The compound described by Na2CaSiO4 crystallizes in the cubic P2_13 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal planar geometry to six equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent O(2) atoms. Ca(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ca(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Ca(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2CaSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.541
_cell_length_b   7.541
_cell_length_c   7.541
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   428.874
_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  0.993  0.007  0.507  1.0
  Na  Na1  1  0.225  0.775  0.275  1.0
  Na  Na2  1  0.725  0.725  0.725  1.0
  Na  Na3  1  0.007  0.507  0.993  1.0
  Na  Na4  1  0.493  0.493  0.493  1.0
  Na  Na5  1  0.775  0.275  0.225  1.0
  Na  Na6  1  0.507  0.993  0.007  1.0
  Na  Na7  1  0.275  0.225  0.775  1.0
  Ca  Ca8  1  0.038  0.462  0.538  1.0
  Ca  Ca9  1  0.962  0.962  0.962  1.0
  Ca  Ca10  1  0.462  0.538  0.038  1.0
  Ca  Ca11  1  0.538  0.038  0.462  1.0
  Si  Si12  1  0.258  0.258  0.258  1.0
  Si  Si13  1  0.742  0.758  0.242  1.0
  Si  Si14  1  0.242  0.742  0.758  1.0
  Si  Si15  1  0.758  0.242  0.742  1.0
  O  O16  1  0.866  0.634  0.366  1.0
  O  O17  1  0.471  0.235  0.210  1.0
  O  O18  1  0.765  0.710  0.029  1.0
  O  O19  1  0.235  0.210  0.471  1.0
  O  O20  1  0.134  0.134  0.134  1.0
  O  O21  1  0.971  0.265  0.790  1.0
  O  O22  1  0.029  0.765  0.710  1.0
  O  O23  1  0.529  0.735  0.290  1.0
  O  O24  1  0.634  0.366  0.866  1.0
  O  O25  1  0.790  0.971  0.265  1.0
  O  O26  1  0.290  0.529  0.735  1.0
  O  O27  1  0.710  0.029  0.765  1.0
  O  O28  1  0.366  0.866  0.634  1.0
  O  O29  1  0.265  0.790  0.971  1.0
  O  O30  1  0.210  0.471  0.235  1.0
  O  O31  1  0.735  0.290  0.529  1.0
[/CIF]
.
The compound described by Na2CaSiO4 crystallizes in the cubic P2_13 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal planar geometry to six equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent O(2) atoms. Ca(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ca(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Ca(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2CaSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.541
_cell_length_b   7.541
_cell_length_c   7.541
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   428.874
_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  0.993  0.007  0.507  1.0
  Na  Na1  1  0.225  0.775  0.275  1.0
  Na  Na2  1  0.725  0.725  0.725  1.0
  Na  Na3  1  0.007  0.507  0.993  1.0
  Na  Na4  1  0.493  0.493  0.493  1.0
  Na  Na5  1  0.775  0.275  0.225  1.0
  Na  Na6  1  0.507  0.993  0.007  1.0
  Na  Na7  1  0.275  0.225  0.775  1.0
  Ca  Ca8  1  0.038  0.462  0.538  1.0
  Ca  Ca9  1  0.962  0.962  0.962  1.0
  Ca  Ca10  1  0.462  0.538  0.038  1.0
  Ca  Ca11  1  0.538  0.038  0.462  1.0
  Si  Si12  1  0.258  0.258  0.258  1.0
  Si  Si13  1  0.742  0.758  0.242  1.0
  Si  Si14  1  0.242  0.742  0.758  1.0
  Si  Si15  1  0.758  0.242  0.742  1.0
  O  O16  1  0.866  0.634  0.366  1.0
  O  O17  1  0.471  0.235  0.210  1.0
  O  O18  1  0.765  0.710  0.029  1.0
  O  O19  1  0.235  0.210  0.471  1.0
  O  O20  1  0.134  0.134  0.134  1.0
  O  O21  1  0.971  0.265  0.790  1.0
  O  O22  1  0.029  0.765  0.710  1.0
  O  O23  1  0.529  0.735  0.290  1.0
  O  O24  1  0.634  0.366  0.866  1.0
  O  O25  1  0.790  0.971  0.265  1.0
  O  O26  1  0.290  0.529  0.735  1.0
  O  O27  1  0.710  0.029  0.765  1.0
  O  O28  1  0.366  0.866  0.634  1.0
  O  O29  1  0.265  0.790  0.971  1.0
  O  O30  1  0.210  0.471  0.235  1.0
  O  O31  1  0.735  0.290  0.529  1.0
[/CIF]
.