The crystal structure described by NaCd2(SiO3)3 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), one O(8), one O(9), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one O(2), one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form CdO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra,  an edgeedge with one Cd(1)O6 octahedra, and edges with three equivalent Cd(2)O6 octahedra. In the second Cd site, Cd(2) is bonded to one O(1), one O(5), one O(6), one O(8), and two equivalent O(2) atoms to form CdO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra,  an edgeedge with one Cd(2)O6 octahedra, and edges with three equivalent Cd(1)O6 octahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Cd(2)O6 octahedra, corners with three equivalent Cd(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Cd(1)O6 octahedra, corners with three equivalent Cd(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-66°. In the third Si site, Si(3) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra, corners with two equivalent Cd(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-59°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Cd(2), two equivalent Cd(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Cd(1), two equivalent Cd(2), and one Si(2) atom to form distorted edge-sharing OCd3Si tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one Cd(2), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Cd(1), one Cd(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Na(1), one Cd(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Cd(2), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_NaCd2(SiO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.034
_cell_length_b   7.061
_cell_length_c   7.953
_cell_angle_alpha   95.045
_cell_angle_beta   102.347
_cell_angle_gamma   90.492
_symmetry_Int_Tables_number   1
_cell_volume   384.213
_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  0.263  0.351  0.566  1.0
  Na  Na1  1  0.737  0.649  0.434  1.0
  Cd  Cd2  1  0.589  0.148  0.854  1.0
  Cd  Cd3  1  0.411  0.852  0.146  1.0
  Cd  Cd4  1  0.086  0.134  0.849  1.0
  Cd  Cd5  1  0.914  0.866  0.151  1.0
  Si  Si6  1  0.595  0.661  0.783  1.0
  Si  Si7  1  0.405  0.339  0.217  1.0
  Si  Si8  1  0.047  0.653  0.787  1.0
  Si  Si9  1  0.953  0.347  0.213  1.0
  Si  Si10  1  0.265  0.853  0.548  1.0
  Si  Si11  1  0.735  0.147  0.452  1.0
  O  O12  1  0.610  0.832  0.936  1.0
  O  O13  1  0.390  0.168  0.064  1.0
  O  O14  1  0.107  0.822  0.944  1.0
  O  O15  1  0.893  0.178  0.056  1.0
  O  O16  1  0.466  0.726  0.597  1.0
  O  O17  1  0.534  0.274  0.403  1.0
  O  O18  1  0.093  0.720  0.604  1.0
  O  O19  1  0.907  0.280  0.396  1.0
  O  O20  1  0.789  0.125  0.658  1.0
  O  O21  1  0.211  0.875  0.342  1.0
  O  O22  1  0.293  0.054  0.670  1.0
  O  O23  1  0.707  0.946  0.330  1.0
  O  O24  1  0.504  0.454  0.810  1.0
  O  O25  1  0.496  0.546  0.190  1.0
  O  O26  1  0.149  0.450  0.824  1.0
  O  O27  1  0.851  0.550  0.176  1.0
  O  O28  1  0.809  0.616  0.737  1.0
  O  O29  1  0.191  0.384  0.263  1.0
[/CIF]
.
The crystal structure described by NaCd2(SiO3)3 is Esseneite-like structured and crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), one O(8), one O(9), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one O(2), one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form CdO6 octahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra,  an edgeedge with one Cd(1)O6 octahedra, and edges with three equivalent Cd(2)O6 octahedra. In the second Cd site, Cd(2) is bonded to one O(1), one O(5), one O(6), one O(8), and two equivalent O(2) atoms to form CdO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra,  an edgeedge with one Cd(2)O6 octahedra, and edges with three equivalent Cd(1)O6 octahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Cd(2)O6 octahedra, corners with three equivalent Cd(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Cd(1)O6 octahedra, corners with three equivalent Cd(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-66°. In the third Si site, Si(3) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra, corners with two equivalent Cd(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-59°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Cd(2), two equivalent Cd(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Cd(1), two equivalent Cd(2), and one Si(2) atom to form distorted edge-sharing OCd3Si tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Si(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one Cd(2), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Cd(1), one Cd(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Na(1), one Cd(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Cd(2), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_NaCd2(SiO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.034
_cell_length_b   7.061
_cell_length_c   7.953
_cell_angle_alpha   95.045
_cell_angle_beta   102.347
_cell_angle_gamma   90.492
_symmetry_Int_Tables_number   1
_cell_volume   384.213
_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  0.263  0.351  0.566  1.0
  Na  Na1  1  0.737  0.649  0.434  1.0
  Cd  Cd2  1  0.589  0.148  0.854  1.0
  Cd  Cd3  1  0.411  0.852  0.146  1.0
  Cd  Cd4  1  0.086  0.134  0.849  1.0
  Cd  Cd5  1  0.914  0.866  0.151  1.0
  Si  Si6  1  0.595  0.661  0.783  1.0
  Si  Si7  1  0.405  0.339  0.217  1.0
  Si  Si8  1  0.047  0.653  0.787  1.0
  Si  Si9  1  0.953  0.347  0.213  1.0
  Si  Si10  1  0.265  0.853  0.548  1.0
  Si  Si11  1  0.735  0.147  0.452  1.0
  O  O12  1  0.610  0.832  0.936  1.0
  O  O13  1  0.390  0.168  0.064  1.0
  O  O14  1  0.107  0.822  0.944  1.0
  O  O15  1  0.893  0.178  0.056  1.0
  O  O16  1  0.466  0.726  0.597  1.0
  O  O17  1  0.534  0.274  0.403  1.0
  O  O18  1  0.093  0.720  0.604  1.0
  O  O19  1  0.907  0.280  0.396  1.0
  O  O20  1  0.789  0.125  0.658  1.0
  O  O21  1  0.211  0.875  0.342  1.0
  O  O22  1  0.293  0.054  0.670  1.0
  O  O23  1  0.707  0.946  0.330  1.0
  O  O24  1  0.504  0.454  0.810  1.0
  O  O25  1  0.496  0.546  0.190  1.0
  O  O26  1  0.149  0.450  0.824  1.0
  O  O27  1  0.851  0.550  0.176  1.0
  O  O28  1  0.809  0.616  0.737  1.0
  O  O29  1  0.191  0.384  0.263  1.0
[/CIF]
.