The structure described by Li3Fe2(SiO4)2 is Clathrate-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(15), one O(3), and one O(4) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra,  an edgeedge with one Fe(1)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(7), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(5)O4 tetrahedra,  an edgeedge with one Fe(3)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(10), one O(11), one O(13), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the sixth Li site, Li(6) is bonded to one O(12), one O(14), one O(15), and one O(16) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(14), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the fourth Fe site, Fe(4) is bonded to one O(11), one O(13), one O(15), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(16), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the third Si site, Si(3) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Li(4)O4 trigonal pyramids. In the fourth Si site, Si(4) is bonded to one O(1), one O(13), one O(14), and one O(15) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Fe(1), and one Si(4) atom to form edge-sharing OLi2FeSi trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Fe(2), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2FeSi tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Fe(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Li(2), one Fe(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Li(3), one Fe(1), and one Si(2) atom. In the seventh O site, O(7) is bonded to one Li(3), one Li(4), one Fe(2), and one Si(2) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(3), one Fe(2), and one Si(3) atom. In the ninth O site, O(9) is bonded to one Li(4), one Li(5), one Fe(3), and one Si(2) atom to form edge-sharing OLi2FeSi trigonal pyramids. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(5), one Fe(3), and one Si(3) atom. In the eleventh O site, O(11) is bonded to one Li(4), one Li(5), one Fe(4), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Fe(3), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(5), one Fe(4), and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a trigonal non-coplanar geometry to one Li(6), one Fe(3), and one Si(4) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Li(6), one Fe(4), and one Si(4) atom to form a mixture of corner and edge-sharing OLi2FeSi trigonal pyramids. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Li(6), one Fe(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li3Fe2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.170
_cell_length_b   6.615
_cell_length_c   10.566
_cell_angle_alpha   89.921
_cell_angle_beta   89.446
_cell_angle_gamma   90.225
_symmetry_Int_Tables_number   1
_cell_volume   361.337
_cell_formula_units_Z   2
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
  Li  Li0  1  0.635  0.247  0.912  1.0
  Li  Li1  1  0.235  0.997  0.839  1.0
  Li  Li2  1  0.756  0.497  0.660  1.0
  Li  Li3  1  0.641  0.255  0.421  1.0
  Li  Li4  1  0.234  0.502  0.345  1.0
  Li  Li5  1  0.758  1.000  0.157  1.0
  Fe  Fe6  1  0.234  0.520  0.821  1.0
  Fe  Fe7  1  0.746  0.990  0.668  1.0
  Fe  Fe8  1  0.246  0.991  0.332  1.0
  Fe  Fe9  1  0.756  0.514  0.163  1.0
  Si  Si10  1  0.748  0.749  0.911  1.0
  Si  Si11  1  0.254  0.241  0.592  1.0
  Si  Si12  1  0.745  0.748  0.413  1.0
  Si  Si13  1  0.252  0.259  0.091  1.0
  O  O14  1  0.206  0.257  0.940  1.0
  O  O15  1  0.059  0.758  0.887  1.0
  O  O16  1  0.620  0.957  0.853  1.0
  O  O17  1  0.636  0.537  0.848  1.0
  O  O18  1  0.132  0.045  0.662  1.0
  O  O19  1  0.131  0.449  0.647  1.0
  O  O20  1  0.575  0.245  0.602  1.0
  O  O21  1  0.688  0.738  0.561  1.0
  O  O22  1  0.207  0.231  0.432  1.0
  O  O23  1  0.056  0.758  0.374  1.0
  O  O24  1  0.633  0.542  0.338  1.0
  O  O25  1  0.618  0.954  0.343  1.0
  O  O26  1  0.113  0.449  0.167  1.0
  O  O27  1  0.143  0.055  0.166  1.0
  O  O28  1  0.574  0.271  0.114  1.0
  O  O29  1  0.689  0.745  0.068  1.0
[/CIF]
.
The structure described by Li3Fe2(SiO4)2 is Clathrate-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(15), one O(3), and one O(4) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra,  an edgeedge with one Fe(1)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(7), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(5)O4 tetrahedra,  an edgeedge with one Fe(3)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(10), one O(11), one O(13), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the sixth Li site, Li(6) is bonded to one O(12), one O(14), one O(15), and one O(16) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. In the third Fe site, Fe(3) is bonded to one O(10), one O(12), one O(14), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the fourth Fe site, Fe(4) is bonded to one O(11), one O(13), one O(15), and one O(16) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  a cornercorner with one Li(4)O4 trigonal pyramid. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(16), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and  an edgeedge with one Li(4)O4 trigonal pyramid. In the third Si site, Si(3) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Li(4)O4 trigonal pyramids. In the fourth Si site, Si(4) is bonded to one O(1), one O(13), one O(14), and one O(15) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Fe(1), and one Si(4) atom to form edge-sharing OLi2FeSi trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Fe(2), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2FeSi tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Fe(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Li(2), one Fe(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Li(3), one Fe(1), and one Si(2) atom. In the seventh O site, O(7) is bonded to one Li(3), one Li(4), one Fe(2), and one Si(2) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(3), one Fe(2), and one Si(3) atom. In the ninth O site, O(9) is bonded to one Li(4), one Li(5), one Fe(3), and one Si(2) atom to form edge-sharing OLi2FeSi trigonal pyramids. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(5), one Fe(3), and one Si(3) atom. In the eleventh O site, O(11) is bonded to one Li(4), one Li(5), one Fe(4), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Fe(3), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2FeSi tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(5), one Fe(4), and one Si(4) atom. In the fourteenth O site, O(14) is bonded in a trigonal non-coplanar geometry to one Li(6), one Fe(3), and one Si(4) atom. In the fifteenth O site, O(15) is bonded to one Li(1), one Li(6), one Fe(4), and one Si(4) atom to form a mixture of corner and edge-sharing OLi2FeSi trigonal pyramids. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Li(6), one Fe(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li3Fe2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.170
_cell_length_b   6.615
_cell_length_c   10.566
_cell_angle_alpha   89.921
_cell_angle_beta   89.446
_cell_angle_gamma   90.225
_symmetry_Int_Tables_number   1
_cell_volume   361.337
_cell_formula_units_Z   2
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
  Li  Li0  1  0.635  0.247  0.912  1.0
  Li  Li1  1  0.235  0.997  0.839  1.0
  Li  Li2  1  0.756  0.497  0.660  1.0
  Li  Li3  1  0.641  0.255  0.421  1.0
  Li  Li4  1  0.234  0.502  0.345  1.0
  Li  Li5  1  0.758  1.000  0.157  1.0
  Fe  Fe6  1  0.234  0.520  0.821  1.0
  Fe  Fe7  1  0.746  0.990  0.668  1.0
  Fe  Fe8  1  0.246  0.991  0.332  1.0
  Fe  Fe9  1  0.756  0.514  0.163  1.0
  Si  Si10  1  0.748  0.749  0.911  1.0
  Si  Si11  1  0.254  0.241  0.592  1.0
  Si  Si12  1  0.745  0.748  0.413  1.0
  Si  Si13  1  0.252  0.259  0.091  1.0
  O  O14  1  0.206  0.257  0.940  1.0
  O  O15  1  0.059  0.758  0.887  1.0
  O  O16  1  0.620  0.957  0.853  1.0
  O  O17  1  0.636  0.537  0.848  1.0
  O  O18  1  0.132  0.045  0.662  1.0
  O  O19  1  0.131  0.449  0.647  1.0
  O  O20  1  0.575  0.245  0.602  1.0
  O  O21  1  0.688  0.738  0.561  1.0
  O  O22  1  0.207  0.231  0.432  1.0
  O  O23  1  0.056  0.758  0.374  1.0
  O  O24  1  0.633  0.542  0.338  1.0
  O  O25  1  0.618  0.954  0.343  1.0
  O  O26  1  0.113  0.449  0.167  1.0
  O  O27  1  0.143  0.055  0.166  1.0
  O  O28  1  0.574  0.271  0.114  1.0
  O  O29  1  0.689  0.745  0.068  1.0
[/CIF]
.