The material structure described by MgCr2(AgO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. Cr(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form CrO4 tetrahedra that share corners with three equivalent Ag(1)O6 octahedra and corners with three equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form AgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Ag(2)O6 octahedra. In the second Ag site, Ag(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form AgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Ag(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Cr(1), one Ag(1), and one Ag(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one Ag(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Cr(1), and one Ag(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(AgO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.442
_cell_length_b   5.442
_cell_length_c   7.354
_cell_angle_alpha   91.732
_cell_angle_beta   91.732
_cell_angle_gamma   71.088
_symmetry_Int_Tables_number   1
_cell_volume   205.865
_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  0.500  0.500  0.000  1.0
  Cr  Cr1  1  0.344  0.344  0.269  1.0
  Cr  Cr2  1  0.656  0.656  0.731  1.0
  Ag  Ag3  1  0.000  0.000  0.000  1.0
  Ag  Ag4  1  0.000  0.000  0.500  1.0
  O  O5  1  0.256  0.669  0.239  1.0
  O  O6  1  0.331  0.744  0.761  1.0
  O  O7  1  0.756  0.756  0.549  1.0
  O  O8  1  0.248  0.248  0.065  1.0
  O  O9  1  0.752  0.752  0.935  1.0
  O  O10  1  0.244  0.244  0.451  1.0
  O  O11  1  0.744  0.331  0.761  1.0
  O  O12  1  0.669  0.256  0.239  1.0
[/CIF]
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The material structure described by MgCr2(AgO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. Cr(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form CrO4 tetrahedra that share corners with three equivalent Ag(1)O6 octahedra and corners with three equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form AgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Ag(2)O6 octahedra. In the second Ag site, Ag(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form AgO6 octahedra that share corners with six equivalent Cr(1)O4 tetrahedra and edges with two equivalent Ag(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Cr(1), one Ag(1), and one Ag(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one Ag(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Cr(1), and one Ag(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(AgO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.442
_cell_length_b   5.442
_cell_length_c   7.354
_cell_angle_alpha   91.732
_cell_angle_beta   91.732
_cell_angle_gamma   71.088
_symmetry_Int_Tables_number   1
_cell_volume   205.865
_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  0.500  0.500  0.000  1.0
  Cr  Cr1  1  0.344  0.344  0.269  1.0
  Cr  Cr2  1  0.656  0.656  0.731  1.0
  Ag  Ag3  1  0.000  0.000  0.000  1.0
  Ag  Ag4  1  0.000  0.000  0.500  1.0
  O  O5  1  0.256  0.669  0.239  1.0
  O  O6  1  0.331  0.744  0.761  1.0
  O  O7  1  0.756  0.756  0.549  1.0
  O  O8  1  0.248  0.248  0.065  1.0
  O  O9  1  0.752  0.752  0.935  1.0
  O  O10  1  0.244  0.244  0.451  1.0
  O  O11  1  0.744  0.331  0.761  1.0
  O  O12  1  0.669  0.256  0.239  1.0
[/CIF]
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