The material structure described by Li7Fe7SiO16 crystallizes in the triclinic P1 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(14), one O(16), one O(4), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(11), one O(2), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(12), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(15), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(6)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(12), one O(16), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(1), one O(10), one O(13), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(6)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(14), one O(2), one O(4), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(6)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. There are seven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(13), one O(16), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(12), one O(4), one O(8), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(14), one O(5), one O(8), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. In the fifth Fe site, Fe(5) is bonded to one O(10), one O(13), one O(6), and one O(7) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the sixth Fe site, Fe(6) is bonded to one O(11), one O(15), one O(2), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the seventh Fe site, Fe(7) is bonded to one O(1), one O(12), one O(16), and one O(4) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. Si(1) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), one Li(6), one Fe(1), and one Fe(7) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(12)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, corners with two equivalent O(6)Li2Fe2 tetrahedra, and corners with two equivalent O(10)Li2FeSi tetrahedra. In the second O site, O(2) is bonded to one Li(2), one Li(7), one Fe(2), and one Fe(6) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(5)Li2Fe2 tetrahedra, corners with two equivalent O(9)Li2Fe2 tetrahedra, and corners with two equivalent O(11)Li2FeSi tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(6), one Fe(6), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(7), one Fe(3), and one Fe(7) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Fe(2), and one Fe(4) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(8)Li2Fe2 tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(9)Li2Fe2 tetrahedra, and corners with two equivalent O(11)Li2FeSi tetrahedra. In the sixth O site, O(6) is bonded to one Li(3), one Li(5), one Fe(1), and one Fe(5) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(8)Li2Fe2 tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, corners with two equivalent O(12)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, and corners with two equivalent O(10)Li2FeSi tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(4), one Fe(5), and one Si(1) atom. In the eighth O site, O(8) is bonded to one Li(1), one Li(5), one Fe(3), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the ninth O site, O(9) is bonded to one Li(2), one Li(7), one Fe(3), and one Fe(4) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(12)Li2Fe2 tetrahedra,  a cornercorner with one O(11)Li2FeSi tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, corners with two equivalent O(5)Li2Fe2 tetrahedra, and corners with two equivalent O(8)Li2Fe2 tetrahedra. In the tenth O site, O(10) is bonded to one Li(3), one Li(6), one Fe(5), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(12)Li2Fe2 tetrahedra,  a cornercorner with one O(11)Li2FeSi tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, and corners with two equivalent O(6)Li2Fe2 tetrahedra. In the eleventh O site, O(11) is bonded to one Li(2), one Li(4), one Fe(6), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(9)Li2Fe2 tetrahedra,  a cornercorner with one O(10)Li2FeSi tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, and corners with two equivalent O(5)Li2Fe2 tetrahedra. In the twelfth O site, O(12) is bonded to one Li(3), one Li(5), one Fe(3), and one Fe(7) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(9)Li2Fe2 tetrahedra,  a cornercorner with one O(10)Li2FeSi tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, corners with two equivalent O(6)Li2Fe2 tetrahedra, and corners with two equivalent O(8)Li2Fe2 tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal non-coplanar geometry to one Li(6), one Fe(1), and one Fe(5) atom. In the fourteenth O site, O(14) is bonded to one Li(1), one Li(7), one Fe(2), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one Li(4), one Fe(2), and one Fe(6) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(5), one Fe(1), and one Fe(7) atom to form corner-sharing OLi2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_Li7Fe7SiO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.112
_cell_length_b   5.558
_cell_length_c   13.084
_cell_angle_alpha   89.920
_cell_angle_beta   89.927
_cell_angle_gamma   89.875
_symmetry_Int_Tables_number   1
_cell_volume   371.739
_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
  Li  Li0  1  0.008  0.918  0.812  1.0
  Li  Li1  1  0.506  0.585  0.560  1.0
  Li  Li2  1  0.505  0.584  0.064  1.0
  Li  Li3  1  0.014  0.424  0.436  1.0
  Li  Li4  1  0.009  0.419  0.939  1.0
  Li  Li5  1  0.500  0.066  0.192  1.0
  Li  Li6  1  0.507  0.082  0.687  1.0
  Fe  Fe7  1  0.003  0.921  0.062  1.0
  Fe  Fe8  1  0.006  0.920  0.563  1.0
  Fe  Fe9  1  0.506  0.583  0.813  1.0
  Fe  Fe10  1  0.007  0.416  0.687  1.0
  Fe  Fe11  1  0.010  0.421  0.190  1.0
  Fe  Fe12  1  0.501  0.077  0.431  1.0
  Fe  Fe13  1  0.503  0.084  0.937  1.0
  Si  Si14  1  0.502  0.574  0.314  1.0
  O  O15  1  0.626  0.930  0.059  1.0
  O  O16  1  0.629  0.933  0.554  1.0
  O  O17  1  0.574  0.862  0.319  1.0
  O  O18  1  0.614  0.912  0.817  1.0
  O  O19  1  0.114  0.589  0.566  1.0
  O  O20  1  0.110  0.591  0.070  1.0
  O  O21  1  0.182  0.537  0.309  1.0
  O  O22  1  0.130  0.572  0.808  1.0
  O  O23  1  0.630  0.430  0.691  1.0
  O  O24  1  0.630  0.448  0.209  1.0
  O  O25  1  0.612  0.419  0.415  1.0
  O  O26  1  0.612  0.413  0.934  1.0
  O  O27  1  0.122  0.105  0.173  1.0
  O  O28  1  0.112  0.087  0.685  1.0
  O  O29  1  0.138  0.094  0.451  1.0
  O  O30  1  0.128  0.072  0.940  1.0
[/CIF]
.
The material structure described by Li7Fe7SiO16 crystallizes in the triclinic P1 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(14), one O(16), one O(4), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(11), one O(2), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(12), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(15), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(6)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(12), one O(16), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one Fe(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(1), one O(10), one O(13), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(6)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(14), one O(2), one O(4), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(6)O4 tetrahedra,  a cornercorner with one Fe(7)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. There are seven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(13), one O(16), and one O(6) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(12), one O(4), one O(8), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent Fe(7)O4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(14), one O(5), one O(8), and one O(9) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. In the fifth Fe site, Fe(5) is bonded to one O(10), one O(13), one O(6), and one O(7) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the sixth Fe site, Fe(6) is bonded to one O(11), one O(15), one O(2), and one O(3) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the seventh Fe site, Fe(7) is bonded to one O(1), one O(12), one O(16), and one O(4) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. Si(1) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(5)O4 tetrahedra, and corners with two equivalent Fe(6)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), one Li(6), one Fe(1), and one Fe(7) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(12)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, corners with two equivalent O(6)Li2Fe2 tetrahedra, and corners with two equivalent O(10)Li2FeSi tetrahedra. In the second O site, O(2) is bonded to one Li(2), one Li(7), one Fe(2), and one Fe(6) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(5)Li2Fe2 tetrahedra, corners with two equivalent O(9)Li2Fe2 tetrahedra, and corners with two equivalent O(11)Li2FeSi tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(6), one Fe(6), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(7), one Fe(3), and one Fe(7) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Fe(2), and one Fe(4) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(8)Li2Fe2 tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(9)Li2Fe2 tetrahedra, and corners with two equivalent O(11)Li2FeSi tetrahedra. In the sixth O site, O(6) is bonded to one Li(3), one Li(5), one Fe(1), and one Fe(5) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(8)Li2Fe2 tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, corners with two equivalent O(12)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, and corners with two equivalent O(10)Li2FeSi tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(4), one Fe(5), and one Si(1) atom. In the eighth O site, O(8) is bonded to one Li(1), one Li(5), one Fe(3), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the ninth O site, O(9) is bonded to one Li(2), one Li(7), one Fe(3), and one Fe(4) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(12)Li2Fe2 tetrahedra,  a cornercorner with one O(11)Li2FeSi tetrahedra, corners with two equivalent O(14)Li2Fe2 tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, corners with two equivalent O(5)Li2Fe2 tetrahedra, and corners with two equivalent O(8)Li2Fe2 tetrahedra. In the tenth O site, O(10) is bonded to one Li(3), one Li(6), one Fe(5), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(12)Li2Fe2 tetrahedra,  a cornercorner with one O(11)Li2FeSi tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, and corners with two equivalent O(6)Li2Fe2 tetrahedra. In the eleventh O site, O(11) is bonded to one Li(2), one Li(4), one Fe(6), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(9)Li2Fe2 tetrahedra,  a cornercorner with one O(10)Li2FeSi tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, and corners with two equivalent O(5)Li2Fe2 tetrahedra. In the twelfth O site, O(12) is bonded to one Li(3), one Li(5), one Fe(3), and one Fe(7) atom to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(9)Li2Fe2 tetrahedra,  a cornercorner with one O(10)Li2FeSi tetrahedra, corners with two equivalent O(1)Li2Fe2 tetrahedra, corners with two equivalent O(16)Li2Fe2 tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, corners with two equivalent O(6)Li2Fe2 tetrahedra, and corners with two equivalent O(8)Li2Fe2 tetrahedra. In the thirteenth O site, O(13) is bonded in a trigonal non-coplanar geometry to one Li(6), one Fe(1), and one Fe(5) atom. In the fourteenth O site, O(14) is bonded to one Li(1), one Li(7), one Fe(2), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one Li(4), one Fe(2), and one Fe(6) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(5), one Fe(1), and one Fe(7) atom to form corner-sharing OLi2Fe2 tetrahedra. is represented by the CIF file [CIF]
data_Li7Fe7SiO16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.112
_cell_length_b   5.558
_cell_length_c   13.084
_cell_angle_alpha   89.920
_cell_angle_beta   89.927
_cell_angle_gamma   89.875
_symmetry_Int_Tables_number   1
_cell_volume   371.739
_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
  Li  Li0  1  0.008  0.918  0.812  1.0
  Li  Li1  1  0.506  0.585  0.560  1.0
  Li  Li2  1  0.505  0.584  0.064  1.0
  Li  Li3  1  0.014  0.424  0.436  1.0
  Li  Li4  1  0.009  0.419  0.939  1.0
  Li  Li5  1  0.500  0.066  0.192  1.0
  Li  Li6  1  0.507  0.082  0.687  1.0
  Fe  Fe7  1  0.003  0.921  0.062  1.0
  Fe  Fe8  1  0.006  0.920  0.563  1.0
  Fe  Fe9  1  0.506  0.583  0.813  1.0
  Fe  Fe10  1  0.007  0.416  0.687  1.0
  Fe  Fe11  1  0.010  0.421  0.190  1.0
  Fe  Fe12  1  0.501  0.077  0.431  1.0
  Fe  Fe13  1  0.503  0.084  0.937  1.0
  Si  Si14  1  0.502  0.574  0.314  1.0
  O  O15  1  0.626  0.930  0.059  1.0
  O  O16  1  0.629  0.933  0.554  1.0
  O  O17  1  0.574  0.862  0.319  1.0
  O  O18  1  0.614  0.912  0.817  1.0
  O  O19  1  0.114  0.589  0.566  1.0
  O  O20  1  0.110  0.591  0.070  1.0
  O  O21  1  0.182  0.537  0.309  1.0
  O  O22  1  0.130  0.572  0.808  1.0
  O  O23  1  0.630  0.430  0.691  1.0
  O  O24  1  0.630  0.448  0.209  1.0
  O  O25  1  0.612  0.419  0.415  1.0
  O  O26  1  0.612  0.413  0.934  1.0
  O  O27  1  0.122  0.105  0.173  1.0
  O  O28  1  0.112  0.087  0.685  1.0
  O  O29  1  0.138  0.094  0.451  1.0
  O  O30  1  0.128  0.072  0.940  1.0
[/CIF]
.