The structure described by MgFeAlO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-60°. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Fe(1), and one Al(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgAlFeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.850
_cell_length_b   5.880
_cell_length_c   5.877
_cell_angle_alpha   60.020
_cell_angle_beta   90.000
_cell_angle_gamma   119.830
_symmetry_Int_Tables_number   1
_cell_volume   143.366
_cell_formula_units_Z   2
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
  Al  Al0  1  0.875  0.250  0.375  1.0
  Al  Al1  1  0.375  0.250  0.375  1.0
  Fe  Fe2  1  0.758  0.516  0.742  1.0
  Fe  Fe3  1  0.992  0.984  0.008  1.0
  Mg  Mg4  1  0.375  0.750  0.875  1.0
  Mg  Mg5  1  0.375  0.750  0.375  1.0
  O  O6  1  0.596  0.708  0.146  1.0
  O  O7  1  0.112  0.708  0.146  1.0
  O  O8  1  0.154  0.792  0.604  1.0
  O  O9  1  0.638  0.792  0.604  1.0
  O  O10  1  0.126  0.251  0.599  1.0
  O  O11  1  0.126  0.251  0.150  1.0
  O  O12  1  0.624  0.249  0.151  1.0
  O  O13  1  0.624  0.249  0.600  1.0
[/CIF]
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The structure described by MgFeAlO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-60°. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Fe(1), and one Al(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgAlFeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.850
_cell_length_b   5.880
_cell_length_c   5.877
_cell_angle_alpha   60.020
_cell_angle_beta   90.000
_cell_angle_gamma   119.830
_symmetry_Int_Tables_number   1
_cell_volume   143.366
_cell_formula_units_Z   2
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
  Al  Al0  1  0.875  0.250  0.375  1.0
  Al  Al1  1  0.375  0.250  0.375  1.0
  Fe  Fe2  1  0.758  0.516  0.742  1.0
  Fe  Fe3  1  0.992  0.984  0.008  1.0
  Mg  Mg4  1  0.375  0.750  0.875  1.0
  Mg  Mg5  1  0.375  0.750  0.375  1.0
  O  O6  1  0.596  0.708  0.146  1.0
  O  O7  1  0.112  0.708  0.146  1.0
  O  O8  1  0.154  0.792  0.604  1.0
  O  O9  1  0.638  0.792  0.604  1.0
  O  O10  1  0.126  0.251  0.599  1.0
  O  O11  1  0.126  0.251  0.150  1.0
  O  O12  1  0.624  0.249  0.151  1.0
  O  O13  1  0.624  0.249  0.600  1.0
[/CIF]
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