The crystal structure described by CaZn2(SiO4)2 crystallizes in the orthorhombic Ama2 space group. Ca(1) is bonded to one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form CaO6 octahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with six equivalent Si(1)O4 tetrahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 68°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. 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 three equivalent Ca(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-62°. There are five inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one Ca(1) and two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a single-bond geometry to one Ca(1) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Ca(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Ca(1), one Zn(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_CaZn2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.333
_cell_length_b   5.333
_cell_length_c   12.748
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.673
_symmetry_Int_Tables_number   1
_cell_volume   345.432
_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
  Ca  Ca0  1  0.862  0.653  0.250  1.0
  Ca  Ca1  1  0.347  0.138  0.750  1.0
  Zn  Zn2  1  1.000  0.000  0.500  1.0
  Zn  Zn3  1  1.000  0.000  0.000  1.0
  Zn  Zn4  1  0.492  0.508  0.500  1.0
  Zn  Zn5  1  0.492  0.508  0.000  1.0
  Si  Si6  1  0.494  0.025  0.367  1.0
  Si  Si7  1  0.975  0.506  0.633  1.0
  Si  Si8  1  0.494  0.025  0.133  1.0
  Si  Si9  1  0.975  0.506  0.867  1.0
  O  O10  1  0.630  0.877  0.455  1.0
  O  O11  1  0.123  0.370  0.545  1.0
  O  O12  1  0.630  0.877  0.045  1.0
  O  O13  1  0.123  0.370  0.955  1.0
  O  O14  1  0.609  0.345  0.376  1.0
  O  O15  1  0.655  0.391  0.624  1.0
  O  O16  1  0.609  0.345  0.124  1.0
  O  O17  1  0.655  0.391  0.876  1.0
  O  O18  1  0.173  0.909  0.375  1.0
  O  O19  1  0.091  0.827  0.625  1.0
  O  O20  1  0.173  0.909  0.125  1.0
  O  O21  1  0.091  0.827  0.875  1.0
  O  O22  1  0.584  0.935  0.250  1.0
  O  O23  1  0.065  0.416  0.750  1.0
  O  O24  1  0.121  0.342  0.250  1.0
  O  O25  1  0.658  0.879  0.750  1.0
[/CIF]
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The crystal structure described by CaZn2(SiO4)2 crystallizes in the orthorhombic Ama2 space group. Ca(1) is bonded to one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form CaO6 octahedra that share corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with six equivalent Si(1)O4 tetrahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 68°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. 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 three equivalent Ca(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-62°. There are five inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one Ca(1) and two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a single-bond geometry to one Ca(1) atom. In the third O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Ca(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Ca(1), one Zn(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_CaZn2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.333
_cell_length_b   5.333
_cell_length_c   12.748
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.673
_symmetry_Int_Tables_number   1
_cell_volume   345.432
_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
  Ca  Ca0  1  0.862  0.653  0.250  1.0
  Ca  Ca1  1  0.347  0.138  0.750  1.0
  Zn  Zn2  1  1.000  0.000  0.500  1.0
  Zn  Zn3  1  1.000  0.000  0.000  1.0
  Zn  Zn4  1  0.492  0.508  0.500  1.0
  Zn  Zn5  1  0.492  0.508  0.000  1.0
  Si  Si6  1  0.494  0.025  0.367  1.0
  Si  Si7  1  0.975  0.506  0.633  1.0
  Si  Si8  1  0.494  0.025  0.133  1.0
  Si  Si9  1  0.975  0.506  0.867  1.0
  O  O10  1  0.630  0.877  0.455  1.0
  O  O11  1  0.123  0.370  0.545  1.0
  O  O12  1  0.630  0.877  0.045  1.0
  O  O13  1  0.123  0.370  0.955  1.0
  O  O14  1  0.609  0.345  0.376  1.0
  O  O15  1  0.655  0.391  0.624  1.0
  O  O16  1  0.609  0.345  0.124  1.0
  O  O17  1  0.655  0.391  0.876  1.0
  O  O18  1  0.173  0.909  0.375  1.0
  O  O19  1  0.091  0.827  0.625  1.0
  O  O20  1  0.173  0.909  0.125  1.0
  O  O21  1  0.091  0.827  0.875  1.0
  O  O22  1  0.584  0.935  0.250  1.0
  O  O23  1  0.065  0.416  0.750  1.0
  O  O24  1  0.121  0.342  0.250  1.0
  O  O25  1  0.658  0.879  0.750  1.0
[/CIF]
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