The crystal structure described by Na5MgBiO5 crystallizes in the triclinic P1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(5) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the third Na site, Na(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. In the fourth Na site, Na(4) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra and  an edgeedge with one Mg(1)O4 tetrahedra. In the fifth Na site, Na(5) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. Mg(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one Na(4)O4 trigonal pyramid and  an edgeedge with one Na(4)O4 trigonal pyramid. Bi(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a trigonal bipyramidal geometry to one Na(2), one Na(3), one Na(4), one Na(5), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one Mg(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(5), one Mg(1), and one Bi(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na5MgBiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.592
_cell_length_b   6.379
_cell_length_c   6.785
_cell_angle_alpha   78.506
_cell_angle_beta   93.845
_cell_angle_gamma   59.125
_symmetry_Int_Tables_number   1
_cell_volume   199.410
_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  0.524  0.715  0.903  1.0
  Na  Na1  1  0.783  0.603  0.362  1.0
  Na  Na2  1  0.397  0.450  0.643  1.0
  Na  Na3  1  0.421  0.378  0.198  1.0
  Na  Na4  1  0.017  0.041  0.485  1.0
  Mg  Mg5  1  0.080  0.338  0.919  1.0
  Bi  Bi6  1  0.915  0.964  0.026  1.0
  O  O7  1  0.129  0.634  0.873  1.0
  O  O8  1  0.489  0.036  0.032  1.0
  O  O9  1  0.125  0.709  0.332  1.0
  O  O10  1  0.867  0.331  0.679  1.0
  O  O11  1  0.858  0.327  0.144  1.0
[/CIF]
.
The crystal structure described by Na5MgBiO5 crystallizes in the triclinic P1 space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(5) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the third Na site, Na(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. In the fourth Na site, Na(4) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra and  an edgeedge with one Mg(1)O4 tetrahedra. In the fifth Na site, Na(5) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. Mg(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form MgO4 tetrahedra that share  a cornercorner with one Na(4)O4 trigonal pyramid and  an edgeedge with one Na(4)O4 trigonal pyramid. Bi(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a trigonal bipyramidal geometry to one Na(2), one Na(3), one Na(4), one Na(5), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one Mg(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(5), one Mg(1), and one Bi(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na5MgBiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.592
_cell_length_b   6.379
_cell_length_c   6.785
_cell_angle_alpha   78.506
_cell_angle_beta   93.845
_cell_angle_gamma   59.125
_symmetry_Int_Tables_number   1
_cell_volume   199.410
_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  0.524  0.715  0.903  1.0
  Na  Na1  1  0.783  0.603  0.362  1.0
  Na  Na2  1  0.397  0.450  0.643  1.0
  Na  Na3  1  0.421  0.378  0.198  1.0
  Na  Na4  1  0.017  0.041  0.485  1.0
  Mg  Mg5  1  0.080  0.338  0.919  1.0
  Bi  Bi6  1  0.915  0.964  0.026  1.0
  O  O7  1  0.129  0.634  0.873  1.0
  O  O8  1  0.489  0.036  0.032  1.0
  O  O9  1  0.125  0.709  0.332  1.0
  O  O10  1  0.867  0.331  0.679  1.0
  O  O11  1  0.858  0.327  0.144  1.0
[/CIF]
.