.255  0.894  1.0
  Na  Na3  1  0.745  0.388  0.606  1.0
  Zn  Zn4  1  0.728  0.272  0.250  1.0
  Zn  Zn5  1  0.272  0.728  0.750  1.0
  Si  Si6  1  0.167  0.140  0.138  1.0
  Si  Si7  1  0.833  0.860  0.862  1.0
  Si  Si8  1  0.140  0.167  0.638  1.0
  Si  Si9  1  0.860  0.833  0.362  1.0
  O  O10  1  0.091  0.909  0.250  1.0
  O  O11  1  0.771  0.529  0.392  1.0
  O  O12  1  0.632  0.910  0.308  1.0
  O  O13  1  0.229  0.471  0.608  1.0
  O  O14  1  0.529  0.771  0.892  1.0
  O  O15  1  0.471  0.229  0.108  1.0
  O  O16  1  0.368  0.090  0.692  1.0
  O  O17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.910  0.632  0.808  1.0
  O  O19  1  0.090  0.368  0.192  1.0
  O  O20  1  0.909  0.091  0.750  1.0
  O  O21  1  0.000  0.000  0.000  1.0
[/CIF]
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The material structure described by Na2ZnSi2O6 crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. Zn(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share 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 two equivalent Zn(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded to two equivalent Na(1), one Zn(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONa2ZnSi trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Zn(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.643
_cell_length_b   5.643
_cell_length_c   9.876
_cell_angle_alpha   91.247
_cell_angle_beta   91.247
_cell_angle_gamma   114.527
_symmetry_Int_Tables_number   1
_cell_volume   285.857
_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
  Na  Na0  1  0.388  0.745  0.106  1.0
  Na  Na1  1  0.255  0.612  0.394  1.0
  Na  Na2  1  0.612  0.255  0.894  1.0
  Na  Na3  1  0.745  0.388  0.606  1.0
  Zn  Zn4  1  0.728  0.272  0.250  1.0
  Zn  Zn5  1  0.272  0.728  0.750  1.0
  Si  Si6  1  0.167  0.140  0.138  1.0
  Si  Si7  1  0.833  0.860  0.862  1.0
  Si  Si8  1  0.140  0.167  0.638  1.0
  Si  Si9  1  0.860  0.833  0.362  1.0
  O  O10  1  0.091  0.909  0.250  1.0
  O  O11  1  0.771  0.529  0.392  1.0
  O  O12  1  0.632  0.910  0.308  1.0
  O  O13  1  0.229  0.471  0.608  1.0
  O  O14  1  0.529  0.771  0.892  1.0
  O  O15  1  0.471  0.229  0.108  1.0
  O  O16  1  0.368  0.090  0.692  1.0
  O  O17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.910  0.632  0.808  1.0
  O  O19  1  0.090  0.368  0.192  1.0
  O  O20  1  0.909  0.091  0.750  1.0
  O  O21  1  0.000  0.000  0.000  1.0
[/CIF]
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