The compound described by Na3Ga3Si3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(6) atoms. Ga(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GaO4 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 four equivalent Ga(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to three equivalent O(6) atoms. In the second O site, O(6) is bonded in a T-shaped geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one Si(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3Ga3Si3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.030
_cell_length_b   9.030
_cell_length_c   9.030
_cell_angle_alpha   90.523
_cell_angle_beta   90.523
_cell_angle_gamma   90.523
_symmetry_Int_Tables_number   1
_cell_volume   736.121
_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  0.317  0.684  0.312  1.0
  Na  Na1  1  0.684  0.312  0.317  1.0
  Na  Na2  1  0.312  0.317  0.684  1.0
  Na  Na3  1  0.184  0.817  0.812  1.0
  Na  Na4  1  0.812  0.184  0.817  1.0
  Na  Na5  1  0.817  0.812  0.184  1.0
  Ga  Ga6  1  0.506  0.756  0.993  1.0
  Ga  Ga7  1  0.993  0.506  0.756  1.0
  Ga  Ga8  1  0.756  0.993  0.506  1.0
  Ga  Ga9  1  0.006  0.493  0.256  1.0
  Ga  Ga10  1  0.256  0.006  0.493  1.0
  Ga  Ga11  1  0.493  0.256  0.006  1.0
  Si  Si12  1  0.005  0.751  0.503  1.0
  Si  Si13  1  0.503  0.005  0.751  1.0
  Si  Si14  1  0.751  0.503  0.005  1.0
  Si  Si15  1  0.505  0.003  0.251  1.0
  Si  Si16  1  0.251  0.505  0.003  1.0
  Si  Si17  1  0.003  0.251  0.505  1.0
  O  O18  1  0.662  0.643  0.941  1.0
  O  O19  1  0.941  0.662  0.643  1.0
  O  O20  1  0.643  0.941  0.662  1.0
  O  O21  1  0.355  0.641  0.065  1.0
  O  O22  1  0.074  0.648  0.372  1.0
  O  O23  1  0.373  0.928  0.348  1.0
  O  O24  1  0.648  0.372  0.074  1.0
  O  O25  1  0.928  0.348  0.373  1.0
  O  O26  1  0.641  0.065  0.355  1.0
  O  O27  1  0.348  0.373  0.928  1.0
  O  O28  1  0.065  0.355  0.641  1.0
  O  O29  1  0.372  0.074  0.648  1.0
  O  O30  1  0.148  0.574  0.872  1.0
  O  O31  1  0.428  0.873  0.848  1.0
  O  O32  1  0.141  0.855  0.565  1.0
  O  O33  1  0.848  0.428  0.873  1.0
  O  O34  1  0.565  0.141  0.855  1.0
  O  O35  1  0.872  0.148  0.574  1.0
  O  O36  1  0.162  0.441  0.143  1.0
  O  O37  1  0.441  0.143  0.162  1.0
  O  O38  1  0.143  0.162  0.441  1.0
  O  O39  1  0.855  0.565  0.141  1.0
  O  O40  1  0.574  0.872  0.148  1.0
  O  O41  1  0.873  0.848  0.428  1.0
  O  O42  1  0.998  0.998  0.998  1.0
  O  O43  1  0.056  0.873  0.050  1.0
  O  O44  1  0.873  0.050  0.056  1.0
  O  O45  1  0.050  0.056  0.873  1.0
  O  O46  1  0.373  0.556  0.550  1.0
  O  O47  1  0.550  0.373  0.556  1.0
  O  O48  1  0.498  0.498  0.498  1.0
  O  O49  1  0.556  0.550  0.373  1.0
[/CIF]
.
The compound described by Na3Ga3Si3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(6) atoms. Ga(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GaO4 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 four equivalent Ga(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to three equivalent O(6) atoms. In the second O site, O(6) is bonded in a T-shaped geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one Si(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3Ga3Si3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.030
_cell_length_b   9.030
_cell_length_c   9.030
_cell_angle_alpha   90.523
_cell_angle_beta   90.523
_cell_angle_gamma   90.523
_symmetry_Int_Tables_number   1
_cell_volume   736.121
_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  0.317  0.684  0.312  1.0
  Na  Na1  1  0.684  0.312  0.317  1.0
  Na  Na2  1  0.312  0.317  0.684  1.0
  Na  Na3  1  0.184  0.817  0.812  1.0
  Na  Na4  1  0.812  0.184  0.817  1.0
  Na  Na5  1  0.817  0.812  0.184  1.0
  Ga  Ga6  1  0.506  0.756  0.993  1.0
  Ga  Ga7  1  0.993  0.506  0.756  1.0
  Ga  Ga8  1  0.756  0.993  0.506  1.0
  Ga  Ga9  1  0.006  0.493  0.256  1.0
  Ga  Ga10  1  0.256  0.006  0.493  1.0
  Ga  Ga11  1  0.493  0.256  0.006  1.0
  Si  Si12  1  0.005  0.751  0.503  1.0
  Si  Si13  1  0.503  0.005  0.751  1.0
  Si  Si14  1  0.751  0.503  0.005  1.0
  Si  Si15  1  0.505  0.003  0.251  1.0
  Si  Si16  1  0.251  0.505  0.003  1.0
  Si  Si17  1  0.003  0.251  0.505  1.0
  O  O18  1  0.662  0.643  0.941  1.0
  O  O19  1  0.941  0.662  0.643  1.0
  O  O20  1  0.643  0.941  0.662  1.0
  O  O21  1  0.355  0.641  0.065  1.0
  O  O22  1  0.074  0.648  0.372  1.0
  O  O23  1  0.373  0.928  0.348  1.0
  O  O24  1  0.648  0.372  0.074  1.0
  O  O25  1  0.928  0.348  0.373  1.0
  O  O26  1  0.641  0.065  0.355  1.0
  O  O27  1  0.348  0.373  0.928  1.0
  O  O28  1  0.065  0.355  0.641  1.0
  O  O29  1  0.372  0.074  0.648  1.0
  O  O30  1  0.148  0.574  0.872  1.0
  O  O31  1  0.428  0.873  0.848  1.0
  O  O32  1  0.141  0.855  0.565  1.0
  O  O33  1  0.848  0.428  0.873  1.0
  O  O34  1  0.565  0.141  0.855  1.0
  O  O35  1  0.872  0.148  0.574  1.0
  O  O36  1  0.162  0.441  0.143  1.0
  O  O37  1  0.441  0.143  0.162  1.0
  O  O38  1  0.143  0.162  0.441  1.0
  O  O39  1  0.855  0.565  0.141  1.0
  O  O40  1  0.574  0.872  0.148  1.0
  O  O41  1  0.873  0.848  0.428  1.0
  O  O42  1  0.998  0.998  0.998  1.0
  O  O43  1  0.056  0.873  0.050  1.0
  O  O44  1  0.873  0.050  0.056  1.0
  O  O45  1  0.050  0.056  0.873  1.0
  O  O46  1  0.373  0.556  0.550  1.0
  O  O47  1  0.550  0.373  0.556  1.0
  O  O48  1  0.498  0.498  0.498  1.0
  O  O49  1  0.556  0.550  0.373  1.0
[/CIF]
.