The structure described by Sr4MgIn2(SbO6)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(4), one O(5), one O(6), one O(9), and two equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(2), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(5), one O(7), and one O(8) atom. Mg(1) is bonded in a distorted trigonal planar geometry to one Sb(1), one O(1), one O(12), and one O(8) atom. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(1), one O(10), one O(12), one O(3), and one O(4) atom to form distorted InO5 square pyramids that share  a cornercorner with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 34°. In the second In site, In(2) is bonded to one O(11), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form InO6 octahedra that share corners with four equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-22°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 5-coordinate geometry to one Mg(1), one O(10), one O(12), one O(4), and one O(6) atom. In the second Sb site, Sb(2) is bonded to one O(11), one O(2), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent In(2)O6 octahedra and  a cornercorner with one In(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 15-22°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sr(4), one Mg(1), and one In(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one In(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), one In(1), and one Sb(1) atom to form distorted edge-sharing OSr2InSb tetrahedra. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(2), one In(2), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Sr(4), two equivalent Sr(3), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), and one In(2) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one In(2), and one Sb(2) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(2), one In(1), and one Sb(1) atom to form distorted edge-sharing OSr2InSb trigonal pyramids. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(3), one Mg(1), one In(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Sr4MgIn2(SbO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.974
_cell_length_b   5.832
_cell_length_c   9.739
_cell_angle_alpha   91.878
_cell_angle_beta   99.619
_cell_angle_gamma   89.103
_symmetry_Int_Tables_number   1
_cell_volume   334.351
_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
  Sr  Sr0  1  0.959  0.017  0.783  1.0
  Sr  Sr1  1  0.464  0.536  0.788  1.0
  Sr  Sr2  1  0.093  0.034  0.176  1.0
  Sr  Sr3  1  0.549  0.481  0.181  1.0
  Mg  Mg4  1  0.699  0.947  0.374  1.0
  In  In5  1  0.952  0.462  0.536  1.0
  In  In6  1  0.516  0.010  0.978  1.0
  Sb  Sb7  1  0.334  0.006  0.555  1.0
  Sb  Sb8  1  0.008  0.512  0.977  1.0
  O  O9  1  0.686  0.627  0.418  1.0
  O  O10  1  0.751  0.726  0.011  1.0
  O  O11  1  0.873  0.491  0.769  1.0
  O  O12  1  0.210  0.264  0.651  1.0
  O  O13  1  0.264  0.285  0.953  1.0
  O  O14  1  0.543  0.967  0.745  1.0
  O  O15  1  0.127  0.523  0.179  1.0
  O  O16  1  0.512  0.039  0.202  1.0
  O  O17  1  0.216  0.776  0.948  1.0
  O  O18  1  0.157  0.755  0.608  1.0
  O  O19  1  0.803  0.243  0.001  1.0
  O  O20  1  0.973  0.131  0.411  1.0
[/CIF]
.
The structure described by Sr4MgIn2(SbO6)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(4), one O(5), one O(6), one O(9), and two equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(2), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(5), one O(7), and one O(8) atom. Mg(1) is bonded in a distorted trigonal planar geometry to one Sb(1), one O(1), one O(12), and one O(8) atom. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(1), one O(10), one O(12), one O(3), and one O(4) atom to form distorted InO5 square pyramids that share  a cornercorner with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 34°. In the second In site, In(2) is bonded to one O(11), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form InO6 octahedra that share corners with four equivalent Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-22°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 5-coordinate geometry to one Mg(1), one O(10), one O(12), one O(4), and one O(6) atom. In the second Sb site, Sb(2) is bonded to one O(11), one O(2), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent In(2)O6 octahedra and  a cornercorner with one In(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 15-22°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sr(4), one Mg(1), and one In(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Sr(2), two equivalent Sr(1), one In(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), one In(1), and one Sb(1) atom to form distorted edge-sharing OSr2InSb tetrahedra. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(2), one In(2), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Sr(4), two equivalent Sr(3), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), and one In(2) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one In(2), and one Sb(2) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(2), one In(1), and one Sb(1) atom to form distorted edge-sharing OSr2InSb trigonal pyramids. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one In(2), and one Sb(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(3), one Mg(1), one In(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Sr4MgIn2(SbO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.974
_cell_length_b   5.832
_cell_length_c   9.739
_cell_angle_alpha   91.878
_cell_angle_beta   99.619
_cell_angle_gamma   89.103
_symmetry_Int_Tables_number   1
_cell_volume   334.351
_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
  Sr  Sr0  1  0.959  0.017  0.783  1.0
  Sr  Sr1  1  0.464  0.536  0.788  1.0
  Sr  Sr2  1  0.093  0.034  0.176  1.0
  Sr  Sr3  1  0.549  0.481  0.181  1.0
  Mg  Mg4  1  0.699  0.947  0.374  1.0
  In  In5  1  0.952  0.462  0.536  1.0
  In  In6  1  0.516  0.010  0.978  1.0
  Sb  Sb7  1  0.334  0.006  0.555  1.0
  Sb  Sb8  1  0.008  0.512  0.977  1.0
  O  O9  1  0.686  0.627  0.418  1.0
  O  O10  1  0.751  0.726  0.011  1.0
  O  O11  1  0.873  0.491  0.769  1.0
  O  O12  1  0.210  0.264  0.651  1.0
  O  O13  1  0.264  0.285  0.953  1.0
  O  O14  1  0.543  0.967  0.745  1.0
  O  O15  1  0.127  0.523  0.179  1.0
  O  O16  1  0.512  0.039  0.202  1.0
  O  O17  1  0.216  0.776  0.948  1.0
  O  O18  1  0.157  0.755  0.608  1.0
  O  O19  1  0.803  0.243  0.001  1.0
  O  O20  1  0.973  0.131  0.411  1.0
[/CIF]
.