The crystal structure described by Na4FeAl3O8 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(2), one O(3), one O(7), and one O(8) atom to form NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(1), one O(4), one O(7), and one O(8) atom to form NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. Fe(1) is bonded to one O(1), one O(2), one O(5), and one O(8) atom to form FeO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the third Al site, Al(3) is bonded to one O(3), one O(4), one O(5), and one O(8) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(4), one Fe(1), and one Al(1) atom to form distorted ONa2AlFe trigonal pyramids that share corners with two equivalent O(4)Na2Al2 trigonal pyramids and corners with two equivalent O(2)Na2AlFe trigonal pyramids. In the second O site, O(2) is bonded to one Na(2), one Na(3), one Fe(1), and one Al(1) atom to form distorted ONa2AlFe trigonal pyramids that share corners with two equivalent O(3)Na2Al2 trigonal pyramids and corners with two equivalent O(1)Na2AlFe trigonal pyramids. In the third O site, O(3) is bonded to one Na(2), one Na(3), one Al(2), and one Al(3) atom to form distorted ONa2Al2 trigonal pyramids that share corners with two equivalent O(4)Na2Al2 trigonal pyramids and corners with two equivalent O(2)Na2AlFe trigonal pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(4), one Al(2), and one Al(3) atom to form distorted ONa2Al2 trigonal pyramids that share corners with two equivalent O(3)Na2Al2 trigonal pyramids and corners with two equivalent O(1)Na2AlFe trigonal pyramids. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Fe(1), and one Al(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Al(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(3), one Na(4), one Al(1), and one Al(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(3), one Na(4), one Fe(1), and one Al(3) atom. is represented by the CIF card [CIF]
data_Na4Al3FeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.541
_cell_length_c   7.115
_cell_angle_alpha   90.025
_cell_angle_beta   90.004
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   210.172
_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  0.515  0.068  0.377  1.0
  Na  Na1  1  0.014  0.929  0.625  1.0
  Na  Na2  1  0.013  0.427  0.877  1.0
  Na  Na3  1  0.514  0.573  0.121  1.0
  Al  Al4  1  0.499  0.563  0.632  1.0
  Al  Al5  1  0.501  0.063  0.874  1.0
  Al  Al6  1  0.001  0.939  0.120  1.0
  Fe  Fe7  1  0.001  0.439  0.374  1.0
  O  O8  1  0.652  0.469  0.422  1.0
  O  O9  1  0.171  0.540  0.592  1.0
  O  O10  1  0.174  0.039  0.921  1.0
  O  O11  1  0.674  0.970  0.076  1.0
  O  O12  1  0.075  0.107  0.326  1.0
  O  O13  1  0.573  0.873  0.678  1.0
  O  O14  1  0.574  0.372  0.826  1.0
  O  O15  1  0.075  0.629  0.158  1.0
[/CIF]
.
The crystal structure described by Na4FeAl3O8 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(2), one O(3), one O(7), and one O(8) atom to form NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the fourth Na site, Na(4) is bonded to one O(1), one O(4), one O(7), and one O(8) atom to form NaO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. Fe(1) is bonded to one O(1), one O(2), one O(5), and one O(8) atom to form FeO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. In the second Al site, Al(2) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. In the third Al site, Al(3) is bonded to one O(3), one O(4), one O(5), and one O(8) atom to form AlO4 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(4), one Fe(1), and one Al(1) atom to form distorted ONa2AlFe trigonal pyramids that share corners with two equivalent O(4)Na2Al2 trigonal pyramids and corners with two equivalent O(2)Na2AlFe trigonal pyramids. In the second O site, O(2) is bonded to one Na(2), one Na(3), one Fe(1), and one Al(1) atom to form distorted ONa2AlFe trigonal pyramids that share corners with two equivalent O(3)Na2Al2 trigonal pyramids and corners with two equivalent O(1)Na2AlFe trigonal pyramids. In the third O site, O(3) is bonded to one Na(2), one Na(3), one Al(2), and one Al(3) atom to form distorted ONa2Al2 trigonal pyramids that share corners with two equivalent O(4)Na2Al2 trigonal pyramids and corners with two equivalent O(2)Na2AlFe trigonal pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(4), one Al(2), and one Al(3) atom to form distorted ONa2Al2 trigonal pyramids that share corners with two equivalent O(3)Na2Al2 trigonal pyramids and corners with two equivalent O(1)Na2AlFe trigonal pyramids. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Fe(1), and one Al(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Al(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(3), one Na(4), one Al(1), and one Al(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(3), one Na(4), one Fe(1), and one Al(3) atom. is represented by the CIF card [CIF]
data_Na4Al3FeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.541
_cell_length_c   7.115
_cell_angle_alpha   90.025
_cell_angle_beta   90.004
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   210.172
_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  0.515  0.068  0.377  1.0
  Na  Na1  1  0.014  0.929  0.625  1.0
  Na  Na2  1  0.013  0.427  0.877  1.0
  Na  Na3  1  0.514  0.573  0.121  1.0
  Al  Al4  1  0.499  0.563  0.632  1.0
  Al  Al5  1  0.501  0.063  0.874  1.0
  Al  Al6  1  0.001  0.939  0.120  1.0
  Fe  Fe7  1  0.001  0.439  0.374  1.0
  O  O8  1  0.652  0.469  0.422  1.0
  O  O9  1  0.171  0.540  0.592  1.0
  O  O10  1  0.174  0.039  0.921  1.0
  O  O11  1  0.674  0.970  0.076  1.0
  O  O12  1  0.075  0.107  0.326  1.0
  O  O13  1  0.573  0.873  0.678  1.0
  O  O14  1  0.574  0.372  0.826  1.0
  O  O15  1  0.075  0.629  0.158  1.0
[/CIF]
.