The material described by Na4FeO5 is High Pressure (4-7GPa) Tellurium-derived structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with three equivalent Na(4)O6 octahedra, and edges with three equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-26°. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-24°. In the third Na site, Na(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with four equivalent Na(4)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 17-22°. In the fourth Na site, Na(4) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Na(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-23°. In the fifth Na site, Na(5) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(4)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 17-26°. Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form FeO6 octahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, corners with three equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with three equivalent Na(4)O6 octahedra, and edges with three equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-14°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), two equivalent Na(4), and two equivalent Fe(1) atoms to form distorted ONa4Fe2 octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(2)Na5Fe octahedra,  a cornercorner with one O(5)Na5Fe octahedra, edges with two equivalent O(1)Na4Fe2 octahedra, edges with three equivalent O(2)Na5Fe octahedra, and edges with four equivalent O(5)Na5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-15°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), one Na(5), and one Fe(1) atom to form distorted ONa5Fe octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(5)Na5Fe octahedra, corners with two equivalent O(2)Na5Fe octahedra, edges with three equivalent O(1)Na4Fe2 octahedra, and edges with three equivalent O(5)Na5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Na(5), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), two equivalent Na(5), and one Fe(1) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Na(5), two equivalent Na(4), and one Fe(1) atom to form distorted ONa5Fe octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(2)Na5Fe octahedra,  a cornercorner with one O(5)Na5Fe octahedra,  an edgeedge with one O(5)Na5Fe octahedra, edges with three equivalent O(2)Na5Fe octahedra, and edges with four equivalent O(1)Na4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-15°. is represented by the CIF file [CIF]
data_Na4FeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.712
_cell_length_b   8.500
_cell_length_c   5.683
_cell_angle_alpha   101.340
_cell_angle_beta   102.208
_cell_angle_gamma   109.387
_symmetry_Int_Tables_number   1
_cell_volume   243.513
_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  0.198  0.707  0.592  1.0
  Na  Na1  1  0.000  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.417  0.903  0.199  1.0
  Na  Na4  1  0.405  0.405  0.701  1.0
  Na  Na5  1  0.595  0.595  0.299  1.0
  Na  Na6  1  0.583  0.097  0.801  1.0
  Na  Na7  1  0.802  0.293  0.408  1.0
  Fe  Fe8  1  0.185  0.193  0.098  1.0
  Fe  Fe9  1  0.815  0.807  0.902  1.0
  O  O10  1  0.151  0.963  0.886  1.0
  O  O11  1  0.023  0.242  0.807  1.0
  O  O12  1  0.177  0.393  0.300  1.0
  O  O13  1  0.490  0.690  0.940  1.0
  O  O14  1  0.627  0.843  0.608  1.0
  O  O15  1  0.373  0.157  0.392  1.0
  O  O16  1  0.510  0.310  0.060  1.0
  O  O17  1  0.823  0.607  0.700  1.0
  O  O18  1  0.977  0.758  0.193  1.0
  O  O19  1  0.849  0.037  0.114  1.0
[/CIF]
.
The material described by Na4FeO5 is High Pressure (4-7GPa) Tellurium-derived structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with three equivalent Na(4)O6 octahedra, and edges with three equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-26°. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(3)O6 octahedra, corners with two equivalent Na(5)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-24°. In the third Na site, Na(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with four equivalent Na(4)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 17-22°. In the fourth Na site, Na(4) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Na(5)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Na(5)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with two equivalent Na(4)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-23°. In the fifth Na site, Na(5) is bonded to one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted NaO6 octahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(4)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with two equivalent Na(5)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 17-26°. Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form FeO6 octahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(4)O6 octahedra, corners with three equivalent Na(1)O6 octahedra,  an edgeedge with one Na(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(3)O6 octahedra, edges with three equivalent Na(4)O6 octahedra, and edges with three equivalent Na(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-14°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(3), two equivalent Na(4), and two equivalent Fe(1) atoms to form distorted ONa4Fe2 octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(2)Na5Fe octahedra,  a cornercorner with one O(5)Na5Fe octahedra, edges with two equivalent O(1)Na4Fe2 octahedra, edges with three equivalent O(2)Na5Fe octahedra, and edges with four equivalent O(5)Na5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-15°. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), one Na(5), and one Fe(1) atom to form distorted ONa5Fe octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(5)Na5Fe octahedra, corners with two equivalent O(2)Na5Fe octahedra, edges with three equivalent O(1)Na4Fe2 octahedra, and edges with three equivalent O(5)Na5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Na(5), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), two equivalent Na(5), and one Fe(1) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Na(5), two equivalent Na(4), and one Fe(1) atom to form distorted ONa5Fe octahedra that share  a cornercorner with one O(1)Na4Fe2 octahedra,  a cornercorner with one O(2)Na5Fe octahedra,  a cornercorner with one O(5)Na5Fe octahedra,  an edgeedge with one O(5)Na5Fe octahedra, edges with three equivalent O(2)Na5Fe octahedra, and edges with four equivalent O(1)Na4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-15°. is represented by the CIF file [CIF]
data_Na4FeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.712
_cell_length_b   8.500
_cell_length_c   5.683
_cell_angle_alpha   101.340
_cell_angle_beta   102.208
_cell_angle_gamma   109.387
_symmetry_Int_Tables_number   1
_cell_volume   243.513
_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  0.198  0.707  0.592  1.0
  Na  Na1  1  0.000  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.417  0.903  0.199  1.0
  Na  Na4  1  0.405  0.405  0.701  1.0
  Na  Na5  1  0.595  0.595  0.299  1.0
  Na  Na6  1  0.583  0.097  0.801  1.0
  Na  Na7  1  0.802  0.293  0.408  1.0
  Fe  Fe8  1  0.185  0.193  0.098  1.0
  Fe  Fe9  1  0.815  0.807  0.902  1.0
  O  O10  1  0.151  0.963  0.886  1.0
  O  O11  1  0.023  0.242  0.807  1.0
  O  O12  1  0.177  0.393  0.300  1.0
  O  O13  1  0.490  0.690  0.940  1.0
  O  O14  1  0.627  0.843  0.608  1.0
  O  O15  1  0.373  0.157  0.392  1.0
  O  O16  1  0.510  0.310  0.060  1.0
  O  O17  1  0.823  0.607  0.700  1.0
  O  O18  1  0.977  0.758  0.193  1.0
  O  O19  1  0.849  0.037  0.114  1.0
[/CIF]
.