The material described by Na4GaAl2Si3O12Br crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one Br(1) atom to form NaBrO3 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(4), one O(5), one O(6), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(7), one O(8), one O(9), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(12), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. Ga(1) is bonded to one O(1), one O(10), one O(3), and one O(6) atom to form GaO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Na(1)BrO3 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(2), one O(5), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(12), one O(4), one O(7), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Na(3)BrO3 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(11), one O(2), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Na(1)BrO3 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(12), one O(3), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Na(3)BrO3 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(2), one Al(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(2), one Ga(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(3), one Al(2), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Na(3), one Al(1), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(3), one Al(2), and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Na(4), one Ga(1), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Na(4), one Al(1), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(4), one Al(2), and one Si(2) atom. Br(1) is bonded in a tetrahedral geometry to one Na(1), one Na(2), one Na(3), and one Na(4) atom. is represented by the CIF card [CIF]
data_Na4Al2GaSi3BrO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.059
_cell_length_b   9.059
_cell_length_c   9.056
_cell_angle_alpha   89.998
_cell_angle_beta   89.998
_cell_angle_gamma   89.991
_symmetry_Int_Tables_number   1
_cell_volume   743.197
_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  0.685  0.816  0.316  1.0
  Na  Na1  1  0.685  0.183  0.685  1.0
  Na  Na2  1  0.315  0.184  0.315  1.0
  Na  Na3  1  0.315  0.815  0.684  1.0
  Na  Na4  1  0.816  0.685  0.816  1.0
  Na  Na5  1  0.183  0.685  0.185  1.0
  Na  Na6  1  0.184  0.315  0.815  1.0
  Na  Na7  1  0.815  0.315  0.184  1.0
  Al  Al8  1  0.000  0.000  0.250  1.0
  Al  Al9  1  0.500  0.249  1.000  1.0
  Al  Al10  1  0.000  0.000  0.750  1.0
  Al  Al11  1  0.249  0.500  0.500  1.0
  Ga  Ga12  1  0.751  0.500  0.500  1.0
  Ga  Ga13  1  0.500  0.751  0.000  1.0
  Si  Si14  1  0.752  0.002  0.000  1.0
  Si  Si15  1  0.002  0.752  0.500  1.0
  Si  Si16  1  0.498  0.498  0.250  1.0
  Si  Si17  1  0.002  0.248  0.500  1.0
  Si  Si18  1  0.498  0.498  0.750  1.0
  Si  Si19  1  0.248  0.002  1.000  1.0
  Br  Br20  1  0.500  0.000  0.500  1.0
  Br  Br21  1  0.000  0.500  1.000  1.0
  O  O22  1  0.657  0.862  0.065  1.0
  O  O23  1  0.943  0.850  0.359  1.0
  O  O24  1  0.639  0.564  0.343  1.0
  O  O25  1  0.650  0.140  0.942  1.0
  O  O26  1  0.943  0.150  0.640  1.0
  O  O27  1  0.637  0.431  0.654  1.0
  O  O28  1  0.350  0.140  0.058  1.0
  O  O29  1  0.061  0.148  0.361  1.0
  O  O30  1  0.360  0.438  0.352  1.0
  O  O31  1  0.343  0.862  0.935  1.0
  O  O32  1  0.061  0.852  0.639  1.0
  O  O33  1  0.359  0.557  0.650  1.0
  O  O34  1  0.862  0.657  0.565  1.0
  O  O35  1  0.850  0.943  0.859  1.0
  O  O36  1  0.564  0.639  0.843  1.0
  O  O37  1  0.140  0.650  0.442  1.0
  O  O38  1  0.150  0.943  0.140  1.0
  O  O39  1  0.431  0.637  0.154  1.0
  O  O40  1  0.140  0.350  0.558  1.0
  O  O41  1  0.148  0.061  0.861  1.0
  O  O42  1  0.438  0.360  0.852  1.0
  O  O43  1  0.862  0.343  0.435  1.0
  O  O44  1  0.852  0.061  0.139  1.0
  O  O45  1  0.557  0.359  0.150  1.0
[/CIF]
.
The material described by Na4GaAl2Si3O12Br crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one Br(1) atom to form NaBrO3 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(4), one O(5), one O(6), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(7), one O(8), one O(9), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(12), and one Br(1) atom to form distorted NaBrO3 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. Ga(1) is bonded to one O(1), one O(10), one O(3), and one O(6) atom to form GaO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Na(1)BrO3 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(2), one O(5), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(12), one O(4), one O(7), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Na(3)BrO3 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(11), one O(2), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Na(1)BrO3 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(12), one O(3), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)BrO3 tetrahedra,  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(3)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra, corners with two equivalent Ga(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)BrO3 tetrahedra,  a cornercorner with one Na(4)BrO3 tetrahedra,  a cornercorner with one Ga(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Na(3)BrO3 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(2), one Al(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(2), one Ga(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(3), one Al(2), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Na(3), one Al(1), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(3), one Al(2), and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Na(4), one Ga(1), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Na(4), one Al(1), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(4), one Al(2), and one Si(2) atom. Br(1) is bonded in a tetrahedral geometry to one Na(1), one Na(2), one Na(3), and one Na(4) atom. is represented by the CIF card [CIF]
data_Na4Al2GaSi3BrO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.059
_cell_length_b   9.059
_cell_length_c   9.056
_cell_angle_alpha   89.998
_cell_angle_beta   89.998
_cell_angle_gamma   89.991
_symmetry_Int_Tables_number   1
_cell_volume   743.197
_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  0.685  0.816  0.316  1.0
  Na  Na1  1  0.685  0.183  0.685  1.0
  Na  Na2  1  0.315  0.184  0.315  1.0
  Na  Na3  1  0.315  0.815  0.684  1.0
  Na  Na4  1  0.816  0.685  0.816  1.0
  Na  Na5  1  0.183  0.685  0.185  1.0
  Na  Na6  1  0.184  0.315  0.815  1.0
  Na  Na7  1  0.815  0.315  0.184  1.0
  Al  Al8  1  0.000  0.000  0.250  1.0
  Al  Al9  1  0.500  0.249  1.000  1.0
  Al  Al10  1  0.000  0.000  0.750  1.0
  Al  Al11  1  0.249  0.500  0.500  1.0
  Ga  Ga12  1  0.751  0.500  0.500  1.0
  Ga  Ga13  1  0.500  0.751  0.000  1.0
  Si  Si14  1  0.752  0.002  0.000  1.0
  Si  Si15  1  0.002  0.752  0.500  1.0
  Si  Si16  1  0.498  0.498  0.250  1.0
  Si  Si17  1  0.002  0.248  0.500  1.0
  Si  Si18  1  0.498  0.498  0.750  1.0
  Si  Si19  1  0.248  0.002  1.000  1.0
  Br  Br20  1  0.500  0.000  0.500  1.0
  Br  Br21  1  0.000  0.500  1.000  1.0
  O  O22  1  0.657  0.862  0.065  1.0
  O  O23  1  0.943  0.850  0.359  1.0
  O  O24  1  0.639  0.564  0.343  1.0
  O  O25  1  0.650  0.140  0.942  1.0
  O  O26  1  0.943  0.150  0.640  1.0
  O  O27  1  0.637  0.431  0.654  1.0
  O  O28  1  0.350  0.140  0.058  1.0
  O  O29  1  0.061  0.148  0.361  1.0
  O  O30  1  0.360  0.438  0.352  1.0
  O  O31  1  0.343  0.862  0.935  1.0
  O  O32  1  0.061  0.852  0.639  1.0
  O  O33  1  0.359  0.557  0.650  1.0
  O  O34  1  0.862  0.657  0.565  1.0
  O  O35  1  0.850  0.943  0.859  1.0
  O  O36  1  0.564  0.639  0.843  1.0
  O  O37  1  0.140  0.650  0.442  1.0
  O  O38  1  0.150  0.943  0.140  1.0
  O  O39  1  0.431  0.637  0.154  1.0
  O  O40  1  0.140  0.350  0.558  1.0
  O  O41  1  0.148  0.061  0.861  1.0
  O  O42  1  0.438  0.360  0.852  1.0
  O  O43  1  0.862  0.343  0.435  1.0
  O  O44  1  0.852  0.061  0.139  1.0
  O  O45  1  0.557  0.359  0.150  1.0
[/CIF]
.