The material structure described by MgFe2(SbO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form MgO6 octahedra that share corners with two equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Sb(1)O5 trigonal bipyramid. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted SbO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Sb(2)O6 octahedra, and  an edgeedge with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. In the second Sb site, Sb(2) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form SbO6 octahedra that share corners with three equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Sb(2) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Fe(2), and one Sb(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Fe(1), one Fe(2), and one Sb(1) atom to form OMgFe2Sb trigonal pyramids that share  a cornercorner with one O(4)MgFeSb2 trigonal pyramid, corners with two equivalent O(5)MgFe2Sb trigonal pyramids, corners with three equivalent O(6)MgFeSb2 trigonal pyramids,  an edgeedge with one O(5)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(4)MgFeSb2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Fe(1), one Sb(1), and one Sb(2) atom to form distorted OMgFeSb2 trigonal pyramids that share  a cornercorner with one O(3)MgFe2Sb trigonal pyramid, corners with two equivalent O(6)MgFeSb2 trigonal pyramids, corners with three equivalent O(5)MgFe2Sb trigonal pyramids,  an edgeedge with one O(3)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(6)MgFeSb2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Fe(1), one Fe(2), and one Sb(1) atom to form distorted OMgFe2Sb trigonal pyramids that share  a cornercorner with one O(6)MgFeSb2 trigonal pyramid, corners with two equivalent O(3)MgFe2Sb trigonal pyramids, corners with three equivalent O(4)MgFeSb2 trigonal pyramids,  an edgeedge with one O(3)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(6)MgFeSb2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Fe(1), one Sb(1), and one Sb(2) atom to form OMgFeSb2 trigonal pyramids that share  a cornercorner with one O(5)MgFe2Sb trigonal pyramid, corners with two equivalent O(4)MgFeSb2 trigonal pyramids, corners with three equivalent O(3)MgFe2Sb trigonal pyramids,  an edgeedge with one O(5)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(4)MgFeSb2 trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(2), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(2), one Sb(1), and one Sb(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe2(SbO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.891
_cell_length_c   6.058
_cell_angle_alpha   69.121
_cell_angle_beta   98.372
_cell_angle_gamma   62.142
_symmetry_Int_Tables_number   1
_cell_volume   163.023
_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  0.493  0.520  0.498  1.0
  Fe  Fe1  1  0.811  0.770  0.577  1.0
  Fe  Fe2  1  0.488  0.512  0.004  1.0
  Sb  Sb3  1  0.180  0.246  0.428  1.0
  Sb  Sb4  1  0.996  0.995  0.997  1.0
  O  O5  1  0.059  0.723  0.863  1.0
  O  O6  1  0.600  0.226  0.858  1.0
  O  O7  1  0.444  0.815  0.635  1.0
  O  O8  1  0.943  0.318  0.639  1.0
  O  O9  1  0.503  0.230  0.364  1.0
  O  O10  1  0.050  0.672  0.351  1.0
  O  O11  1  0.387  0.814  0.140  1.0
  O  O12  1  0.927  0.278  0.156  1.0
[/CIF]
.
The material structure described by MgFe2(SbO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form MgO6 octahedra that share corners with two equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Sb(1)O5 trigonal bipyramid. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted SbO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Sb(2)O6 octahedra, and  an edgeedge with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. In the second Sb site, Sb(2) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form SbO6 octahedra that share corners with three equivalent Sb(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Sb(2) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Fe(2), and one Sb(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Fe(1), one Fe(2), and one Sb(1) atom to form OMgFe2Sb trigonal pyramids that share  a cornercorner with one O(4)MgFeSb2 trigonal pyramid, corners with two equivalent O(5)MgFe2Sb trigonal pyramids, corners with three equivalent O(6)MgFeSb2 trigonal pyramids,  an edgeedge with one O(5)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(4)MgFeSb2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Fe(1), one Sb(1), and one Sb(2) atom to form distorted OMgFeSb2 trigonal pyramids that share  a cornercorner with one O(3)MgFe2Sb trigonal pyramid, corners with two equivalent O(6)MgFeSb2 trigonal pyramids, corners with three equivalent O(5)MgFe2Sb trigonal pyramids,  an edgeedge with one O(3)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(6)MgFeSb2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Fe(1), one Fe(2), and one Sb(1) atom to form distorted OMgFe2Sb trigonal pyramids that share  a cornercorner with one O(6)MgFeSb2 trigonal pyramid, corners with two equivalent O(3)MgFe2Sb trigonal pyramids, corners with three equivalent O(4)MgFeSb2 trigonal pyramids,  an edgeedge with one O(3)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(6)MgFeSb2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Fe(1), one Sb(1), and one Sb(2) atom to form OMgFeSb2 trigonal pyramids that share  a cornercorner with one O(5)MgFe2Sb trigonal pyramid, corners with two equivalent O(4)MgFeSb2 trigonal pyramids, corners with three equivalent O(3)MgFe2Sb trigonal pyramids,  an edgeedge with one O(5)MgFe2Sb trigonal pyramid, and  an edgeedge with one O(4)MgFeSb2 trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(2), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(2), one Sb(1), and one Sb(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe2(SbO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.973
_cell_length_b   5.891
_cell_length_c   6.058
_cell_angle_alpha   69.121
_cell_angle_beta   98.372
_cell_angle_gamma   62.142
_symmetry_Int_Tables_number   1
_cell_volume   163.023
_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  0.493  0.520  0.498  1.0
  Fe  Fe1  1  0.811  0.770  0.577  1.0
  Fe  Fe2  1  0.488  0.512  0.004  1.0
  Sb  Sb3  1  0.180  0.246  0.428  1.0
  Sb  Sb4  1  0.996  0.995  0.997  1.0
  O  O5  1  0.059  0.723  0.863  1.0
  O  O6  1  0.600  0.226  0.858  1.0
  O  O7  1  0.444  0.815  0.635  1.0
  O  O8  1  0.943  0.318  0.639  1.0
  O  O9  1  0.503  0.230  0.364  1.0
  O  O10  1  0.050  0.672  0.351  1.0
  O  O11  1  0.387  0.814  0.140  1.0
  O  O12  1  0.927  0.278  0.156  1.0
[/CIF]
.