The material described by MgAg2(BiO3)2 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one Ag(2), two equivalent O(2), and two equivalent O(3) atoms to form distorted MgAgO4 tetrahedra that share corners with two equivalent Mg(1)AgO4 tetrahedra and corners with two equivalent O(4)Ag2Bi2 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Ag site, Ag(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent O(3), and two equivalent O(4) atoms. Bi(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ag(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded to one Mg(1), one Ag(1), and two equivalent Bi(1) atoms to form OMgAgBi2 trigonal pyramids that share corners with two equivalent O(4)Ag2Bi2 tetrahedra, corners with two equivalent O(2)MgAgBi2 trigonal pyramids, and  an edgeedge with one O(2)MgAgBi2 trigonal pyramid. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Ag(2), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Ag(2) and two equivalent Bi(1) atoms to form OAg2Bi2 tetrahedra that share corners with two equivalent Mg(1)AgO4 tetrahedra, corners with two equivalent O(4)Ag2Bi2 tetrahedra, and corners with four equivalent O(2)MgAgBi2 trigonal pyramids. is represented by the CIF card [CIF]
data_MgAg2(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.189
_cell_length_b   7.190
_cell_length_c   3.584
_cell_angle_alpha   90.202
_cell_angle_beta   90.205
_cell_angle_gamma   78.021
_symmetry_Int_Tables_number   1
_cell_volume   181.239
_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  0.762  0.762  0.502  1.0
  Ag  Ag1  1  0.500  0.501  0.501  1.0
  Ag  Ag2  1  0.011  0.011  0.498  1.0
  Bi  Bi3  1  0.032  0.460  0.001  1.0
  Bi  Bi4  1  0.460  0.033  0.001  1.0
  O  O5  1  0.202  0.530  0.502  1.0
  O  O6  1  0.477  0.805  0.500  1.0
  O  O7  1  0.834  0.835  0.003  1.0
  O  O8  1  0.150  0.150  0.999  1.0
  O  O9  1  0.805  0.478  0.500  1.0
  O  O10  1  0.529  0.203  0.502  1.0
[/CIF]
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The material described by MgAg2(BiO3)2 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one Ag(2), two equivalent O(2), and two equivalent O(3) atoms to form distorted MgAgO4 tetrahedra that share corners with two equivalent Mg(1)AgO4 tetrahedra and corners with two equivalent O(4)Ag2Bi2 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Ag site, Ag(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent O(3), and two equivalent O(4) atoms. Bi(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ag(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded to one Mg(1), one Ag(1), and two equivalent Bi(1) atoms to form OMgAgBi2 trigonal pyramids that share corners with two equivalent O(4)Ag2Bi2 tetrahedra, corners with two equivalent O(2)MgAgBi2 trigonal pyramids, and  an edgeedge with one O(2)MgAgBi2 trigonal pyramid. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Ag(2), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Ag(2) and two equivalent Bi(1) atoms to form OAg2Bi2 tetrahedra that share corners with two equivalent Mg(1)AgO4 tetrahedra, corners with two equivalent O(4)Ag2Bi2 tetrahedra, and corners with four equivalent O(2)MgAgBi2 trigonal pyramids. is represented by the CIF card [CIF]
data_MgAg2(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.189
_cell_length_b   7.190
_cell_length_c   3.584
_cell_angle_alpha   90.202
_cell_angle_beta   90.205
_cell_angle_gamma   78.021
_symmetry_Int_Tables_number   1
_cell_volume   181.239
_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  0.762  0.762  0.502  1.0
  Ag  Ag1  1  0.500  0.501  0.501  1.0
  Ag  Ag2  1  0.011  0.011  0.498  1.0
  Bi  Bi3  1  0.032  0.460  0.001  1.0
  Bi  Bi4  1  0.460  0.033  0.001  1.0
  O  O5  1  0.202  0.530  0.502  1.0
  O  O6  1  0.477  0.805  0.500  1.0
  O  O7  1  0.834  0.835  0.003  1.0
  O  O8  1  0.150  0.150  0.999  1.0
  O  O9  1  0.805  0.478  0.500  1.0
  O  O10  1  0.529  0.203  0.502  1.0
[/CIF]
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