The crystal structure described by Sr4MgCr2(SO3)2 crystallizes in the tetragonal P-4m2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to four equivalent S(1), two equivalent O(1), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), and five equivalent O(3) atoms. In the third Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), and five equivalent O(3) atoms. Mg(1) is bonded to four equivalent S(1) atoms to form corner-sharing MgS4 tetrahedra. Cr(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing CrO5 square pyramids. S(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1) and two equivalent Mg(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form distorted OSr4Cr2 octahedra that share corners with two equivalent O(1)Sr4Cr2 octahedra, corners with six equivalent O(3)Sr5Cr octahedra, edges with two equivalent O(1)Sr4Cr2 octahedra, faces with two equivalent O(3)Sr5Cr octahedra, and faces with four equivalent O(2)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 16-55°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form distorted OSr4Cr2 octahedra that share corners with two equivalent O(2)Sr4Cr2 octahedra, corners with six equivalent O(3)Sr5Cr octahedra, edges with two equivalent O(2)Sr4Cr2 octahedra, faces with two equivalent O(3)Sr5Cr octahedra, and faces with four equivalent O(1)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 17-55°. In the third O site, O(3) is bonded to five Sr(2,2) and one Cr(1) atom to form distorted OSr5Cr octahedra that share corners with four equivalent O(3)Sr5Cr octahedra, corners with six equivalent O(1)Sr4Cr2 octahedra, corners with six equivalent O(2)Sr4Cr2 octahedra, edges with eight equivalent O(3)Sr5Cr octahedra, faces with two equivalent O(1)Sr4Cr2 octahedra, and faces with two equivalent O(2)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 11-55°. is represented by the CIF card [CIF]
data_Sr4MgCr2(SO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.947
_cell_length_b   3.947
_cell_length_c   15.918
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   247.970
_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  0.500  0.000  0.191  1.0
  Sr  Sr1  1  0.000  0.500  0.809  1.0
  Sr  Sr2  1  0.500  0.000  0.414  1.0
  Sr  Sr3  1  0.000  0.500  0.586  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Cr  Cr5  1  0.000  0.500  0.311  1.0
  Cr  Cr6  1  0.500  0.000  0.689  1.0
  S  S7  1  0.000  0.500  0.097  1.0
  S  S8  1  0.500  0.000  0.903  1.0
  O  O9  1  0.500  0.500  0.293  1.0
  O  O10  1  0.000  0.000  0.292  1.0
  O  O11  1  0.000  0.000  0.708  1.0
  O  O12  1  0.500  0.500  0.707  1.0
  O  O13  1  0.000  0.500  0.431  1.0
  O  O14  1  0.500  0.000  0.569  1.0
[/CIF]
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The crystal structure described by Sr4MgCr2(SO3)2 crystallizes in the tetragonal P-4m2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to four equivalent S(1), two equivalent O(1), and two equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), and five equivalent O(3) atoms. In the third Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), and five equivalent O(3) atoms. Mg(1) is bonded to four equivalent S(1) atoms to form corner-sharing MgS4 tetrahedra. Cr(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing CrO5 square pyramids. S(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1) and two equivalent Mg(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form distorted OSr4Cr2 octahedra that share corners with two equivalent O(1)Sr4Cr2 octahedra, corners with six equivalent O(3)Sr5Cr octahedra, edges with two equivalent O(1)Sr4Cr2 octahedra, faces with two equivalent O(3)Sr5Cr octahedra, and faces with four equivalent O(2)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 16-55°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form distorted OSr4Cr2 octahedra that share corners with two equivalent O(2)Sr4Cr2 octahedra, corners with six equivalent O(3)Sr5Cr octahedra, edges with two equivalent O(2)Sr4Cr2 octahedra, faces with two equivalent O(3)Sr5Cr octahedra, and faces with four equivalent O(1)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 17-55°. In the third O site, O(3) is bonded to five Sr(2,2) and one Cr(1) atom to form distorted OSr5Cr octahedra that share corners with four equivalent O(3)Sr5Cr octahedra, corners with six equivalent O(1)Sr4Cr2 octahedra, corners with six equivalent O(2)Sr4Cr2 octahedra, edges with eight equivalent O(3)Sr5Cr octahedra, faces with two equivalent O(1)Sr4Cr2 octahedra, and faces with two equivalent O(2)Sr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 11-55°. is represented by the CIF card [CIF]
data_Sr4MgCr2(SO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.947
_cell_length_b   3.947
_cell_length_c   15.918
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   247.970
_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  0.500  0.000  0.191  1.0
  Sr  Sr1  1  0.000  0.500  0.809  1.0
  Sr  Sr2  1  0.500  0.000  0.414  1.0
  Sr  Sr3  1  0.000  0.500  0.586  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Cr  Cr5  1  0.000  0.500  0.311  1.0
  Cr  Cr6  1  0.500  0.000  0.689  1.0
  S  S7  1  0.000  0.500  0.097  1.0
  S  S8  1  0.500  0.000  0.903  1.0
  O  O9  1  0.500  0.500  0.293  1.0
  O  O10  1  0.000  0.000  0.292  1.0
  O  O11  1  0.000  0.000  0.708  1.0
  O  O12  1  0.500  0.500  0.707  1.0
  O  O13  1  0.000  0.500  0.431  1.0
  O  O14  1  0.500  0.000  0.569  1.0
[/CIF]
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