The material described by Fe13Si2(SbO14)2 crystallizes in the triclinic P-1 space group. There are seven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(2), one O(7), and one O(8) atom. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(3), and one O(7) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(3)O5 trigonal bipyramid, and  an edgeedge with one Fe(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-63°. In the third Fe site, Fe(3) is bonded to one O(1), one O(11), one O(13), one O(14), and one O(8) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(5)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 52-70°. In the fourth Fe site, Fe(4) is bonded to one O(12), one O(13), two equivalent O(5), and two equivalent O(9) atoms to form distorted FeO6 octahedra that share  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(7)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(11), one O(3), one O(6), one O(7), and one O(8) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid, corners with two equivalent Fe(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-65°. In the sixth Fe site, Fe(6) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with two equivalent Fe(5)O5 trigonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Fe(7)O6 octahedra. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(12), one O(13), one O(6), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(7)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Si(1) is bonded to one O(11), one O(3), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(6)O6 octahedra, corners with two equivalent Fe(7)O6 octahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, corners with three equivalent Fe(2)O5 trigonal bipyramids, and corners with three equivalent Fe(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 59-63°. Sb(1) is bonded to one O(10), one O(12), one O(13), one O(5), one O(6), and one O(9) atom to form SbO6 octahedra that share  a cornercorner with one Fe(2)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(6)O6 octahedra, edges with two equivalent Fe(7)O6 octahedra, and edges with three equivalent Fe(4)O6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Fe(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(5), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Fe(6), two equivalent Fe(7), and one Si(1) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(4)Fe3Si tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(6)Fe3Sb tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra,  an edgeedge with one O(6)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(4) and one Sb(1) atom. In the sixth O site, O(6) is bonded to one Fe(5), one Fe(6), one Fe(7), and one Sb(1) atom to form OFe3Sb tetrahedra that share  a cornercorner with one O(6)Fe3Sb tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(2), one Fe(5), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(4) and one Sb(1) atom. In the tenth O site, O(10) is bonded to one Fe(2), one Fe(6), one Fe(7), and one Sb(1) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra, corners with two equivalent O(6)Fe3Sb tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra,  an edgeedge with one O(6)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(3), one Fe(5), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(4), one Fe(7), and one Sb(1) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Fe(3), one Fe(4), one Fe(7), and one Sb(1) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one Fe(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe13Si2(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.624
_cell_length_b   8.812
_cell_length_c   11.492
_cell_angle_alpha   87.197
_cell_angle_beta   75.956
_cell_angle_gamma   78.517
_symmetry_Int_Tables_number   1
_cell_volume   541.410
_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  0.965  0.636  0.679  1.0
  Fe  Fe1  1  0.648  0.355  0.146  1.0
  Fe  Fe2  1  0.361  0.361  0.682  1.0
  Fe  Fe3  1  0.035  0.364  0.321  1.0
  Fe  Fe4  1  0.352  0.645  0.854  1.0
  Fe  Fe5  1  0.284  0.995  0.437  1.0
  Fe  Fe6  1  0.206  0.644  0.153  1.0
  Fe  Fe7  1  0.000  0.000  0.000  1.0
  Fe  Fe8  1  0.422  0.001  0.150  1.0
  Fe  Fe9  1  0.794  0.356  0.847  1.0
  Fe  Fe10  1  0.639  0.639  0.318  1.0
  Fe  Fe11  1  0.578  0.999  0.850  1.0
  Fe  Fe12  1  0.716  0.005  0.563  1.0
  Si  Si13  1  0.233  0.314  0.001  1.0
  Si  Si14  1  0.767  0.686  0.999  1.0
  Sb  Sb15  1  0.855  0.001  0.289  1.0
  Sb  Sb16  1  0.145  0.999  0.711  1.0
  O  O17  1  0.702  0.407  0.291  1.0
  O  O18  1  0.214  0.351  0.418  1.0
  O  O19  1  0.930  0.356  0.008  1.0
  O  O20  1  0.304  0.123  0.999  1.0
  O  O21  1  0.786  0.649  0.582  1.0
  O  O22  1  0.298  0.593  0.709  1.0
  O  O23  1  0.008  0.100  0.577  1.0
  O  O24  1  0.992  0.900  0.423  1.0
  O  O25  1  0.696  0.877  0.001  1.0
  O  O26  1  0.115  0.886  0.155  1.0
  O  O27  1  0.307  0.378  0.120  1.0
  O  O28  1  0.988  0.586  0.298  1.0
  O  O29  1  0.420  0.896  0.578  1.0
  O  O30  1  0.721  0.125  0.156  1.0
  O  O31  1  0.596  0.615  0.120  1.0
  O  O32  1  0.070  0.644  0.992  1.0
  O  O33  1  0.279  0.875  0.844  1.0
  O  O34  1  0.885  0.114  0.845  1.0
  O  O35  1  0.580  0.104  0.422  1.0
  O  O36  1  0.119  0.135  0.289  1.0
  O  O37  1  0.881  0.865  0.711  1.0
  O  O38  1  0.404  0.385  0.880  1.0
  O  O39  1  0.412  0.130  0.713  1.0
  O  O40  1  0.629  0.347  0.579  1.0
  O  O41  1  0.693  0.622  0.880  1.0
  O  O42  1  0.588  0.870  0.287  1.0
  O  O43  1  0.012  0.414  0.702  1.0
  O  O44  1  0.371  0.653  0.421  1.0
[/CIF]
.
The material described by Fe13Si2(SbO14)2 crystallizes in the triclinic P-1 space group. There are seven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(2), one O(7), and one O(8) atom. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(3), and one O(7) atom to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(3)O5 trigonal bipyramid, and  an edgeedge with one Fe(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-63°. In the third Fe site, Fe(3) is bonded to one O(1), one O(11), one O(13), one O(14), and one O(8) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Fe(5)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 52-70°. In the fourth Fe site, Fe(4) is bonded to one O(12), one O(13), two equivalent O(5), and two equivalent O(9) atoms to form distorted FeO6 octahedra that share  a cornercorner with one Fe(3)O5 trigonal bipyramid,  an edgeedge with one Fe(7)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(11), one O(3), one O(6), one O(7), and one O(8) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid, corners with two equivalent Fe(3)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 59-65°. In the sixth Fe site, Fe(6) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with two equivalent Fe(5)O5 trigonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Fe(7)O6 octahedra. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(12), one O(13), one O(6), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(7)O6 octahedra, edges with two equivalent Fe(6)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. Si(1) is bonded to one O(11), one O(3), one O(4), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(6)O6 octahedra, corners with two equivalent Fe(7)O6 octahedra,  a cornercorner with one Fe(3)O5 trigonal bipyramid, corners with three equivalent Fe(2)O5 trigonal bipyramids, and corners with three equivalent Fe(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 59-63°. Sb(1) is bonded to one O(10), one O(12), one O(13), one O(5), one O(6), and one O(9) atom to form SbO6 octahedra that share  a cornercorner with one Fe(2)O5 trigonal bipyramid,  a cornercorner with one Fe(3)O5 trigonal bipyramid,  a cornercorner with one Fe(5)O5 trigonal bipyramid,  an edgeedge with one Fe(6)O6 octahedra, edges with two equivalent Fe(7)O6 octahedra, and edges with three equivalent Fe(4)O6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Fe(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(5), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Fe(6), two equivalent Fe(7), and one Si(1) atom to form distorted OFe3Si tetrahedra that share  a cornercorner with one O(4)Fe3Si tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(6)Fe3Sb tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra,  an edgeedge with one O(6)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(4) and one Sb(1) atom. In the sixth O site, O(6) is bonded to one Fe(5), one Fe(6), one Fe(7), and one Sb(1) atom to form OFe3Sb tetrahedra that share  a cornercorner with one O(6)Fe3Sb tetrahedra, corners with two equivalent O(10)Fe3Sb tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra,  an edgeedge with one O(10)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(2), one Fe(5), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to two equivalent Fe(4) and one Sb(1) atom. In the tenth O site, O(10) is bonded to one Fe(2), one Fe(6), one Fe(7), and one Sb(1) atom to form distorted OFe3Sb tetrahedra that share  a cornercorner with one O(10)Fe3Sb tetrahedra, corners with two equivalent O(6)Fe3Sb tetrahedra, corners with two equivalent O(4)Fe3Si tetrahedra,  an edgeedge with one O(6)Fe3Sb tetrahedra, and  an edgeedge with one O(4)Fe3Si tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(3), one Fe(5), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(4), one Fe(7), and one Sb(1) atom. In the thirteenth O site, O(13) is bonded in a rectangular see-saw-like geometry to one Fe(3), one Fe(4), one Fe(7), and one Sb(1) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one Fe(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe13Si2(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.624
_cell_length_b   8.812
_cell_length_c   11.492
_cell_angle_alpha   87.197
_cell_angle_beta   75.956
_cell_angle_gamma   78.517
_symmetry_Int_Tables_number   1
_cell_volume   541.410
_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  0.965  0.636  0.679  1.0
  Fe  Fe1  1  0.648  0.355  0.146  1.0
  Fe  Fe2  1  0.361  0.361  0.682  1.0
  Fe  Fe3  1  0.035  0.364  0.321  1.0
  Fe  Fe4  1  0.352  0.645  0.854  1.0
  Fe  Fe5  1  0.284  0.995  0.437  1.0
  Fe  Fe6  1  0.206  0.644  0.153  1.0
  Fe  Fe7  1  0.000  0.000  0.000  1.0
  Fe  Fe8  1  0.422  0.001  0.150  1.0
  Fe  Fe9  1  0.794  0.356  0.847  1.0
  Fe  Fe10  1  0.639  0.639  0.318  1.0
  Fe  Fe11  1  0.578  0.999  0.850  1.0
  Fe  Fe12  1  0.716  0.005  0.563  1.0
  Si  Si13  1  0.233  0.314  0.001  1.0
  Si  Si14  1  0.767  0.686  0.999  1.0
  Sb  Sb15  1  0.855  0.001  0.289  1.0
  Sb  Sb16  1  0.145  0.999  0.711  1.0
  O  O17  1  0.702  0.407  0.291  1.0
  O  O18  1  0.214  0.351  0.418  1.0
  O  O19  1  0.930  0.356  0.008  1.0
  O  O20  1  0.304  0.123  0.999  1.0
  O  O21  1  0.786  0.649  0.582  1.0
  O  O22  1  0.298  0.593  0.709  1.0
  O  O23  1  0.008  0.100  0.577  1.0
  O  O24  1  0.992  0.900  0.423  1.0
  O  O25  1  0.696  0.877  0.001  1.0
  O  O26  1  0.115  0.886  0.155  1.0
  O  O27  1  0.307  0.378  0.120  1.0
  O  O28  1  0.988  0.586  0.298  1.0
  O  O29  1  0.420  0.896  0.578  1.0
  O  O30  1  0.721  0.125  0.156  1.0
  O  O31  1  0.596  0.615  0.120  1.0
  O  O32  1  0.070  0.644  0.992  1.0
  O  O33  1  0.279  0.875  0.844  1.0
  O  O34  1  0.885  0.114  0.845  1.0
  O  O35  1  0.580  0.104  0.422  1.0
  O  O36  1  0.119  0.135  0.289  1.0
  O  O37  1  0.881  0.865  0.711  1.0
  O  O38  1  0.404  0.385  0.880  1.0
  O  O39  1  0.412  0.130  0.713  1.0
  O  O40  1  0.629  0.347  0.579  1.0
  O  O41  1  0.693  0.622  0.880  1.0
  O  O42  1  0.588  0.870  0.287  1.0
  O  O43  1  0.012  0.414  0.702  1.0
  O  O44  1  0.371  0.653  0.421  1.0
[/CIF]
.