The material described by Mg(Bi2O5)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Bi(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-46°. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form BiO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with three equivalent Bi(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-55°. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Bi(1) atoms to form distorted OMg2Bi2 tetrahedra that share corners with two equivalent O(1)Mg2Bi2 tetrahedra and edges with four equivalent O(3)MgBi3 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Bi(2), and two equivalent Bi(1) atoms to form distorted OMgBi3 trigonal pyramids that share corners with three equivalent O(3)MgBi3 trigonal pyramids and edges with two equivalent O(1)Mg2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Bi(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(Bi2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.970
_cell_length_b   5.869
_cell_length_c   4.232
_cell_angle_alpha   111.141
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   254.125
_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
  Mg  Mg0  1  0.000  0.112  0.555  1.0
  Bi  Bi1  1  0.181  0.762  0.880  1.0
  Bi  Bi2  1  0.319  0.222  0.611  1.0
  Bi  Bi3  1  0.681  0.222  0.611  1.0
  Bi  Bi4  1  0.819  0.762  0.880  1.0
  O  O5  1  0.000  0.949  0.974  1.0
  O  O6  1  0.130  0.382  0.690  1.0
  O  O7  1  0.165  0.875  0.437  1.0
  O  O8  1  0.283  0.116  0.058  1.0
  O  O9  1  0.355  0.602  0.801  1.0
  O  O10  1  0.500  0.096  0.548  1.0
  O  O11  1  0.645  0.602  0.801  1.0
  O  O12  1  0.870  0.382  0.690  1.0
  O  O13  1  0.717  0.116  0.058  1.0
  O  O14  1  0.835  0.875  0.437  1.0
[/CIF]
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The material described by Mg(Bi2O5)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Bi(1)O6 octahedra, and edges with four equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-46°. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form BiO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with three equivalent Bi(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-55°. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Bi(1) atoms to form distorted OMg2Bi2 tetrahedra that share corners with two equivalent O(1)Mg2Bi2 tetrahedra and edges with four equivalent O(3)MgBi3 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Bi(2), and two equivalent Bi(1) atoms to form distorted OMgBi3 trigonal pyramids that share corners with three equivalent O(3)MgBi3 trigonal pyramids and edges with two equivalent O(1)Mg2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the fifth O site, O(5) is bonded in a water-like geometry to one Bi(1) and one Bi(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Bi(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(Bi2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.970
_cell_length_b   5.869
_cell_length_c   4.232
_cell_angle_alpha   111.141
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   254.125
_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
  Mg  Mg0  1  0.000  0.112  0.555  1.0
  Bi  Bi1  1  0.181  0.762  0.880  1.0
  Bi  Bi2  1  0.319  0.222  0.611  1.0
  Bi  Bi3  1  0.681  0.222  0.611  1.0
  Bi  Bi4  1  0.819  0.762  0.880  1.0
  O  O5  1  0.000  0.949  0.974  1.0
  O  O6  1  0.130  0.382  0.690  1.0
  O  O7  1  0.165  0.875  0.437  1.0
  O  O8  1  0.283  0.116  0.058  1.0
  O  O9  1  0.355  0.602  0.801  1.0
  O  O10  1  0.500  0.096  0.548  1.0
  O  O11  1  0.645  0.602  0.801  1.0
  O  O12  1  0.870  0.382  0.690  1.0
  O  O13  1  0.717  0.116  0.058  1.0
  O  O14  1  0.835  0.875  0.437  1.0
[/CIF]
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