The compound described by Li9Fe4(PO5)4 crystallizes in the triclinic P1 space group. There are nine inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(15), one O(4), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(10), one O(16), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one P(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, and corners with two equivalent P(4)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(17), one O(5), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(16), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(13), one O(17), one O(20), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(14), one O(18), one O(19), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(16), one O(18), one O(19), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(15), one O(17), one O(20), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(4)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 P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(1), one O(14), one O(2), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(3), one O(4), 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(4)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(10), one O(12), one O(3), and one O(4) 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 Fe(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(1), one O(13), one O(14), and one O(19) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(13), one O(14), one O(2), and one O(20) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(19), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(20), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. In the third P site, P(3) is bonded to one O(11), one O(15), one O(17), and one O(9) atom to form PO4 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(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Fe(1)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(16), and one O(18) atom to form PO4 tetrahedra that share  a cornercorner with one Li(6)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, and corners with two equivalent Fe(2)O4 tetrahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(9), one Fe(3), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(9), one Fe(4), and one P(2) atom. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Fe(1), and one Fe(2) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Li(1), one Fe(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(3), one Li(5), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(6), one Li(9), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Li(7), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Li(8), and one P(2) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(3), one Fe(1), and one P(3) atom to form OLi2FeP tetrahedra that share  a cornercorner with one O(3)Li2Fe2 tetrahedra and corners with two equivalent O(17)Li3P tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(2), one Fe(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Li(4), one Fe(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(4), one Fe(2), and one P(4) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(5), one Fe(3), and one Fe(4) atom. In the fourteenth O site, O(14) is bonded to one Li(6), one Li(9), one Fe(3), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(8), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Li(4), one Li(7), and one P(4) atom. In the seventeenth O site, O(17) is bonded to one Li(3), one Li(5), one Li(8), and one P(3) atom to form corner-sharing OLi3P tetrahedra. In the eighteenth O site, O(18) is bonded in a trigonal planar geometry to one Li(6), one Li(7), and one P(4) atom. In the nineteenth O site, O(19) is bonded to one Li(6), one Li(7), one Fe(3), and one P(1) atom to form corner-sharing OLi2FeP tetrahedra. In the twentieth O site, O(20) is bonded to one Li(5), one Li(8), one Fe(4), and one P(2) atom to form distorted OLi2FeP tetrahedra that share  a cornercorner with one O(14)Li2Fe2 tetrahedra and corners with two equivalent O(17)Li3P tetrahedra. is represented by the CIF card [CIF]
data_Li9Fe4(PO5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.913
_cell_length_b   5.640
_cell_length_c   15.975
_cell_angle_alpha   89.646
_cell_angle_beta   89.960
_cell_angle_gamma   89.746
_symmetry_Int_Tables_number   1
_cell_volume   442.681
_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  0.996  0.646  0.596  1.0
  Li  Li1  1  0.007  0.153  0.901  1.0
  Li  Li2  1  0.002  0.171  0.501  1.0
  Li  Li3  1  0.504  0.321  0.799  1.0
  Li  Li4  1  0.503  0.332  0.411  1.0
  Li  Li5  1  0.497  0.838  0.093  1.0
  Li  Li6  1  0.503  0.342  0.988  1.0
  Li  Li7  1  0.495  0.839  0.511  1.0
  Li  Li8  1  0.000  0.682  0.196  1.0
  Fe  Fe9  1  0.022  0.150  0.702  1.0
  Fe  Fe10  1  0.009  0.661  0.796  1.0
  Fe  Fe11  1  0.508  0.340  0.201  1.0
  Fe  Fe12  1  0.505  0.840  0.301  1.0
  P  P13  1  0.020  0.176  0.099  1.0
  P  P14  1  0.010  0.665  0.404  1.0
  P  P15  1  0.506  0.333  0.594  1.0
  P  P16  1  0.498  0.827  0.904  1.0
  O  O17  1  0.127  0.357  0.168  1.0
  O  O18  1  0.125  0.761  0.317  1.0
  O  O19  1  0.105  0.342  0.803  1.0
  O  O20  1  0.052  0.808  0.695  1.0
  O  O21  1  0.097  0.409  0.415  1.0
  O  O22  1  0.120  0.929  0.125  1.0
  O  O23  1  0.111  0.259  0.014  1.0
  O  O24  1  0.100  0.829  0.475  1.0
  O  O25  1  0.185  0.326  0.596  1.0
  O  O26  1  0.185  0.842  0.885  1.0
  O  O27  1  0.610  0.241  0.681  1.0
  O  O28  1  0.625  0.671  0.833  1.0
  O  O29  1  0.553  0.167  0.299  1.0
  O  O30  1  0.601  0.666  0.204  1.0
  O  O31  1  0.609  0.583  0.575  1.0
  O  O32  1  0.609  0.085  0.902  1.0
  O  O33  1  0.600  0.168  0.521  1.0
  O  O34  1  0.547  0.698  0.988  1.0
  O  O35  1  0.695  0.189  0.107  1.0
  O  O36  1  0.687  0.683  0.394  1.0
[/CIF]
.
The compound described by Li9Fe4(PO5)4 crystallizes in the triclinic P1 space group. There are nine inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(15), one O(4), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(10), one O(16), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra,  a cornercorner with one P(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, and corners with two equivalent P(4)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(17), one O(5), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(11), one O(12), one O(16), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(13), one O(17), one O(20), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(14), one O(18), one O(19), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(16), one O(18), one O(19), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(15), one O(17), one O(20), and one O(8) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Fe(4)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 P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(1), one O(14), one O(2), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(3), one O(4), 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(4)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(10), one O(12), one O(3), and one O(4) 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 Fe(1)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(1), one O(13), one O(14), and one O(19) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(13), one O(14), one O(2), and one O(20) atom to form FeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(19), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, and corners with two equivalent Fe(3)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(20), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Fe(4)O4 tetrahedra. In the third P site, P(3) is bonded to one O(11), one O(15), one O(17), and one O(9) atom to form PO4 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(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Fe(1)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(16), and one O(18) atom to form PO4 tetrahedra that share  a cornercorner with one Li(6)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, and corners with two equivalent Fe(2)O4 tetrahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(9), one Fe(3), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(9), one Fe(4), and one P(2) atom. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Fe(1), and one Fe(2) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Li(1), one Fe(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(3), one Li(5), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(6), one Li(9), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Li(7), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(3), one Li(8), and one P(2) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(3), one Fe(1), and one P(3) atom to form OLi2FeP tetrahedra that share  a cornercorner with one O(3)Li2Fe2 tetrahedra and corners with two equivalent O(17)Li3P tetrahedra. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Li(2), one Fe(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Li(4), one Fe(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(4), one Fe(2), and one P(4) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Li(5), one Fe(3), and one Fe(4) atom. In the fourteenth O site, O(14) is bonded to one Li(6), one Li(9), one Fe(3), and one Fe(4) atom to form corner-sharing OLi2Fe2 tetrahedra. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(8), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Li(2), one Li(4), one Li(7), and one P(4) atom. In the seventeenth O site, O(17) is bonded to one Li(3), one Li(5), one Li(8), and one P(3) atom to form corner-sharing OLi3P tetrahedra. In the eighteenth O site, O(18) is bonded in a trigonal planar geometry to one Li(6), one Li(7), and one P(4) atom. In the nineteenth O site, O(19) is bonded to one Li(6), one Li(7), one Fe(3), and one P(1) atom to form corner-sharing OLi2FeP tetrahedra. In the twentieth O site, O(20) is bonded to one Li(5), one Li(8), one Fe(4), and one P(2) atom to form distorted OLi2FeP tetrahedra that share  a cornercorner with one O(14)Li2Fe2 tetrahedra and corners with two equivalent O(17)Li3P tetrahedra. is represented by the CIF card [CIF]
data_Li9Fe4(PO5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.913
_cell_length_b   5.640
_cell_length_c   15.975
_cell_angle_alpha   89.646
_cell_angle_beta   89.960
_cell_angle_gamma   89.746
_symmetry_Int_Tables_number   1
_cell_volume   442.681
_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  0.996  0.646  0.596  1.0
  Li  Li1  1  0.007  0.153  0.901  1.0
  Li  Li2  1  0.002  0.171  0.501  1.0
  Li  Li3  1  0.504  0.321  0.799  1.0
  Li  Li4  1  0.503  0.332  0.411  1.0
  Li  Li5  1  0.497  0.838  0.093  1.0
  Li  Li6  1  0.503  0.342  0.988  1.0
  Li  Li7  1  0.495  0.839  0.511  1.0
  Li  Li8  1  0.000  0.682  0.196  1.0
  Fe  Fe9  1  0.022  0.150  0.702  1.0
  Fe  Fe10  1  0.009  0.661  0.796  1.0
  Fe  Fe11  1  0.508  0.340  0.201  1.0
  Fe  Fe12  1  0.505  0.840  0.301  1.0
  P  P13  1  0.020  0.176  0.099  1.0
  P  P14  1  0.010  0.665  0.404  1.0
  P  P15  1  0.506  0.333  0.594  1.0
  P  P16  1  0.498  0.827  0.904  1.0
  O  O17  1  0.127  0.357  0.168  1.0
  O  O18  1  0.125  0.761  0.317  1.0
  O  O19  1  0.105  0.342  0.803  1.0
  O  O20  1  0.052  0.808  0.695  1.0
  O  O21  1  0.097  0.409  0.415  1.0
  O  O22  1  0.120  0.929  0.125  1.0
  O  O23  1  0.111  0.259  0.014  1.0
  O  O24  1  0.100  0.829  0.475  1.0
  O  O25  1  0.185  0.326  0.596  1.0
  O  O26  1  0.185  0.842  0.885  1.0
  O  O27  1  0.610  0.241  0.681  1.0
  O  O28  1  0.625  0.671  0.833  1.0
  O  O29  1  0.553  0.167  0.299  1.0
  O  O30  1  0.601  0.666  0.204  1.0
  O  O31  1  0.609  0.583  0.575  1.0
  O  O32  1  0.609  0.085  0.902  1.0
  O  O33  1  0.600  0.168  0.521  1.0
  O  O34  1  0.547  0.698  0.988  1.0
  O  O35  1  0.695  0.189  0.107  1.0
  O  O36  1  0.687  0.683  0.394  1.0
[/CIF]
.