The compound described by Na4Cd2Si3O10 crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form distorted NaO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra, corners with three equivalent Cd(1)O5 trigonal bipyramids,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O5 trigonal bipyramid. Cd(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form CdO5 trigonal bipyramids that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra, corners with four equivalent Si(2)O4 tetrahedra,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O5 trigonal bipyramid. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with two equivalent Cd(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Cd(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Cd(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 Cd(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Cd(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Cd(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Cd2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.829
_cell_length_b   5.829
_cell_length_c   17.906
_cell_angle_alpha   81.536
_cell_angle_beta   81.536
_cell_angle_gamma   61.078
_symmetry_Int_Tables_number   1
_cell_volume   524.767
_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  0.221  0.432  0.244  1.0
  Na  Na1  1  0.432  0.221  0.744  1.0
  Na  Na2  1  0.779  0.568  0.756  1.0
  Na  Na3  1  0.683  0.825  0.940  1.0
  Na  Na4  1  0.568  0.779  0.256  1.0
  Na  Na5  1  0.175  0.317  0.560  1.0
  Na  Na6  1  0.317  0.175  0.060  1.0
  Na  Na7  1  0.825  0.683  0.440  1.0
  Cd  Cd8  1  0.000  0.804  0.085  1.0
  Cd  Cd9  1  0.804  0.000  0.585  1.0
  Cd  Cd10  1  0.196  1.000  0.415  1.0
  Cd  Cd11  1  1.000  0.196  0.915  1.0
  Si  Si12  1  0.881  0.119  0.250  1.0
  Si  Si13  1  0.330  0.540  0.898  1.0
  Si  Si14  1  0.460  0.670  0.602  1.0
  Si  Si15  1  0.670  0.460  0.102  1.0
  Si  Si16  1  0.119  0.881  0.750  1.0
  Si  Si17  1  0.540  0.330  0.398  1.0
  O  O18  1  0.205  0.615  0.813  1.0
  O  O19  1  0.084  0.135  0.787  1.0
  O  O20  1  0.613  0.541  0.885  1.0
  O  O21  1  0.541  0.613  0.385  1.0
  O  O22  1  0.770  0.108  0.452  1.0
  O  O23  1  0.749  0.646  0.573  1.0
  O  O24  1  0.135  0.084  0.287  1.0
  O  O25  1  0.385  0.795  0.687  1.0
  O  O26  1  0.615  0.205  0.313  1.0
  O  O27  1  0.108  0.770  0.952  1.0
  O  O28  1  0.354  0.251  0.927  1.0
  O  O29  1  0.795  0.385  0.187  1.0
  O  O30  1  0.916  0.865  0.213  1.0
  O  O31  1  0.251  0.354  0.427  1.0
  O  O32  1  0.892  0.230  0.048  1.0
  O  O33  1  0.646  0.749  0.073  1.0
  O  O34  1  0.230  0.892  0.548  1.0
  O  O35  1  0.865  0.916  0.713  1.0
  O  O36  1  0.387  0.459  0.115  1.0
  O  O37  1  0.459  0.387  0.615  1.0
[/CIF]
.
The compound described by Na4Cd2Si3O10 crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form distorted NaO4 tetrahedra that share corners with four equivalent Si(2)O4 tetrahedra, corners with three equivalent Cd(1)O5 trigonal bipyramids,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O5 trigonal bipyramid. Cd(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form CdO5 trigonal bipyramids that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra, corners with four equivalent Si(2)O4 tetrahedra,  an edgeedge with one Na(2)O4 tetrahedra, and  an edgeedge with one Cd(1)O5 trigonal bipyramid. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with two equivalent Cd(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, and corners with four equivalent Cd(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one Cd(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 Cd(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Cd(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Cd(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Cd2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.829
_cell_length_b   5.829
_cell_length_c   17.906
_cell_angle_alpha   81.536
_cell_angle_beta   81.536
_cell_angle_gamma   61.078
_symmetry_Int_Tables_number   1
_cell_volume   524.767
_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  0.221  0.432  0.244  1.0
  Na  Na1  1  0.432  0.221  0.744  1.0
  Na  Na2  1  0.779  0.568  0.756  1.0
  Na  Na3  1  0.683  0.825  0.940  1.0
  Na  Na4  1  0.568  0.779  0.256  1.0
  Na  Na5  1  0.175  0.317  0.560  1.0
  Na  Na6  1  0.317  0.175  0.060  1.0
  Na  Na7  1  0.825  0.683  0.440  1.0
  Cd  Cd8  1  0.000  0.804  0.085  1.0
  Cd  Cd9  1  0.804  0.000  0.585  1.0
  Cd  Cd10  1  0.196  1.000  0.415  1.0
  Cd  Cd11  1  1.000  0.196  0.915  1.0
  Si  Si12  1  0.881  0.119  0.250  1.0
  Si  Si13  1  0.330  0.540  0.898  1.0
  Si  Si14  1  0.460  0.670  0.602  1.0
  Si  Si15  1  0.670  0.460  0.102  1.0
  Si  Si16  1  0.119  0.881  0.750  1.0
  Si  Si17  1  0.540  0.330  0.398  1.0
  O  O18  1  0.205  0.615  0.813  1.0
  O  O19  1  0.084  0.135  0.787  1.0
  O  O20  1  0.613  0.541  0.885  1.0
  O  O21  1  0.541  0.613  0.385  1.0
  O  O22  1  0.770  0.108  0.452  1.0
  O  O23  1  0.749  0.646  0.573  1.0
  O  O24  1  0.135  0.084  0.287  1.0
  O  O25  1  0.385  0.795  0.687  1.0
  O  O26  1  0.615  0.205  0.313  1.0
  O  O27  1  0.108  0.770  0.952  1.0
  O  O28  1  0.354  0.251  0.927  1.0
  O  O29  1  0.795  0.385  0.187  1.0
  O  O30  1  0.916  0.865  0.213  1.0
  O  O31  1  0.251  0.354  0.427  1.0
  O  O32  1  0.892  0.230  0.048  1.0
  O  O33  1  0.646  0.749  0.073  1.0
  O  O34  1  0.230  0.892  0.548  1.0
  O  O35  1  0.865  0.916  0.713  1.0
  O  O36  1  0.387  0.459  0.115  1.0
  O  O37  1  0.459  0.387  0.615  1.0
[/CIF]
.