The structure described by NaMg3Al6B3Si6O31 crystallizes in the trigonal R3m space group. Na(1) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(4), and three equivalent O(5) atoms. Mg(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. Al(1) is bonded to one O(3), one O(6), two equivalent O(7), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 40°. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(8) atoms. Si(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with three equivalent Al(1)O6 octahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-58°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to one Na(1) and two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a 2-coordinate geometry to one Na(1) and two equivalent Si(1) atoms. In the third O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Al(1), and one Si(1) atom. In the fourth O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one Si(1) atom. In the fifth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(1) atom. In the sixth O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. In the seventh O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Mg(1), and one B(1) atom. In the eighth O site, O(3) is bonded in a T-shaped geometry to one Mg(1) and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_NaMg3Al6Si6B3O31
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.630
_cell_length_b   9.630
_cell_length_c   9.630
_cell_angle_alpha   113.861
_cell_angle_beta   113.861
_cell_angle_gamma   113.861
_symmetry_Int_Tables_number   1
_cell_volume   548.124
_cell_formula_units_Z   1
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  0.768  0.768  0.768  1.0
  Mg  Mg1  1  0.281  0.090  0.090  1.0
  Mg  Mg2  1  0.090  0.281  0.090  1.0
  Mg  Mg3  1  0.090  0.090  0.281  1.0
  Al  Al4  1  0.882  0.107  0.444  1.0
  Al  Al5  1  0.444  0.882  0.107  1.0
  Al  Al6  1  0.107  0.444  0.882  1.0
  Al  Al7  1  0.444  0.107  0.882  1.0
  Al  Al8  1  0.882  0.444  0.107  1.0
  Al  Al9  1  0.107  0.882  0.444  1.0
  Si  Si10  1  0.722  0.528  0.339  1.0
  Si  Si11  1  0.339  0.722  0.528  1.0
  Si  Si12  1  0.528  0.339  0.722  1.0
  Si  Si13  1  0.339  0.528  0.722  1.0
  Si  Si14  1  0.722  0.339  0.528  1.0
  Si  Si15  1  0.528  0.722  0.339  1.0
  B  B16  1  0.096  0.096  0.766  1.0
  B  B17  1  0.766  0.096  0.096  1.0
  B  B18  1  0.096  0.766  0.096  1.0
  O  O19  1  0.294  0.294  0.294  1.0
  O  O20  1  0.067  0.067  0.883  1.0
  O  O21  1  0.883  0.067  0.067  1.0
  O  O22  1  0.067  0.883  0.067  1.0
  O  O23  1  0.342  0.936  0.936  1.0
  O  O24  1  0.936  0.342  0.936  1.0
  O  O25  1  0.936  0.936  0.342  1.0
  O  O26  1  0.692  0.692  0.410  1.0
  O  O27  1  0.410  0.692  0.692  1.0
  O  O28  1  0.692  0.410  0.692  1.0
  O  O29  1  0.796  0.522  0.522  1.0
  O  O30  1  0.522  0.796  0.522  1.0
  O  O31  1  0.522  0.522  0.796  1.0
  O  O32  1  0.506  0.299  0.116  1.0
  O  O33  1  0.116  0.506  0.299  1.0
  O  O34  1  0.299  0.116  0.506  1.0
  O  O35  1  0.116  0.299  0.506  1.0
  O  O36  1  0.506  0.116  0.299  1.0
  O  O37  1  0.299  0.506  0.116  1.0
  O  O38  1  0.898  0.614  0.328  1.0
  O  O39  1  0.328  0.898  0.614  1.0
  O  O40  1  0.614  0.328  0.898  1.0
  O  O41  1  0.328  0.614  0.898  1.0
  O  O42  1  0.898  0.328  0.614  1.0
  O  O43  1  0.614  0.898  0.328  1.0
  O  O44  1  0.037  0.187  0.707  1.0
  O  O45  1  0.707  0.037  0.187  1.0
  O  O46  1  0.187  0.707  0.037  1.0
  O  O47  1  0.707  0.187  0.037  1.0
  O  O48  1  0.037  0.707  0.187  1.0
  O  O49  1  0.187  0.037  0.707  1.0
[/CIF]
.
The structure described by NaMg3Al6B3Si6O31 crystallizes in the trigonal R3m space group. Na(1) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(4), and three equivalent O(5) atoms. Mg(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(6) atoms to form MgO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. Al(1) is bonded to one O(3), one O(6), two equivalent O(7), and two equivalent O(8) atoms to form AlO6 octahedra that share  a cornercorner with one Al(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 40°. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(8) atoms. Si(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with three equivalent Al(1)O6 octahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-58°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to one Na(1) and two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a 2-coordinate geometry to one Na(1) and two equivalent Si(1) atoms. In the third O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Al(1), and one Si(1) atom. In the fourth O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one Si(1) atom. In the fifth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one B(1) atom. In the sixth O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Mg(1) atoms. In the seventh O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Mg(1), and one B(1) atom. In the eighth O site, O(3) is bonded in a T-shaped geometry to one Mg(1) and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_NaMg3Al6Si6B3O31
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.630
_cell_length_b   9.630
_cell_length_c   9.630
_cell_angle_alpha   113.861
_cell_angle_beta   113.861
_cell_angle_gamma   113.861
_symmetry_Int_Tables_number   1
_cell_volume   548.124
_cell_formula_units_Z   1
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  0.768  0.768  0.768  1.0
  Mg  Mg1  1  0.281  0.090  0.090  1.0
  Mg  Mg2  1  0.090  0.281  0.090  1.0
  Mg  Mg3  1  0.090  0.090  0.281  1.0
  Al  Al4  1  0.882  0.107  0.444  1.0
  Al  Al5  1  0.444  0.882  0.107  1.0
  Al  Al6  1  0.107  0.444  0.882  1.0
  Al  Al7  1  0.444  0.107  0.882  1.0
  Al  Al8  1  0.882  0.444  0.107  1.0
  Al  Al9  1  0.107  0.882  0.444  1.0
  Si  Si10  1  0.722  0.528  0.339  1.0
  Si  Si11  1  0.339  0.722  0.528  1.0
  Si  Si12  1  0.528  0.339  0.722  1.0
  Si  Si13  1  0.339  0.528  0.722  1.0
  Si  Si14  1  0.722  0.339  0.528  1.0
  Si  Si15  1  0.528  0.722  0.339  1.0
  B  B16  1  0.096  0.096  0.766  1.0
  B  B17  1  0.766  0.096  0.096  1.0
  B  B18  1  0.096  0.766  0.096  1.0
  O  O19  1  0.294  0.294  0.294  1.0
  O  O20  1  0.067  0.067  0.883  1.0
  O  O21  1  0.883  0.067  0.067  1.0
  O  O22  1  0.067  0.883  0.067  1.0
  O  O23  1  0.342  0.936  0.936  1.0
  O  O24  1  0.936  0.342  0.936  1.0
  O  O25  1  0.936  0.936  0.342  1.0
  O  O26  1  0.692  0.692  0.410  1.0
  O  O27  1  0.410  0.692  0.692  1.0
  O  O28  1  0.692  0.410  0.692  1.0
  O  O29  1  0.796  0.522  0.522  1.0
  O  O30  1  0.522  0.796  0.522  1.0
  O  O31  1  0.522  0.522  0.796  1.0
  O  O32  1  0.506  0.299  0.116  1.0
  O  O33  1  0.116  0.506  0.299  1.0
  O  O34  1  0.299  0.116  0.506  1.0
  O  O35  1  0.116  0.299  0.506  1.0
  O  O36  1  0.506  0.116  0.299  1.0
  O  O37  1  0.299  0.506  0.116  1.0
  O  O38  1  0.898  0.614  0.328  1.0
  O  O39  1  0.328  0.898  0.614  1.0
  O  O40  1  0.614  0.328  0.898  1.0
  O  O41  1  0.328  0.614  0.898  1.0
  O  O42  1  0.898  0.328  0.614  1.0
  O  O43  1  0.614  0.898  0.328  1.0
  O  O44  1  0.037  0.187  0.707  1.0
  O  O45  1  0.707  0.037  0.187  1.0
  O  O46  1  0.187  0.707  0.037  1.0
  O  O47  1  0.707  0.187  0.037  1.0
  O  O48  1  0.037  0.707  0.187  1.0
  O  O49  1  0.187  0.037  0.707  1.0
[/CIF]
.