The material structure described by MgCr2(SbO3)4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(4)O6 octahedra, edges with two equivalent Sb(2)O6 octahedra, edges with two equivalent Sb(3)O6 octahedra, and faces with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-48°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with four equivalent Sb(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(4)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-56°. In the second Cr site, Cr(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form CrO6 octahedra that share corners with four equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-55°. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form distorted SbO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the third Sb site, Sb(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-60°. In the fourth Sb site, Sb(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-60°. There are six 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 Sb(2), and one Sb(4) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(2), one Sb(1), and one Sb(4) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Cr(1), one Sb(1), and one Sb(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cr(2), one Sb(1), and one Sb(3) atom. In the fifth O site, O(5) is bonded to one Mg(1), one Cr(1), one Sb(2), and one Sb(3) atom to form a mixture of distorted edge and corner-sharing OMgCrSb2 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Cr(2), one Sb(2), and one Sb(4) atom. is represented by the CIF card [CIF]
data_MgCr2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.019
_cell_length_b   5.015
_cell_length_c   9.598
_cell_angle_alpha   90.008
_cell_angle_beta   90.002
_cell_angle_gamma   90.955
_symmetry_Int_Tables_number   1
_cell_volume   241.553
_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  0.000  0.500  0.989  1.0
  Cr  Cr1  1  0.000  0.000  0.005  1.0
  Cr  Cr2  1  0.500  0.500  0.493  1.0
  Sb  Sb3  1  1.000  1.000  0.340  1.0
  Sb  Sb4  1  0.500  0.500  0.810  1.0
  Sb  Sb5  1  0.500  0.500  0.167  1.0
  Sb  Sb6  1  1.000  1.000  0.667  1.0
  O  O7  1  0.141  0.788  0.836  1.0
  O  O8  1  0.186  0.800  0.511  1.0
  O  O9  1  0.183  0.743  0.137  1.0
  O  O10  1  0.335  0.309  0.332  1.0
  O  O11  1  0.310  0.272  0.015  1.0
  O  O12  1  0.309  0.282  0.652  1.0
  O  O13  1  0.665  0.691  0.332  1.0
  O  O14  1  0.690  0.728  0.015  1.0
  O  O15  1  0.691  0.718  0.652  1.0
  O  O16  1  0.860  0.212  0.836  1.0
  O  O17  1  0.814  0.200  0.511  1.0
  O  O18  1  0.817  0.257  0.137  1.0
[/CIF]
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The material structure described by MgCr2(SbO3)4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(4)O6 octahedra, edges with two equivalent Sb(2)O6 octahedra, edges with two equivalent Sb(3)O6 octahedra, and faces with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-48°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with four equivalent Sb(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(4)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-56°. In the second Cr site, Cr(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form CrO6 octahedra that share corners with four equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-55°. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form distorted SbO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the third Sb site, Sb(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-60°. In the fourth Sb site, Sb(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(6) atoms to form SbO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cr(2)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-60°. There are six 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 Sb(2), and one Sb(4) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(2), one Sb(1), and one Sb(4) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Cr(1), one Sb(1), and one Sb(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cr(2), one Sb(1), and one Sb(3) atom. In the fifth O site, O(5) is bonded to one Mg(1), one Cr(1), one Sb(2), and one Sb(3) atom to form a mixture of distorted edge and corner-sharing OMgCrSb2 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Cr(2), one Sb(2), and one Sb(4) atom. is represented by the CIF card [CIF]
data_MgCr2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.019
_cell_length_b   5.015
_cell_length_c   9.598
_cell_angle_alpha   90.008
_cell_angle_beta   90.002
_cell_angle_gamma   90.955
_symmetry_Int_Tables_number   1
_cell_volume   241.553
_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  0.000  0.500  0.989  1.0
  Cr  Cr1  1  0.000  0.000  0.005  1.0
  Cr  Cr2  1  0.500  0.500  0.493  1.0
  Sb  Sb3  1  1.000  1.000  0.340  1.0
  Sb  Sb4  1  0.500  0.500  0.810  1.0
  Sb  Sb5  1  0.500  0.500  0.167  1.0
  Sb  Sb6  1  1.000  1.000  0.667  1.0
  O  O7  1  0.141  0.788  0.836  1.0
  O  O8  1  0.186  0.800  0.511  1.0
  O  O9  1  0.183  0.743  0.137  1.0
  O  O10  1  0.335  0.309  0.332  1.0
  O  O11  1  0.310  0.272  0.015  1.0
  O  O12  1  0.309  0.282  0.652  1.0
  O  O13  1  0.665  0.691  0.332  1.0
  O  O14  1  0.690  0.728  0.015  1.0
  O  O15  1  0.691  0.718  0.652  1.0
  O  O16  1  0.860  0.212  0.836  1.0
  O  O17  1  0.814  0.200  0.511  1.0
  O  O18  1  0.817  0.257  0.137  1.0
[/CIF]
.