The material structure described by MgFe4Sn7Si2O16 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 3-coordinate geometry to one Fe(2), one O(1), one O(3), and one O(5) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(13), one O(14), one O(15), one O(16), and one O(6) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the second Fe site, Fe(2) is bonded in a 7-coordinate geometry to one Mg(1), one Sn(1), one Sn(3), one Sn(4), one Sn(5), one Sn(6), and one Sn(7) atom. In the third Fe site, Fe(3) is bonded to one O(10), one O(11), one O(14), one O(15), one O(6), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(11), one O(13), one O(14), one O(16), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one Fe(2), one O(3), one O(7), one O(8), and one O(9) atom. In the second Sn site, Sn(2) is bonded to one O(11), one O(13), one O(15), one O(16), one O(6), and one O(8) atom to form SnO6 octahedra that share edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one Fe(2), one O(15), one O(3), one O(4), and one O(7) atom. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one Fe(2), one O(16), one O(3), one O(4), and one O(9) atom. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to one Fe(2), one O(1), one O(12), one O(13), and one O(2) atom. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to one Fe(2), one O(1), one O(12), one O(5), and one O(6) atom. In the seventh Sn site, Sn(7) is bonded in a 4-coordinate geometry to one Fe(2), one O(11), one O(12), one O(2), and one O(5) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(14), one O(2), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the second Si site, Si(2) is bonded to one O(10), one O(4), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-69°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Sn(5), one Sn(6), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(5), one Sn(7), and one Si(1) atom. In the third O site, O(3) is bonded to one Mg(1), one Sn(1), one Sn(3), and one Sn(4) atom to form corner-sharing OMgSn3 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sn(3), one Sn(4), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Sn(6), one Sn(7), and one Si(1) atom. In the sixth O site, O(6) is bonded to one Fe(1), one Fe(3), one Sn(2), and one Sn(6) atom to form distorted OFe2Sn2 tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra,  an edgeedge with one O(8)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sn(1), one Sn(3), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Fe(3), one Fe(4), one Sn(1), and one Sn(2) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra,  an edgeedge with one O(6)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Sn(1), one Sn(4), and one Si(2) atom. In the tenth O site, O(10) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Si(2) atom to form OFe3Si tetrahedra that share corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with three equivalent O(14)Fe3Si tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra, and  an edgeedge with one O(6)Fe2Sn2 tetrahedra. In the eleventh O site, O(11) is bonded to one Fe(3), one Fe(4), one Sn(2), and one Sn(7) atom to form OFe2Sn2 tetrahedra that share corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(8)Fe2Sn2 tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Sn(5), one Sn(6), and one Sn(7) atom. In the thirteenth O site, O(13) is bonded to one Fe(1), one Fe(4), one Sn(2), and one Sn(5) atom to form OFe2Sn2 tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(16)Fe2Sn2 tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(8)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the fourteenth O site, O(14) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Si(1) atom to form OFe3Si tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with three equivalent O(10)Fe3Si tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra, and  an edgeedge with one O(8)Fe2Sn2 tetrahedra. In the fifteenth O site, O(15) is bonded to one Fe(1), one Fe(3), one Sn(2), and one Sn(3) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(6)Fe2Sn2 tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. In the sixteenth O site, O(16) is bonded to one Fe(1), one Fe(4), one Sn(2), and one Sn(4) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(13)Fe2Sn2 tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(6)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe4Si2Sn7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.953
_cell_length_b   6.957
_cell_length_c   10.635
_cell_angle_alpha   90.642
_cell_angle_beta   89.270
_cell_angle_gamma   120.177
_symmetry_Int_Tables_number   1
_cell_volume   444.720
_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  0.251  0.752  0.035  1.0
  Fe  Fe1  1  0.501  0.005  0.501  1.0
  Fe  Fe2  1  0.008  0.993  0.001  1.0
  Fe  Fe3  1  0.995  0.498  0.501  1.0
  Fe  Fe4  1  0.498  0.501  0.506  1.0
  Si  Si5  1  0.342  0.660  0.262  1.0
  Si  Si6  1  0.660  0.338  0.738  1.0
  Sn  Sn7  1  0.156  0.329  0.805  1.0
  Sn  Sn8  1  0.997  0.002  0.501  1.0
  Sn  Sn9  1  0.150  0.846  0.786  1.0
  Sn  Sn10  1  0.671  0.842  0.805  1.0
  Sn  Sn11  1  0.329  0.169  0.206  1.0
  Sn  Sn12  1  0.844  0.158  0.195  1.0
  Sn  Sn13  1  0.832  0.671  0.206  1.0
  O  O14  1  0.465  0.899  0.186  1.0
  O  O15  1  0.470  0.530  0.216  1.0
  O  O16  1  0.323  0.676  0.865  1.0
  O  O17  1  0.529  0.079  0.787  1.0
  O  O18  1  0.102  0.540  0.187  1.0
  O  O19  1  0.845  0.156  0.398  1.0
  O  O20  1  0.919  0.469  0.786  1.0
  O  O21  1  0.152  0.320  0.600  1.0
  O  O22  1  0.529  0.469  0.782  1.0
  O  O23  1  0.662  0.334  0.581  1.0
  O  O24  1  0.844  0.684  0.406  1.0
  O  O25  1  0.674  0.326  0.191  1.0
  O  O26  1  0.314  0.157  0.406  1.0
  O  O27  1  0.335  0.670  0.414  1.0
  O  O28  1  0.160  0.838  0.590  1.0
  O  O29  1  0.681  0.848  0.600  1.0
[/CIF]
.
The material structure described by MgFe4Sn7Si2O16 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 3-coordinate geometry to one Fe(2), one O(1), one O(3), and one O(5) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(13), one O(14), one O(15), one O(16), and one O(6) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the second Fe site, Fe(2) is bonded in a 7-coordinate geometry to one Mg(1), one Sn(1), one Sn(3), one Sn(4), one Sn(5), one Sn(6), and one Sn(7) atom. In the third Fe site, Fe(3) is bonded to one O(10), one O(11), one O(14), one O(15), one O(6), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(11), one O(13), one O(14), one O(16), and one O(8) atom to form distorted FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one Fe(2), one O(3), one O(7), one O(8), and one O(9) atom. In the second Sn site, Sn(2) is bonded to one O(11), one O(13), one O(15), one O(16), one O(6), and one O(8) atom to form SnO6 octahedra that share edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one Fe(2), one O(15), one O(3), one O(4), and one O(7) atom. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one Fe(2), one O(16), one O(3), one O(4), and one O(9) atom. In the fifth Sn site, Sn(5) is bonded in a 4-coordinate geometry to one Fe(2), one O(1), one O(12), one O(13), and one O(2) atom. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to one Fe(2), one O(1), one O(12), one O(5), and one O(6) atom. In the seventh Sn site, Sn(7) is bonded in a 4-coordinate geometry to one Fe(2), one O(11), one O(12), one O(2), and one O(5) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(14), one O(2), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the second Si site, Si(2) is bonded to one O(10), one O(4), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, and  a cornercorner with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 66-69°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Sn(5), one Sn(6), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(5), one Sn(7), and one Si(1) atom. In the third O site, O(3) is bonded to one Mg(1), one Sn(1), one Sn(3), and one Sn(4) atom to form corner-sharing OMgSn3 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sn(3), one Sn(4), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Sn(6), one Sn(7), and one Si(1) atom. In the sixth O site, O(6) is bonded to one Fe(1), one Fe(3), one Sn(2), and one Sn(6) atom to form distorted OFe2Sn2 tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra,  an edgeedge with one O(8)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sn(1), one Sn(3), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Fe(3), one Fe(4), one Sn(1), and one Sn(2) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra,  an edgeedge with one O(6)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Sn(1), one Sn(4), and one Si(2) atom. In the tenth O site, O(10) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Si(2) atom to form OFe3Si tetrahedra that share corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with three equivalent O(14)Fe3Si tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra, and  an edgeedge with one O(6)Fe2Sn2 tetrahedra. In the eleventh O site, O(11) is bonded to one Fe(3), one Fe(4), one Sn(2), and one Sn(7) atom to form OFe2Sn2 tetrahedra that share corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(8)Fe2Sn2 tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Sn(5), one Sn(6), and one Sn(7) atom. In the thirteenth O site, O(13) is bonded to one Fe(1), one Fe(4), one Sn(2), and one Sn(5) atom to form OFe2Sn2 tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with two equivalent O(14)Fe3Si tetrahedra, corners with three equivalent O(16)Fe2Sn2 tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(8)Fe2Sn2 tetrahedra, and  an edgeedge with one O(10)Fe3Si tetrahedra. In the fourteenth O site, O(14) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Si(1) atom to form OFe3Si tetrahedra that share corners with two equivalent O(11)Fe2Sn2 tetrahedra, corners with two equivalent O(13)Fe2Sn2 tetrahedra, corners with two equivalent O(6)Fe2Sn2 tetrahedra, corners with three equivalent O(10)Fe3Si tetrahedra,  an edgeedge with one O(15)Fe2Sn2 tetrahedra,  an edgeedge with one O(16)Fe2Sn2 tetrahedra, and  an edgeedge with one O(8)Fe2Sn2 tetrahedra. In the fifteenth O site, O(15) is bonded to one Fe(1), one Fe(3), one Sn(2), and one Sn(3) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(16)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(6)Fe2Sn2 tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(13)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. In the sixteenth O site, O(16) is bonded to one Fe(1), one Fe(4), one Sn(2), and one Sn(4) atom to form OFe2Sn2 tetrahedra that share  a cornercorner with one O(3)MgSn3 tetrahedra, corners with two equivalent O(15)Fe2Sn2 tetrahedra, corners with two equivalent O(8)Fe2Sn2 tetrahedra, corners with two equivalent O(10)Fe3Si tetrahedra, corners with three equivalent O(13)Fe2Sn2 tetrahedra,  an edgeedge with one O(11)Fe2Sn2 tetrahedra,  an edgeedge with one O(6)Fe2Sn2 tetrahedra, and  an edgeedge with one O(14)Fe3Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe4Si2Sn7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.953
_cell_length_b   6.957
_cell_length_c   10.635
_cell_angle_alpha   90.642
_cell_angle_beta   89.270
_cell_angle_gamma   120.177
_symmetry_Int_Tables_number   1
_cell_volume   444.720
_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  0.251  0.752  0.035  1.0
  Fe  Fe1  1  0.501  0.005  0.501  1.0
  Fe  Fe2  1  0.008  0.993  0.001  1.0
  Fe  Fe3  1  0.995  0.498  0.501  1.0
  Fe  Fe4  1  0.498  0.501  0.506  1.0
  Si  Si5  1  0.342  0.660  0.262  1.0
  Si  Si6  1  0.660  0.338  0.738  1.0
  Sn  Sn7  1  0.156  0.329  0.805  1.0
  Sn  Sn8  1  0.997  0.002  0.501  1.0
  Sn  Sn9  1  0.150  0.846  0.786  1.0
  Sn  Sn10  1  0.671  0.842  0.805  1.0
  Sn  Sn11  1  0.329  0.169  0.206  1.0
  Sn  Sn12  1  0.844  0.158  0.195  1.0
  Sn  Sn13  1  0.832  0.671  0.206  1.0
  O  O14  1  0.465  0.899  0.186  1.0
  O  O15  1  0.470  0.530  0.216  1.0
  O  O16  1  0.323  0.676  0.865  1.0
  O  O17  1  0.529  0.079  0.787  1.0
  O  O18  1  0.102  0.540  0.187  1.0
  O  O19  1  0.845  0.156  0.398  1.0
  O  O20  1  0.919  0.469  0.786  1.0
  O  O21  1  0.152  0.320  0.600  1.0
  O  O22  1  0.529  0.469  0.782  1.0
  O  O23  1  0.662  0.334  0.581  1.0
  O  O24  1  0.844  0.684  0.406  1.0
  O  O25  1  0.674  0.326  0.191  1.0
  O  O26  1  0.314  0.157  0.406  1.0
  O  O27  1  0.335  0.670  0.414  1.0
  O  O28  1  0.160  0.838  0.590  1.0
  O  O29  1  0.681  0.848  0.600  1.0
[/CIF]
.