The compound described by Na7MgNbO6 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(6) atom. In the fifth Na site, Na(5) is bonded in a trigonal planar geometry to one O(1), one O(5), and one O(6) atom. In the sixth Na site, Na(6) is bonded in a 3-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the seventh Na site, Na(7) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. Mg(1) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(6) atom. Nb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(5), one Mg(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Na(6), one Na(7), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(6), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), one Na(4), one Na(6), one Na(7), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(2), one Na(4), one Na(5), one Na(6), one Mg(1), and one Nb(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(7), one Mg(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na7MgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.559
_cell_length_b   7.460
_cell_length_c   14.844
_cell_angle_alpha   90.037
_cell_angle_beta   139.026
_cell_angle_gamma   124.650
_symmetry_Int_Tables_number   1
_cell_volume   236.649
_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  0.175  0.826  0.480  1.0
  Na  Na1  1  0.808  0.304  0.508  1.0
  Na  Na2  1  0.300  0.499  0.007  1.0
  Na  Na3  1  0.906  0.207  0.209  1.0
  Na  Na4  1  0.994  0.001  0.609  1.0
  Na  Na5  1  0.709  0.530  0.659  1.0
  Na  Na6  1  0.135  0.659  0.133  1.0
  Mg  Mg7  1  0.012  0.008  0.848  1.0
  Nb  Nb8  1  0.998  0.000  0.027  1.0
  O  O9  1  0.441  0.875  0.729  1.0
  O  O10  1  0.643  0.184  0.297  1.0
  O  O11  1  0.265  0.545  0.840  1.0
  O  O12  1  0.106  0.281  0.120  1.0
  O  O13  1  0.822  0.693  0.856  1.0
  O  O14  1  0.772  0.452  0.171  1.0
[/CIF]
.
The compound described by Na7MgNbO6 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(6) atom. In the fifth Na site, Na(5) is bonded in a trigonal planar geometry to one O(1), one O(5), and one O(6) atom. In the sixth Na site, Na(6) is bonded in a 3-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the seventh Na site, Na(7) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. Mg(1) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(6) atom. Nb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(5), one Mg(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Na(6), one Na(7), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(6), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), one Na(4), one Na(6), one Na(7), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Na(2), one Na(4), one Na(5), one Na(6), one Mg(1), and one Nb(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(7), one Mg(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na7MgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.559
_cell_length_b   7.460
_cell_length_c   14.844
_cell_angle_alpha   90.037
_cell_angle_beta   139.026
_cell_angle_gamma   124.650
_symmetry_Int_Tables_number   1
_cell_volume   236.649
_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  0.175  0.826  0.480  1.0
  Na  Na1  1  0.808  0.304  0.508  1.0
  Na  Na2  1  0.300  0.499  0.007  1.0
  Na  Na3  1  0.906  0.207  0.209  1.0
  Na  Na4  1  0.994  0.001  0.609  1.0
  Na  Na5  1  0.709  0.530  0.659  1.0
  Na  Na6  1  0.135  0.659  0.133  1.0
  Mg  Mg7  1  0.012  0.008  0.848  1.0
  Nb  Nb8  1  0.998  0.000  0.027  1.0
  O  O9  1  0.441  0.875  0.729  1.0
  O  O10  1  0.643  0.184  0.297  1.0
  O  O11  1  0.265  0.545  0.840  1.0
  O  O12  1  0.106  0.281  0.120  1.0
  O  O13  1  0.822  0.693  0.856  1.0
  O  O14  1  0.772  0.452  0.171  1.0
[/CIF]
.