The compound described by Bi2MgO4 is Orthorhombic Perovskite-like structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing MgO6 octahedra. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(1), and three equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), two equivalent O(2), and three equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(2), and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1) and three equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing OMg2Bi3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Mg(1) and three equivalent Bi(2) atoms to form a mixture of distorted edge and corner-sharing OMg2Bi3 square pyramids. is represented by the CIF card [CIF]
data_Mg(BiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.929
_cell_length_b   6.929
_cell_length_c   10.467
_cell_angle_alpha   68.105
_cell_angle_beta   68.105
_cell_angle_gamma   28.400
_symmetry_Int_Tables_number   1
_cell_volume   220.639
_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
  Mg  Mg0  1  0.262  0.262  0.744  1.0
  Mg  Mg1  1  0.738  0.738  0.256  1.0
  Bi  Bi2  1  0.618  0.618  0.607  1.0
  Bi  Bi3  1  0.116  0.116  0.084  1.0
  Bi  Bi4  1  0.884  0.884  0.916  1.0
  Bi  Bi5  1  0.382  0.382  0.393  1.0
  O  O6  1  0.895  0.895  0.250  1.0
  O  O7  1  0.408  0.408  0.767  1.0
  O  O8  1  0.592  0.592  0.233  1.0
  O  O9  1  0.105  0.105  0.750  1.0
  O  O10  1  0.217  0.217  0.400  1.0
  O  O11  1  0.729  0.729  0.897  1.0
  O  O12  1  0.783  0.783  0.600  1.0
  O  O13  1  0.271  0.271  0.103  1.0
[/CIF]
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The compound described by Bi2MgO4 is Orthorhombic Perovskite-like structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing MgO6 octahedra. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(1), and three equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), two equivalent O(2), and three equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(2), and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1) and three equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing OMg2Bi3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Mg(1) and three equivalent Bi(2) atoms to form a mixture of distorted edge and corner-sharing OMg2Bi3 square pyramids. is represented by the CIF card [CIF]
data_Mg(BiO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.929
_cell_length_b   6.929
_cell_length_c   10.467
_cell_angle_alpha   68.105
_cell_angle_beta   68.105
_cell_angle_gamma   28.400
_symmetry_Int_Tables_number   1
_cell_volume   220.639
_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
  Mg  Mg0  1  0.262  0.262  0.744  1.0
  Mg  Mg1  1  0.738  0.738  0.256  1.0
  Bi  Bi2  1  0.618  0.618  0.607  1.0
  Bi  Bi3  1  0.116  0.116  0.084  1.0
  Bi  Bi4  1  0.884  0.884  0.916  1.0
  Bi  Bi5  1  0.382  0.382  0.393  1.0
  O  O6  1  0.895  0.895  0.250  1.0
  O  O7  1  0.408  0.408  0.767  1.0
  O  O8  1  0.592  0.592  0.233  1.0
  O  O9  1  0.105  0.105  0.750  1.0
  O  O10  1  0.217  0.217  0.400  1.0
  O  O11  1  0.729  0.729  0.897  1.0
  O  O12  1  0.783  0.783  0.600  1.0
  O  O13  1  0.271  0.271  0.103  1.0
[/CIF]
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