The structure described by Ba2MgTbSbO6 crystallizes in the orthorhombic Immm space group. Ba(1) is bonded in a 9-coordinate geometry to one Mg(1), four equivalent O(1), and four equivalent O(2) atoms. Mg(1) is bonded in a square co-planar geometry to two equivalent Ba(1) and four equivalent O(1) atoms. Tb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Ba(1), one Mg(1), one Tb(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Tb(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Ba2TbMgSbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.638
_cell_length_b   6.291
_cell_length_c   6.638
_cell_angle_alpha   61.718
_cell_angle_beta   55.399
_cell_angle_gamma   61.718
_symmetry_Int_Tables_number   1
_cell_volume   192.757
_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
  Ba  Ba0  1  0.807  0.693  0.807  1.0
  Ba  Ba1  1  0.193  0.307  0.193  1.0
  Tb  Tb2  1  0.000  0.000  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.500  1.0
  Sb  Sb4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.268  0.767  0.732  1.0
  O  O6  1  0.243  0.757  0.243  1.0
  O  O7  1  0.757  0.243  0.757  1.0
  O  O8  1  0.268  0.233  0.732  1.0
  O  O9  1  0.732  0.233  0.268  1.0
  O  O10  1  0.732  0.767  0.268  1.0
[/CIF]
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The structure described by Ba2MgTbSbO6 crystallizes in the orthorhombic Immm space group. Ba(1) is bonded in a 9-coordinate geometry to one Mg(1), four equivalent O(1), and four equivalent O(2) atoms. Mg(1) is bonded in a square co-planar geometry to two equivalent Ba(1) and four equivalent O(1) atoms. Tb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SbO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Ba(1), one Mg(1), one Tb(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Tb(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Ba2TbMgSbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.638
_cell_length_b   6.291
_cell_length_c   6.638
_cell_angle_alpha   61.718
_cell_angle_beta   55.399
_cell_angle_gamma   61.718
_symmetry_Int_Tables_number   1
_cell_volume   192.757
_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
  Ba  Ba0  1  0.807  0.693  0.807  1.0
  Ba  Ba1  1  0.193  0.307  0.193  1.0
  Tb  Tb2  1  0.000  0.000  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.500  1.0
  Sb  Sb4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.268  0.767  0.732  1.0
  O  O6  1  0.243  0.757  0.243  1.0
  O  O7  1  0.757  0.243  0.757  1.0
  O  O8  1  0.268  0.233  0.732  1.0
  O  O9  1  0.732  0.233  0.268  1.0
  O  O10  1  0.732  0.767  0.268  1.0
[/CIF]
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