The compound described by Li3FeSiO5 is Stannite-like structured and crystallizes in the orthorhombic Pna2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and corners with four equivalent Li(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(3), one O(5), and two equivalent O(1) atoms to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and corners with four equivalent Fe(1)O4 tetrahedra. Fe(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form FeO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with four equivalent Li(3)O4 tetrahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(3)O4 tetrahedra, and corners with four equivalent Li(2)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Li(2), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Fe2 tetrahedra,  a cornercorner with one O(4)Li2FeSi tetrahedra, corners with two equivalent O(1)Li3Si tetrahedra, corners with four equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(3)Li3Si tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(3), and two equivalent Fe(1) atoms to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(1)Li3Si tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(3)Li3Si tetrahedra, corners with three equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(4)Li2FeSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Li(3), and one Si(1) atom to form OLi3Si tetrahedra that share corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with three equivalent O(4)Li2FeSi tetrahedra, corners with three equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(1)Li3Si tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Li(3), one Fe(1), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(1)Li3Si tetrahedra, corners with two equivalent O(4)Li2FeSi tetrahedra, corners with two equivalent O(5)Li2FeSi tetrahedra, corners with three equivalent O(3)Li3Si tetrahedra, and corners with four equivalent O(2)Li2Fe2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Fe(1), and one Si(1) atom to form OLi2FeSi tetrahedra that share corners with two equivalent O(4)Li2FeSi tetrahedra, corners with three equivalent O(2)Li2Fe2 tetrahedra, corners with three equivalent O(3)Li3Si tetrahedra, and corners with four equivalent O(1)Li3Si tetrahedra. is represented by the CIF file [CIF]
data_Li3FeSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.946
_cell_length_b   5.473
_cell_length_c   15.804
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   427.797
_cell_formula_units_Z   4
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  0.003  0.664  0.592  1.0
  Li  Li1  1  0.003  0.164  0.908  1.0
  Li  Li2  1  0.007  0.665  0.006  1.0
  Li  Li3  1  0.007  0.165  0.494  1.0
  Li  Li4  1  0.503  0.836  0.092  1.0
  Li  Li5  1  0.504  0.320  0.805  1.0
  Li  Li6  1  0.504  0.820  0.695  1.0
  Li  Li7  1  0.503  0.336  0.408  1.0
  Li  Li8  1  0.507  0.835  0.506  1.0
  Li  Li9  1  0.507  0.335  0.994  1.0
  Li  Li10  1  0.004  0.180  0.305  1.0
  Li  Li11  1  0.004  0.680  0.195  1.0
  Fe  Fe12  1  0.004  0.669  0.803  1.0
  Fe  Fe13  1  0.504  0.831  0.303  1.0
  Fe  Fe14  1  0.504  0.331  0.197  1.0
  Fe  Fe15  1  0.004  0.169  0.697  1.0
  Si  Si16  1  0.010  0.664  0.403  1.0
  Si  Si17  1  0.510  0.336  0.597  1.0
  Si  Si18  1  0.510  0.836  0.903  1.0
  Si  Si19  1  0.010  0.164  0.097  1.0
  O  O20  1  0.110  0.317  0.014  1.0
  O  O21  1  0.101  0.834  0.701  1.0
  O  O22  1  0.101  0.334  0.799  1.0
  O  O23  1  0.107  0.883  0.101  1.0
  O  O24  1  0.107  0.383  0.399  1.0
  O  O25  1  0.110  0.817  0.486  1.0
  O  O26  1  0.115  0.312  0.186  1.0
  O  O27  1  0.115  0.812  0.314  1.0
  O  O28  1  0.169  0.320  0.602  1.0
  O  O29  1  0.169  0.820  0.898  1.0
  O  O30  1  0.610  0.183  0.514  1.0
  O  O31  1  0.601  0.666  0.201  1.0
  O  O32  1  0.601  0.166  0.299  1.0
  O  O33  1  0.607  0.617  0.601  1.0
  O  O34  1  0.607  0.117  0.899  1.0
  O  O35  1  0.610  0.683  0.986  1.0
  O  O36  1  0.615  0.188  0.686  1.0
  O  O37  1  0.615  0.688  0.814  1.0
  O  O38  1  0.669  0.180  0.102  1.0
  O  O39  1  0.669  0.680  0.398  1.0
[/CIF]
.
The compound described by Li3FeSiO5 is Stannite-like structured and crystallizes in the orthorhombic Pna2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and corners with four equivalent Li(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(3), one O(5), and two equivalent O(1) atoms to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and corners with four equivalent Fe(1)O4 tetrahedra. Fe(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form FeO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with four equivalent Li(3)O4 tetrahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with three equivalent Li(3)O4 tetrahedra, and corners with four equivalent Li(2)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Li(2), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Fe2 tetrahedra,  a cornercorner with one O(4)Li2FeSi tetrahedra, corners with two equivalent O(1)Li3Si tetrahedra, corners with four equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(3)Li3Si tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(3), and two equivalent Fe(1) atoms to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(1)Li3Si tetrahedra, corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with two equivalent O(3)Li3Si tetrahedra, corners with three equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(4)Li2FeSi tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Li(3), and one Si(1) atom to form OLi3Si tetrahedra that share corners with two equivalent O(2)Li2Fe2 tetrahedra, corners with three equivalent O(4)Li2FeSi tetrahedra, corners with three equivalent O(5)Li2FeSi tetrahedra, and corners with four equivalent O(1)Li3Si tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Li(3), one Fe(1), and one Si(1) atom to form OLi2FeSi tetrahedra that share  a cornercorner with one O(1)Li3Si tetrahedra, corners with two equivalent O(4)Li2FeSi tetrahedra, corners with two equivalent O(5)Li2FeSi tetrahedra, corners with three equivalent O(3)Li3Si tetrahedra, and corners with four equivalent O(2)Li2Fe2 tetrahedra. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Fe(1), and one Si(1) atom to form OLi2FeSi tetrahedra that share corners with two equivalent O(4)Li2FeSi tetrahedra, corners with three equivalent O(2)Li2Fe2 tetrahedra, corners with three equivalent O(3)Li3Si tetrahedra, and corners with four equivalent O(1)Li3Si tetrahedra. is represented by the CIF file [CIF]
data_Li3FeSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.946
_cell_length_b   5.473
_cell_length_c   15.804
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   427.797
_cell_formula_units_Z   4
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  0.003  0.664  0.592  1.0
  Li  Li1  1  0.003  0.164  0.908  1.0
  Li  Li2  1  0.007  0.665  0.006  1.0
  Li  Li3  1  0.007  0.165  0.494  1.0
  Li  Li4  1  0.503  0.836  0.092  1.0
  Li  Li5  1  0.504  0.320  0.805  1.0
  Li  Li6  1  0.504  0.820  0.695  1.0
  Li  Li7  1  0.503  0.336  0.408  1.0
  Li  Li8  1  0.507  0.835  0.506  1.0
  Li  Li9  1  0.507  0.335  0.994  1.0
  Li  Li10  1  0.004  0.180  0.305  1.0
  Li  Li11  1  0.004  0.680  0.195  1.0
  Fe  Fe12  1  0.004  0.669  0.803  1.0
  Fe  Fe13  1  0.504  0.831  0.303  1.0
  Fe  Fe14  1  0.504  0.331  0.197  1.0
  Fe  Fe15  1  0.004  0.169  0.697  1.0
  Si  Si16  1  0.010  0.664  0.403  1.0
  Si  Si17  1  0.510  0.336  0.597  1.0
  Si  Si18  1  0.510  0.836  0.903  1.0
  Si  Si19  1  0.010  0.164  0.097  1.0
  O  O20  1  0.110  0.317  0.014  1.0
  O  O21  1  0.101  0.834  0.701  1.0
  O  O22  1  0.101  0.334  0.799  1.0
  O  O23  1  0.107  0.883  0.101  1.0
  O  O24  1  0.107  0.383  0.399  1.0
  O  O25  1  0.110  0.817  0.486  1.0
  O  O26  1  0.115  0.312  0.186  1.0
  O  O27  1  0.115  0.812  0.314  1.0
  O  O28  1  0.169  0.320  0.602  1.0
  O  O29  1  0.169  0.820  0.898  1.0
  O  O30  1  0.610  0.183  0.514  1.0
  O  O31  1  0.601  0.666  0.201  1.0
  O  O32  1  0.601  0.166  0.299  1.0
  O  O33  1  0.607  0.617  0.601  1.0
  O  O34  1  0.607  0.117  0.899  1.0
  O  O35  1  0.610  0.683  0.986  1.0
  O  O36  1  0.615  0.188  0.686  1.0
  O  O37  1  0.615  0.688  0.814  1.0
  O  O38  1  0.669  0.180  0.102  1.0
  O  O39  1  0.669  0.680  0.398  1.0
[/CIF]
.