The material described by MgAl(Bi3O5)4 is Antimony trioxide-derived structured and crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(9) atoms. Al(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AlO4 tetrahedra that share corners with two equivalent Bi(2)O5 square pyramids. There are six inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to one O(3), one O(9), and two equivalent O(8) atoms. In the second Bi site, Bi(2) is bonded to one O(1), one O(10), one O(4), and two equivalent O(7) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra and  an edgeedge with one Bi(2)O5 square pyramid. In the third Bi site, Bi(3) is bonded in a distorted T-shaped geometry to one O(4), one O(5), and one O(9) atom. In the fourth Bi site, Bi(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(2), one O(3), and one O(6) atom. In the fifth Bi site, Bi(5) is bonded in a 4-coordinate geometry to one O(5), one O(6), one O(7), and one O(9) atom. In the sixth Bi site, Bi(6) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(5), one O(6), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Bi(1) and one Bi(4) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one Bi(2) and one Bi(3) atom. In the third O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Bi(3), one Bi(5), and one Bi(6) atom. In the fourth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(4), one Bi(5), and one Bi(6) atom. In the fifth O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(5) and two equivalent Bi(2) atoms. In the sixth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Bi(6) and two equivalent Bi(1) atoms. In the seventh O site, O(9) is bonded to one Mg(1), one Bi(1), one Bi(3), and one Bi(5) atom to form distorted corner-sharing OMgBi3 tetrahedra. In the eighth O site, O(10) is bonded in a trigonal planar geometry to one Bi(2), one Bi(4), and one Bi(6) atom. In the ninth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Al(1), one Bi(2), and one Bi(6) atom. In the tenth O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Al(1), and one Bi(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgAl(Bi3O5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.235
_cell_length_b   9.149
_cell_length_c   9.235
_cell_angle_alpha   112.105
_cell_angle_beta   104.342
_cell_angle_gamma   112.525
_symmetry_Int_Tables_number   1
_cell_volume   593.716
_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  0.834  0.000  0.834  1.0
  Al  Al1  1  0.060  0.000  0.060  1.0
  Bi  Bi2  1  0.811  0.682  0.491  1.0
  Bi  Bi3  1  0.189  0.692  0.863  1.0
  Bi  Bi4  1  0.809  0.318  0.129  1.0
  Bi  Bi5  1  0.653  0.553  0.794  1.0
  Bi  Bi6  1  0.172  0.308  0.498  1.0
  Bi  Bi7  1  0.725  0.870  0.208  1.0
  Bi  Bi8  1  0.337  0.130  0.855  1.0
  Bi  Bi9  1  0.241  0.447  0.100  1.0
  Bi  Bi10  1  0.426  0.795  0.600  1.0
  Bi  Bi11  1  0.128  0.827  0.308  1.0
  Bi  Bi12  1  0.481  0.173  0.301  1.0
  Bi  Bi13  1  0.806  0.205  0.631  1.0
  O  O14  1  0.250  0.207  0.249  1.0
  O  O15  1  0.862  0.996  0.052  1.0
  O  O16  1  0.042  0.793  0.043  1.0
  O  O17  1  0.056  0.004  0.866  1.0
  O  O18  1  0.689  0.817  0.419  1.0
  O  O19  1  0.327  0.701  0.094  1.0
  O  O20  1  0.602  0.183  0.872  1.0
  O  O21  1  0.760  0.427  0.638  1.0
  O  O22  1  0.392  0.299  0.625  1.0
  O  O23  1  0.754  0.135  0.357  1.0
  O  O24  1  0.222  0.865  0.620  1.0
  O  O25  1  0.211  0.573  0.333  1.0
  O  O26  1  0.365  0.647  0.732  1.0
  O  O27  1  0.871  0.605  0.216  1.0
  O  O28  1  0.612  0.395  0.267  1.0
  O  O29  1  0.085  0.353  0.718  1.0
  O  O30  1  0.665  0.707  0.659  1.0
  O  O31  1  0.390  0.007  0.014  1.0
  O  O32  1  0.952  0.293  0.958  1.0
  O  O33  1  0.007  0.993  0.382  1.0
[/CIF]
.
The material described by MgAl(Bi3O5)4 is Antimony trioxide-derived structured and crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(9) atoms. Al(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AlO4 tetrahedra that share corners with two equivalent Bi(2)O5 square pyramids. There are six inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to one O(3), one O(9), and two equivalent O(8) atoms. In the second Bi site, Bi(2) is bonded to one O(1), one O(10), one O(4), and two equivalent O(7) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Al(1)O4 tetrahedra and  an edgeedge with one Bi(2)O5 square pyramid. In the third Bi site, Bi(3) is bonded in a distorted T-shaped geometry to one O(4), one O(5), and one O(9) atom. In the fourth Bi site, Bi(4) is bonded in a rectangular see-saw-like geometry to one O(10), one O(2), one O(3), and one O(6) atom. In the fifth Bi site, Bi(5) is bonded in a 4-coordinate geometry to one O(5), one O(6), one O(7), and one O(9) atom. In the sixth Bi site, Bi(6) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(5), one O(6), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Bi(1) and one Bi(4) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one Bi(2) and one Bi(3) atom. In the third O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Bi(3), one Bi(5), and one Bi(6) atom. In the fourth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(4), one Bi(5), and one Bi(6) atom. In the fifth O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(5) and two equivalent Bi(2) atoms. In the sixth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Bi(6) and two equivalent Bi(1) atoms. In the seventh O site, O(9) is bonded to one Mg(1), one Bi(1), one Bi(3), and one Bi(5) atom to form distorted corner-sharing OMgBi3 tetrahedra. In the eighth O site, O(10) is bonded in a trigonal planar geometry to one Bi(2), one Bi(4), and one Bi(6) atom. In the ninth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Al(1), one Bi(2), and one Bi(6) atom. In the tenth O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Al(1), and one Bi(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgAl(Bi3O5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.235
_cell_length_b   9.149
_cell_length_c   9.235
_cell_angle_alpha   112.105
_cell_angle_beta   104.342
_cell_angle_gamma   112.525
_symmetry_Int_Tables_number   1
_cell_volume   593.716
_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  0.834  0.000  0.834  1.0
  Al  Al1  1  0.060  0.000  0.060  1.0
  Bi  Bi2  1  0.811  0.682  0.491  1.0
  Bi  Bi3  1  0.189  0.692  0.863  1.0
  Bi  Bi4  1  0.809  0.318  0.129  1.0
  Bi  Bi5  1  0.653  0.553  0.794  1.0
  Bi  Bi6  1  0.172  0.308  0.498  1.0
  Bi  Bi7  1  0.725  0.870  0.208  1.0
  Bi  Bi8  1  0.337  0.130  0.855  1.0
  Bi  Bi9  1  0.241  0.447  0.100  1.0
  Bi  Bi10  1  0.426  0.795  0.600  1.0
  Bi  Bi11  1  0.128  0.827  0.308  1.0
  Bi  Bi12  1  0.481  0.173  0.301  1.0
  Bi  Bi13  1  0.806  0.205  0.631  1.0
  O  O14  1  0.250  0.207  0.249  1.0
  O  O15  1  0.862  0.996  0.052  1.0
  O  O16  1  0.042  0.793  0.043  1.0
  O  O17  1  0.056  0.004  0.866  1.0
  O  O18  1  0.689  0.817  0.419  1.0
  O  O19  1  0.327  0.701  0.094  1.0
  O  O20  1  0.602  0.183  0.872  1.0
  O  O21  1  0.760  0.427  0.638  1.0
  O  O22  1  0.392  0.299  0.625  1.0
  O  O23  1  0.754  0.135  0.357  1.0
  O  O24  1  0.222  0.865  0.620  1.0
  O  O25  1  0.211  0.573  0.333  1.0
  O  O26  1  0.365  0.647  0.732  1.0
  O  O27  1  0.871  0.605  0.216  1.0
  O  O28  1  0.612  0.395  0.267  1.0
  O  O29  1  0.085  0.353  0.718  1.0
  O  O30  1  0.665  0.707  0.659  1.0
  O  O31  1  0.390  0.007  0.014  1.0
  O  O32  1  0.952  0.293  0.958  1.0
  O  O33  1  0.007  0.993  0.382  1.0
[/CIF]
.