The structure described by MgCrGaO4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted MgO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Ga(1)O5 trigonal bipyramids, and faces with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-47°. Cr(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with six equivalent Ga(1)O5 trigonal bipyramids, edges with two equivalent Cr(1)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-47°. Ga(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form distorted GaO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with six equivalent Cr(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Ga(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 49-73°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms to form distorted OMgCrGa2 tetrahedra that share corners with two equivalent O(1)MgCrGa2 tetrahedra, corners with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids, and edges with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Mg(1), two equivalent Cr(1), and one Ga(1) atom to form distorted OMg2Cr2Ga trigonal bipyramids that share corners with two equivalent O(1)MgCrGa2 tetrahedra, edges with two equivalent O(1)MgCrGa2 tetrahedra, and edges with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_MgCrGaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.297
_cell_length_b   6.048
_cell_length_c   5.179
_cell_angle_alpha   100.029
_cell_angle_beta   78.540
_cell_angle_gamma   151.158
_symmetry_Int_Tables_number   1
_cell_volume   78.447
_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  0.501  0.035  0.032  1.0
  Cr  Cr1  1  0.567  0.035  0.505  1.0
  Ga  Ga2  1  0.496  0.535  0.928  1.0
  O  O3  1  0.240  0.035  0.802  1.0
  O  O4  1  0.199  0.536  0.740  1.0
  O  O5  1  0.849  0.035  0.165  1.0
  O  O6  1  0.922  0.535  0.316  1.0
[/CIF]
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The structure described by MgCrGaO4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form distorted MgO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Ga(1)O5 trigonal bipyramids, and faces with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-47°. Cr(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with six equivalent Ga(1)O5 trigonal bipyramids, edges with two equivalent Cr(1)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-47°. Ga(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form distorted GaO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with six equivalent Cr(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Ga(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 49-73°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms to form distorted OMgCrGa2 tetrahedra that share corners with two equivalent O(1)MgCrGa2 tetrahedra, corners with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids, and edges with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Mg(1), two equivalent Cr(1), and one Ga(1) atom to form distorted OMg2Cr2Ga trigonal bipyramids that share corners with two equivalent O(1)MgCrGa2 tetrahedra, edges with two equivalent O(1)MgCrGa2 tetrahedra, and edges with two equivalent O(2)Mg2Cr2Ga trigonal bipyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Cr(1), and two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_MgCrGaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.297
_cell_length_b   6.048
_cell_length_c   5.179
_cell_angle_alpha   100.029
_cell_angle_beta   78.540
_cell_angle_gamma   151.158
_symmetry_Int_Tables_number   1
_cell_volume   78.447
_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  0.501  0.035  0.032  1.0
  Cr  Cr1  1  0.567  0.035  0.505  1.0
  Ga  Ga2  1  0.496  0.535  0.928  1.0
  O  O3  1  0.240  0.035  0.802  1.0
  O  O4  1  0.199  0.536  0.740  1.0
  O  O5  1  0.849  0.035  0.165  1.0
  O  O6  1  0.922  0.535  0.316  1.0
[/CIF]
.