The structure described by Si2Bi13(SbO14)2 crystallizes in the triclinic P1 space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(22), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, corners with two equivalent Bi(10)O5 trigonal bipyramids, and corners with two equivalent Bi(2)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(15), one O(16), one O(25), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(2)O5 trigonal bipyramid, corners with two equivalent Bi(5)O5 trigonal bipyramids, and corners with two equivalent Bi(7)O5 trigonal bipyramids. There are thirteen inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(28), one O(5), and one O(6) atom. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(14), one O(15), and one O(3) atom to form BiO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Bi(10)O5 trigonal bipyramid, and  an edgeedge with one Bi(7)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 58°. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(2), one O(22), one O(23), one O(24), one O(27), and one O(6) atom. In the fourth Bi site, Bi(4) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(24), and one O(5) atom. In the fifth Bi site, Bi(5) is bonded to one O(16), one O(17), one O(22), one O(25), and one O(6) atom to form BiO5 trigonal bipyramids that share  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Bi(7)O5 trigonal bipyramid, and  an edgeedge with one Bi(10)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 59°. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(26), one O(28), one O(7), and one O(8) atom. In the seventh Bi site, Bi(7) is bonded to one O(10), one O(11), one O(12), one O(15), and one O(16) atom to form distorted BiO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Bi(5)O5 trigonal bipyramid, and  an edgeedge with one Bi(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. In the eighth Bi site, Bi(8) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(14), one O(17), and one O(18) atom. In the ninth Bi site, Bi(9) is bonded to one O(10), one O(14), one O(20), one O(26), one O(4), and one O(9) atom to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Bi(2)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, edges with two equivalent Sb(1)O6 octahedra, and  an edgeedge with one Bi(12)O6 pentagonal pyramid. In the tenth Bi site, Bi(10) is bonded to one O(18), one O(22), one O(25), one O(27), and one O(3) atom to form distorted BiO5 trigonal bipyramids that share  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Bi(2)O5 trigonal bipyramid, and  an edgeedge with one Bi(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 44°. In the eleventh Bi site, Bi(11) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(15), one O(26), one O(28), and one O(5) atom. In the twelfth Bi site, Bi(12) is bonded to one O(17), one O(18), one O(21), one O(23), one O(4), and one O(9) atom to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid, edges with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Bi(9)O6 pentagonal pyramid. In the thirteenth Bi site, Bi(13) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(23), one O(24), one O(7), and one O(8) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(14), one O(19), one O(20), one O(26), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Bi(2)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, and edges with two equivalent Bi(9)O6 pentagonal pyramids. In the second Sb site, Sb(2) is bonded to one O(13), one O(17), one O(18), one O(21), one O(23), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid, and edges with two equivalent Bi(12)O6 pentagonal pyramids. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(11), one Bi(2), and one Bi(4) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Si(1), one Bi(10), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Si(1), one Bi(12), and one Bi(9) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(11), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(3), and one Bi(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Bi(13), one Bi(6), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Bi(13), one Bi(6), and one Sb(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Si(2), one Bi(12), and one Bi(9) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Bi(7), one Bi(8), one Bi(9), and one Sb(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Si(1), one Bi(2), and one Bi(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Bi(11) and one Bi(7) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Bi(13), one Bi(6), and one Sb(2) atom. In the fourteenth O site, O(14) is bonded to one Bi(2), one Bi(8), one Bi(9), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OBi3Sb tetrahedra. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Si(2), one Bi(11), one Bi(2), and one Bi(7) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Si(2), one Bi(5), and one Bi(7) atom. In the seventeenth O site, O(17) is bonded to one Bi(12), one Bi(5), one Bi(8), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OBi3Sb tetrahedra. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Bi(10), one Bi(12), one Bi(8), and one Sb(2) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Bi(13), one Bi(6), and one Sb(1) atom. In the twentieth O site, O(20) is bonded in a water-like geometry to one Bi(9) and one Sb(1) atom. In the twenty-first O site, O(21) is bonded in a water-like geometry to one Bi(12) and one Sb(2) atom. In the twenty-second O site, O(22) is bonded in a distorted single-bond geometry to one Si(1), one Bi(10), one Bi(3), and one Bi(5) atom. In the twenty-third O site, O(23) is bonded to one Bi(12), one Bi(13), one Bi(3), and one Sb(2) atom to form distorted edge-sharing OBi3Sb trigonal pyramids. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Bi(13), one Bi(3), and one Bi(4) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Si(2), one Bi(10), and one Bi(5) atom. In the twenty-sixth O site, O(26) is bonded to one Bi(11), one Bi(6), one Bi(9), and one Sb(1) atom to form distorted edge-sharing OBi3Sb trigonal pyramids. In the twenty-seventh O site, O(27) is bonded in a bent 120 degrees geometry to one Bi(10) and one Bi(3) atom. In the twenty-eighth O site, O(28) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(11), and one Bi(6) atom. is represented by the CIF file [CIF]
data_Si2Bi13(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.126
_cell_length_b   10.212
_cell_length_c   12.694
_cell_angle_alpha   86.873
_cell_angle_beta   77.304
_cell_angle_gamma   80.310
_symmetry_Int_Tables_number   1
_cell_volume   763.617
_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
  Si  Si0  1  0.285  0.329  0.992  1.0
  Si  Si1  1  0.720  0.672  0.008  1.0
  Bi  Bi2  1  0.038  0.642  0.569  1.0
  Bi  Bi3  1  0.686  0.353  0.157  1.0
  Bi  Bi4  1  0.341  0.371  0.660  1.0
  Bi  Bi5  1  0.961  0.354  0.432  1.0
  Bi  Bi6  1  0.317  0.647  0.843  1.0
  Bi  Bi7  1  0.291  0.934  0.445  1.0
  Bi  Bi8  1  0.211  0.642  0.131  1.0
  Bi  Bi9  1  0.001  1.000  1.000  1.0
  Bi  Bi10  1  0.410  0.004  0.153  1.0
  Bi  Bi11  1  0.790  0.358  0.870  1.0
  Bi  Bi12  1  0.660  0.626  0.342  1.0
  Bi  Bi13  1  0.591  0.996  0.847  1.0
  Bi  Bi14  1  0.707  0.061  0.555  1.0
  Sb  Sb15  1  0.850  0.998  0.287  1.0
  Sb  Sb16  1  0.150  1.000  0.713  1.0
  O  O17  1  0.696  0.409  0.316  1.0
  O  O18  1  0.210  0.444  0.517  1.0
  O  O19  1  0.009  0.326  0.010  1.0
  O  O20  1  0.435  0.178  0.988  1.0
  O  O21  1  0.789  0.552  0.484  1.0
  O  O22  1  0.300  0.589  0.686  1.0
  O  O23  1  0.068  0.092  0.578  1.0
  O  O24  1  0.932  0.903  0.421  1.0
  O  O25  1  0.571  0.823  0.011  1.0
  O  O26  1  0.088  0.885  0.167  1.0
  O  O27  1  0.334  0.411  0.092  1.0
  O  O28  1  0.040  0.580  0.276  1.0
  O  O29  1  0.393  0.893  0.608  1.0
  O  O30  1  0.745  0.110  0.159  1.0
  O  O31  1  0.637  0.591  0.125  1.0
  O  O32  1  0.996  0.674  0.990  1.0
  O  O33  1  0.255  0.890  0.842  1.0
  O  O34  1  0.913  0.115  0.833  1.0
  O  O35  1  0.606  0.104  0.393  1.0
  O  O36  1  0.110  0.100  0.279  1.0
  O  O37  1  0.891  0.897  0.723  1.0
  O  O38  1  0.367  0.409  0.875  1.0
  O  O39  1  0.388  0.113  0.730  1.0
  O  O40  1  0.694  0.281  0.548  1.0
  O  O41  1  0.672  0.590  0.908  1.0
  O  O42  1  0.613  0.886  0.268  1.0
  O  O43  1  0.959  0.416  0.723  1.0
  O  O44  1  0.304  0.715  0.453  1.0
[/CIF]
.
The structure described by Si2Bi13(SbO14)2 crystallizes in the triclinic P1 space group. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(22), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, corners with two equivalent Bi(10)O5 trigonal bipyramids, and corners with two equivalent Bi(2)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(15), one O(16), one O(25), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(2)O5 trigonal bipyramid, corners with two equivalent Bi(5)O5 trigonal bipyramids, and corners with two equivalent Bi(7)O5 trigonal bipyramids. There are thirteen inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(28), one O(5), and one O(6) atom. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(14), one O(15), and one O(3) atom to form BiO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Bi(10)O5 trigonal bipyramid, and  an edgeedge with one Bi(7)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 58°. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(2), one O(22), one O(23), one O(24), one O(27), and one O(6) atom. In the fourth Bi site, Bi(4) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(24), and one O(5) atom. In the fifth Bi site, Bi(5) is bonded to one O(16), one O(17), one O(22), one O(25), and one O(6) atom to form BiO5 trigonal bipyramids that share  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Bi(7)O5 trigonal bipyramid, and  an edgeedge with one Bi(10)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 59°. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(26), one O(28), one O(7), and one O(8) atom. In the seventh Bi site, Bi(7) is bonded to one O(10), one O(11), one O(12), one O(15), and one O(16) atom to form distorted BiO5 trigonal bipyramids that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Bi(9)O6 pentagonal pyramid,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Bi(5)O5 trigonal bipyramid, and  an edgeedge with one Bi(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 45°. In the eighth Bi site, Bi(8) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(14), one O(17), and one O(18) atom. In the ninth Bi site, Bi(9) is bonded to one O(10), one O(14), one O(20), one O(26), one O(4), and one O(9) atom to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Bi(2)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, edges with two equivalent Sb(1)O6 octahedra, and  an edgeedge with one Bi(12)O6 pentagonal pyramid. In the tenth Bi site, Bi(10) is bonded to one O(18), one O(22), one O(25), one O(27), and one O(3) atom to form distorted BiO5 trigonal bipyramids that share  a cornercorner with one Sb(2)O6 octahedra,  a cornercorner with one Bi(12)O6 pentagonal pyramid,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Bi(2)O5 trigonal bipyramid, and  an edgeedge with one Bi(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 44°. In the eleventh Bi site, Bi(11) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(15), one O(26), one O(28), and one O(5) atom. In the twelfth Bi site, Bi(12) is bonded to one O(17), one O(18), one O(21), one O(23), one O(4), and one O(9) atom to form distorted BiO6 pentagonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid, edges with two equivalent Sb(2)O6 octahedra, and  an edgeedge with one Bi(9)O6 pentagonal pyramid. In the thirteenth Bi site, Bi(13) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(23), one O(24), one O(7), and one O(8) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(14), one O(19), one O(20), one O(26), and one O(8) atom to form SbO6 octahedra that share  a cornercorner with one Bi(2)O5 trigonal bipyramid,  a cornercorner with one Bi(7)O5 trigonal bipyramid, and edges with two equivalent Bi(9)O6 pentagonal pyramids. In the second Sb site, Sb(2) is bonded to one O(13), one O(17), one O(18), one O(21), one O(23), and one O(7) atom to form SbO6 octahedra that share  a cornercorner with one Bi(10)O5 trigonal bipyramid,  a cornercorner with one Bi(5)O5 trigonal bipyramid, and edges with two equivalent Bi(12)O6 pentagonal pyramids. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(11), one Bi(2), and one Bi(4) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Si(1), one Bi(10), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Si(1), one Bi(12), and one Bi(9) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(11), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(3), and one Bi(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Bi(13), one Bi(6), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Bi(13), one Bi(6), and one Sb(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Si(2), one Bi(12), and one Bi(9) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Bi(7), one Bi(8), one Bi(9), and one Sb(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Si(1), one Bi(2), and one Bi(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Bi(11) and one Bi(7) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Bi(13), one Bi(6), and one Sb(2) atom. In the fourteenth O site, O(14) is bonded to one Bi(2), one Bi(8), one Bi(9), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OBi3Sb tetrahedra. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Si(2), one Bi(11), one Bi(2), and one Bi(7) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Si(2), one Bi(5), and one Bi(7) atom. In the seventeenth O site, O(17) is bonded to one Bi(12), one Bi(5), one Bi(8), and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OBi3Sb tetrahedra. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Bi(10), one Bi(12), one Bi(8), and one Sb(2) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Bi(13), one Bi(6), and one Sb(1) atom. In the twentieth O site, O(20) is bonded in a water-like geometry to one Bi(9) and one Sb(1) atom. In the twenty-first O site, O(21) is bonded in a water-like geometry to one Bi(12) and one Sb(2) atom. In the twenty-second O site, O(22) is bonded in a distorted single-bond geometry to one Si(1), one Bi(10), one Bi(3), and one Bi(5) atom. In the twenty-third O site, O(23) is bonded to one Bi(12), one Bi(13), one Bi(3), and one Sb(2) atom to form distorted edge-sharing OBi3Sb trigonal pyramids. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Bi(13), one Bi(3), and one Bi(4) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Si(2), one Bi(10), and one Bi(5) atom. In the twenty-sixth O site, O(26) is bonded to one Bi(11), one Bi(6), one Bi(9), and one Sb(1) atom to form distorted edge-sharing OBi3Sb trigonal pyramids. In the twenty-seventh O site, O(27) is bonded in a bent 120 degrees geometry to one Bi(10) and one Bi(3) atom. In the twenty-eighth O site, O(28) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(11), and one Bi(6) atom. is represented by the CIF file [CIF]
data_Si2Bi13(SbO14)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.126
_cell_length_b   10.212
_cell_length_c   12.694
_cell_angle_alpha   86.873
_cell_angle_beta   77.304
_cell_angle_gamma   80.310
_symmetry_Int_Tables_number   1
_cell_volume   763.617
_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
  Si  Si0  1  0.285  0.329  0.992  1.0
  Si  Si1  1  0.720  0.672  0.008  1.0
  Bi  Bi2  1  0.038  0.642  0.569  1.0
  Bi  Bi3  1  0.686  0.353  0.157  1.0
  Bi  Bi4  1  0.341  0.371  0.660  1.0
  Bi  Bi5  1  0.961  0.354  0.432  1.0
  Bi  Bi6  1  0.317  0.647  0.843  1.0
  Bi  Bi7  1  0.291  0.934  0.445  1.0
  Bi  Bi8  1  0.211  0.642  0.131  1.0
  Bi  Bi9  1  0.001  1.000  1.000  1.0
  Bi  Bi10  1  0.410  0.004  0.153  1.0
  Bi  Bi11  1  0.790  0.358  0.870  1.0
  Bi  Bi12  1  0.660  0.626  0.342  1.0
  Bi  Bi13  1  0.591  0.996  0.847  1.0
  Bi  Bi14  1  0.707  0.061  0.555  1.0
  Sb  Sb15  1  0.850  0.998  0.287  1.0
  Sb  Sb16  1  0.150  1.000  0.713  1.0
  O  O17  1  0.696  0.409  0.316  1.0
  O  O18  1  0.210  0.444  0.517  1.0
  O  O19  1  0.009  0.326  0.010  1.0
  O  O20  1  0.435  0.178  0.988  1.0
  O  O21  1  0.789  0.552  0.484  1.0
  O  O22  1  0.300  0.589  0.686  1.0
  O  O23  1  0.068  0.092  0.578  1.0
  O  O24  1  0.932  0.903  0.421  1.0
  O  O25  1  0.571  0.823  0.011  1.0
  O  O26  1  0.088  0.885  0.167  1.0
  O  O27  1  0.334  0.411  0.092  1.0
  O  O28  1  0.040  0.580  0.276  1.0
  O  O29  1  0.393  0.893  0.608  1.0
  O  O30  1  0.745  0.110  0.159  1.0
  O  O31  1  0.637  0.591  0.125  1.0
  O  O32  1  0.996  0.674  0.990  1.0
  O  O33  1  0.255  0.890  0.842  1.0
  O  O34  1  0.913  0.115  0.833  1.0
  O  O35  1  0.606  0.104  0.393  1.0
  O  O36  1  0.110  0.100  0.279  1.0
  O  O37  1  0.891  0.897  0.723  1.0
  O  O38  1  0.367  0.409  0.875  1.0
  O  O39  1  0.388  0.113  0.730  1.0
  O  O40  1  0.694  0.281  0.548  1.0
  O  O41  1  0.672  0.590  0.908  1.0
  O  O42  1  0.613  0.886  0.268  1.0
  O  O43  1  0.959  0.416  0.723  1.0
  O  O44  1  0.304  0.715  0.453  1.0
[/CIF]
.