The crystal structure described by Sr2SnFeO6 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent O(1), two equivalent O(3), four equivalent O(5), and four equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with two equivalent Sr(1)O12 cuboctahedra, corners with two equivalent Sr(2)O12 cuboctahedra, corners with eight equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, faces with two equivalent Sn(1)O6 octahedra, and faces with two equivalent Sn(3)O6 octahedra. In the second Sr site, Sr(2) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(4), and four equivalent O(6) atoms to form SrO12 cuboctahedra that share corners with two equivalent Sr(1)O12 cuboctahedra, corners with two equivalent Sr(2)O12 cuboctahedra, corners with eight equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with four equivalent Sn(2)O6 octahedra. In the third Sr site, Sr(3) is bonded to one O(1), one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, corners with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(3)O12 cuboctahedra,  a faceface with one Sn(1)O6 octahedra,  a faceface with one Sn(3)O6 octahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Sn(2)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Fe site, Fe(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(1) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Sn site, Sn(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form SnO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, faces with four equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third Sn site, Sn(3) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Sn(1), and one Sn(3) atom to form distorted OSr4Sn2 octahedra that share corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with four equivalent O(1)Sr4Sn2 octahedra, edges with four equivalent O(3)Sr4Fe2 octahedra, and faces with four equivalent O(5)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(2) is bonded to two equivalent Sr(2), two equivalent Sr(3), and two equivalent Sn(2) atoms to form distorted OSr4Sn2 octahedra that share corners with two equivalent O(1)Sr4Sn2 octahedra, corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with four equivalent O(2)Sr4Sn2 octahedra, edges with four equivalent O(3)Sr4Fe2 octahedra, and faces with four equivalent O(6)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), two equivalent Sr(3), one Fe(1), and one Fe(2) atom to form distorted OSr4Fe2 octahedra that share corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with six equivalent O(3)Sr4Fe2 octahedra, edges with two equivalent O(1)Sr4Sn2 octahedra, edges with two equivalent O(2)Sr4Sn2 octahedra, faces with two equivalent O(5)Sr4FeSn octahedra, and faces with two equivalent O(6)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Sr(2), two equivalent Sr(3), one Fe(2), and one Sn(2) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Fe(1), and one Sn(3) atom to form distorted OSr4FeSn octahedra that share  a cornercorner with one O(5)Sr4FeSn octahedra,  a cornercorner with one O(6)Sr4FeSn octahedra, corners with two equivalent O(1)Sr4Sn2 octahedra, corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(3)Sr4Fe2 octahedra,  an edgeedge with one O(5)Sr4FeSn octahedra,  an edgeedge with one O(6)Sr4FeSn octahedra,  a faceface with one O(6)Sr4FeSn octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(1)Sr4Sn2 octahedra, and faces with three equivalent O(5)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Fe(1), and one Sn(2) atom to form distorted OSr4FeSn octahedra that share  a cornercorner with one O(5)Sr4FeSn octahedra, corners with two equivalent O(1)Sr4Sn2 octahedra, corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(3)Sr4Fe2 octahedra, corners with four equivalent O(6)Sr4FeSn octahedra,  an edgeedge with one O(5)Sr4FeSn octahedra,  a faceface with one O(5)Sr4FeSn octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(6)Sr4FeSn octahedra, and faces with two equivalent O(2)Sr4Sn2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the seventh O site, O(7) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(3), one Fe(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Sr2FeSnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.073
_cell_length_b   5.689
_cell_length_c   5.696
_cell_angle_alpha   90.004
_cell_angle_beta   89.989
_cell_angle_gamma   89.988
_symmetry_Int_Tables_number   1
_cell_volume   131.964
_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
  Fe  Fe0  1  0.500  0.000  0.500  1.0
  O  O1  1  0.000  0.500  1.000  1.0
  O  O2  1  0.000  0.000  0.500  1.0
  O  O3  1  0.500  0.245  0.745  1.0
  O  O4  1  0.500  0.755  0.255  1.0
  O  O5  1  0.500  0.245  0.255  1.0
  O  O6  1  0.500  0.755  0.745  1.0
  Sn  Sn7  1  0.500  0.500  1.000  1.0
  Sr  Sr8  1  1.000  1.000  0.000  1.0
  Sr  Sr9  1  1.000  0.500  0.500  1.0
[/CIF]
.
The crystal structure described by Sr2SnFeO6 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent O(1), two equivalent O(3), four equivalent O(5), and four equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with two equivalent Sr(1)O12 cuboctahedra, corners with two equivalent Sr(2)O12 cuboctahedra, corners with eight equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, faces with two equivalent Sn(1)O6 octahedra, and faces with two equivalent Sn(3)O6 octahedra. In the second Sr site, Sr(2) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(4), and four equivalent O(6) atoms to form SrO12 cuboctahedra that share corners with two equivalent Sr(1)O12 cuboctahedra, corners with two equivalent Sr(2)O12 cuboctahedra, corners with eight equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with four equivalent Sn(2)O6 octahedra. In the third Sr site, Sr(3) is bonded to one O(1), one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, corners with four equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(3)O12 cuboctahedra,  a faceface with one Sn(1)O6 octahedra,  a faceface with one Sn(3)O6 octahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Sn(2)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Fe site, Fe(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(1) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the second Sn site, Sn(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form SnO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, faces with four equivalent Sr(2)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third Sn site, Sn(3) is bonded to two equivalent O(1) and four equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Sn(1), and one Sn(3) atom to form distorted OSr4Sn2 octahedra that share corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with four equivalent O(1)Sr4Sn2 octahedra, edges with four equivalent O(3)Sr4Fe2 octahedra, and faces with four equivalent O(5)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(2) is bonded to two equivalent Sr(2), two equivalent Sr(3), and two equivalent Sn(2) atoms to form distorted OSr4Sn2 octahedra that share corners with two equivalent O(1)Sr4Sn2 octahedra, corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with four equivalent O(2)Sr4Sn2 octahedra, edges with four equivalent O(3)Sr4Fe2 octahedra, and faces with four equivalent O(6)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), two equivalent Sr(3), one Fe(1), and one Fe(2) atom to form distorted OSr4Fe2 octahedra that share corners with four equivalent O(5)Sr4FeSn octahedra, corners with four equivalent O(6)Sr4FeSn octahedra, corners with six equivalent O(3)Sr4Fe2 octahedra, edges with two equivalent O(1)Sr4Sn2 octahedra, edges with two equivalent O(2)Sr4Sn2 octahedra, faces with two equivalent O(5)Sr4FeSn octahedra, and faces with two equivalent O(6)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Sr(2), two equivalent Sr(3), one Fe(2), and one Sn(2) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Fe(1), and one Sn(3) atom to form distorted OSr4FeSn octahedra that share  a cornercorner with one O(5)Sr4FeSn octahedra,  a cornercorner with one O(6)Sr4FeSn octahedra, corners with two equivalent O(1)Sr4Sn2 octahedra, corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(3)Sr4Fe2 octahedra,  an edgeedge with one O(5)Sr4FeSn octahedra,  an edgeedge with one O(6)Sr4FeSn octahedra,  a faceface with one O(6)Sr4FeSn octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(1)Sr4Sn2 octahedra, and faces with three equivalent O(5)Sr4FeSn octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Fe(1), and one Sn(2) atom to form distorted OSr4FeSn octahedra that share  a cornercorner with one O(5)Sr4FeSn octahedra, corners with two equivalent O(1)Sr4Sn2 octahedra, corners with two equivalent O(2)Sr4Sn2 octahedra, corners with four equivalent O(3)Sr4Fe2 octahedra, corners with four equivalent O(6)Sr4FeSn octahedra,  an edgeedge with one O(5)Sr4FeSn octahedra,  a faceface with one O(5)Sr4FeSn octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(6)Sr4FeSn octahedra, and faces with two equivalent O(2)Sr4Sn2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the seventh O site, O(7) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(3), one Fe(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Sr2FeSnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.073
_cell_length_b   5.689
_cell_length_c   5.696
_cell_angle_alpha   90.004
_cell_angle_beta   89.989
_cell_angle_gamma   89.988
_symmetry_Int_Tables_number   1
_cell_volume   131.964
_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
  Fe  Fe0  1  0.500  0.000  0.500  1.0
  O  O1  1  0.000  0.500  1.000  1.0
  O  O2  1  0.000  0.000  0.500  1.0
  O  O3  1  0.500  0.245  0.745  1.0
  O  O4  1  0.500  0.755  0.255  1.0
  O  O5  1  0.500  0.245  0.255  1.0
  O  O6  1  0.500  0.755  0.745  1.0
  Sn  Sn7  1  0.500  0.500  1.000  1.0
  Sr  Sr8  1  1.000  1.000  0.000  1.0
  Sr  Sr9  1  1.000  0.500  0.500  1.0
[/CIF]
.