The material structure described by MgGe4(BiO6)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a distorted see-saw-like geometry to two equivalent O(2) and two equivalent O(4) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Bi(1)O6 octahedra and corners with two equivalent Bi(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 60°. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form BiO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra and edges with two equivalent Bi(2)O6 pentagonal pyramids. In the second Bi site, Bi(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form distorted BiO6 pentagonal pyramids that share corners with four equivalent Ge(2)O4 tetrahedra and edges with two equivalent Bi(1)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ge(2) and one Bi(2) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one Ge(1), and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ge(1), one Bi(1), and one Bi(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ge(2), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgGe4(BiO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.656
_cell_length_b   7.598
_cell_length_c   7.598
_cell_angle_alpha   83.190
_cell_angle_beta   76.882
_cell_angle_gamma   76.882
_symmetry_Int_Tables_number   1
_cell_volume   308.989
_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  0.750  0.584  0.416  1.0
  Ge  Ge1  1  0.723  0.361  0.183  1.0
  Ge  Ge2  1  0.777  0.817  0.639  1.0
  Ge  Ge3  1  0.264  0.640  0.809  1.0
  Ge  Ge4  1  0.236  0.191  0.360  1.0
  Bi  Bi5  1  0.750  0.903  0.097  1.0
  Bi  Bi6  1  0.250  0.146  0.854  1.0
  O  O7  1  0.452  0.336  0.348  1.0
  O  O8  1  0.048  0.652  0.664  1.0
  O  O9  1  0.563  0.655  0.662  1.0
  O  O10  1  0.937  0.338  0.345  1.0
  O  O11  1  0.204  0.084  0.576  1.0
  O  O12  1  0.296  0.424  0.916  1.0
  O  O13  1  0.810  0.841  0.401  1.0
  O  O14  1  0.690  0.599  0.159  1.0
  O  O15  1  0.836  0.198  0.026  1.0
  O  O16  1  0.664  0.974  0.802  1.0
  O  O17  1  0.163  0.833  0.937  1.0
  O  O18  1  0.337  0.063  0.167  1.0
[/CIF]
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The material structure described by MgGe4(BiO6)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded in a distorted see-saw-like geometry to two equivalent O(2) and two equivalent O(4) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Ge site, Ge(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Bi(1)O6 octahedra and corners with two equivalent Bi(2)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 60°. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form BiO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra and edges with two equivalent Bi(2)O6 pentagonal pyramids. In the second Bi site, Bi(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form distorted BiO6 pentagonal pyramids that share corners with four equivalent Ge(2)O4 tetrahedra and edges with two equivalent Bi(1)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Ge(2) and one Bi(2) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one Ge(1), and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ge(1), one Bi(1), and one Bi(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ge(2), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgGe4(BiO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.656
_cell_length_b   7.598
_cell_length_c   7.598
_cell_angle_alpha   83.190
_cell_angle_beta   76.882
_cell_angle_gamma   76.882
_symmetry_Int_Tables_number   1
_cell_volume   308.989
_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  0.750  0.584  0.416  1.0
  Ge  Ge1  1  0.723  0.361  0.183  1.0
  Ge  Ge2  1  0.777  0.817  0.639  1.0
  Ge  Ge3  1  0.264  0.640  0.809  1.0
  Ge  Ge4  1  0.236  0.191  0.360  1.0
  Bi  Bi5  1  0.750  0.903  0.097  1.0
  Bi  Bi6  1  0.250  0.146  0.854  1.0
  O  O7  1  0.452  0.336  0.348  1.0
  O  O8  1  0.048  0.652  0.664  1.0
  O  O9  1  0.563  0.655  0.662  1.0
  O  O10  1  0.937  0.338  0.345  1.0
  O  O11  1  0.204  0.084  0.576  1.0
  O  O12  1  0.296  0.424  0.916  1.0
  O  O13  1  0.810  0.841  0.401  1.0
  O  O14  1  0.690  0.599  0.159  1.0
  O  O15  1  0.836  0.198  0.026  1.0
  O  O16  1  0.664  0.974  0.802  1.0
  O  O17  1  0.163  0.833  0.937  1.0
  O  O18  1  0.337  0.063  0.167  1.0
[/CIF]
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