The material structure described by Li4Bi2O5 crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing LiO4 trigonal pyramids. In the second Li site, Li(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing LiO4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form a mixture of corner and edge-sharing LiO4 trigonal pyramids. In the fourth Li site, Li(4) is bonded in a distorted trigonal non-coplanar geometry to one O(5) and two equivalent O(1) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), two equivalent Li(4), and one Bi(2) atom to form distorted OLi3Bi trigonal pyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with two equivalent O(4)Li4Bi trigonal bipyramids, corners with two equivalent O(2)Li2Bi2 trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid, and  an edgeedge with one O(1)Li3Bi trigonal pyramid. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Bi(1), and one Bi(2) atom to form distorted OLi2Bi2 trigonal pyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with three equivalent O(4)Li4Bi trigonal bipyramids,  a cornercorner with one O(3)Li3Bi trigonal pyramid, corners with two equivalent O(1)Li3Bi trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the third O site, O(3) is bonded to one Li(2), two equivalent Li(1), and one Bi(1) atom to form distorted OLi3Bi trigonal pyramids that share corners with two equivalent O(4)Li4Bi trigonal bipyramids, corners with three equivalent O(5)Li3Bi2 trigonal bipyramids,  a cornercorner with one O(2)Li2Bi2 trigonal pyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid,  an edgeedge with one O(2)Li2Bi2 trigonal pyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), two equivalent Li(2), and one Bi(2) atom to form distorted OLi4Bi trigonal bipyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with two equivalent O(1)Li3Bi trigonal pyramids, corners with two equivalent O(3)Li3Bi trigonal pyramids, corners with three equivalent O(2)Li2Bi2 trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(2), one Li(3), one Li(4), and two equivalent Bi(1) atoms to form distorted OLi3Bi2 trigonal bipyramids that share  a cornercorner with one O(4)Li4Bi trigonal bipyramid,  a cornercorner with one O(2)Li2Bi2 trigonal pyramid,  a cornercorner with one O(1)Li3Bi trigonal pyramid, corners with three equivalent O(3)Li3Bi trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid,  an edgeedge with one O(2)Li2Bi2 trigonal pyramid, and  an edgeedge with one O(1)Li3Bi trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Bi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.541
_cell_length_b   7.691
_cell_length_c   7.981
_cell_angle_alpha   89.288
_cell_angle_beta   109.518
_cell_angle_gamma   108.144
_symmetry_Int_Tables_number   1
_cell_volume   303.013
_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  0.327  0.811  0.471  1.0
  Li  Li1  1  0.136  0.989  0.655  1.0
  Li  Li2  1  0.141  0.354  0.338  1.0
  Li  Li3  1  0.110  0.672  0.013  1.0
  Li  Li4  1  0.890  0.328  0.987  1.0
  Li  Li5  1  0.859  0.646  0.662  1.0
  Li  Li6  1  0.864  0.011  0.345  1.0
  Li  Li7  1  0.673  0.189  0.529  1.0
  Bi  Bi8  1  0.347  0.123  0.121  1.0
  Bi  Bi9  1  0.315  0.401  0.752  1.0
  Bi  Bi10  1  0.685  0.599  0.248  1.0
  Bi  Bi11  1  0.653  0.877  0.879  1.0
  O  O12  1  0.971  0.517  0.178  1.0
  O  O13  1  0.484  0.646  0.642  1.0
  O  O14  1  0.468  0.944  0.298  1.0
  O  O15  1  0.042  0.216  0.532  1.0
  O  O16  1  0.956  0.117  0.126  1.0
  O  O17  1  0.044  0.883  0.874  1.0
  O  O18  1  0.958  0.784  0.468  1.0
  O  O19  1  0.532  0.056  0.702  1.0
  O  O20  1  0.516  0.354  0.358  1.0
  O  O21  1  0.029  0.483  0.822  1.0
[/CIF]
.
The material structure described by Li4Bi2O5 crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing LiO4 trigonal pyramids. In the second Li site, Li(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing LiO4 tetrahedra. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form a mixture of corner and edge-sharing LiO4 trigonal pyramids. In the fourth Li site, Li(4) is bonded in a distorted trigonal non-coplanar geometry to one O(5) and two equivalent O(1) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), two equivalent Li(4), and one Bi(2) atom to form distorted OLi3Bi trigonal pyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with two equivalent O(4)Li4Bi trigonal bipyramids, corners with two equivalent O(2)Li2Bi2 trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid, and  an edgeedge with one O(1)Li3Bi trigonal pyramid. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Bi(1), and one Bi(2) atom to form distorted OLi2Bi2 trigonal pyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with three equivalent O(4)Li4Bi trigonal bipyramids,  a cornercorner with one O(3)Li3Bi trigonal pyramid, corners with two equivalent O(1)Li3Bi trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the third O site, O(3) is bonded to one Li(2), two equivalent Li(1), and one Bi(1) atom to form distorted OLi3Bi trigonal pyramids that share corners with two equivalent O(4)Li4Bi trigonal bipyramids, corners with three equivalent O(5)Li3Bi2 trigonal bipyramids,  a cornercorner with one O(2)Li2Bi2 trigonal pyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid,  an edgeedge with one O(2)Li2Bi2 trigonal pyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), two equivalent Li(2), and one Bi(2) atom to form distorted OLi4Bi trigonal bipyramids that share  a cornercorner with one O(5)Li3Bi2 trigonal bipyramid, corners with two equivalent O(1)Li3Bi trigonal pyramids, corners with two equivalent O(3)Li3Bi trigonal pyramids, corners with three equivalent O(2)Li2Bi2 trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid, and  an edgeedge with one O(3)Li3Bi trigonal pyramid. In the fifth O site, O(5) is bonded to one Li(2), one Li(3), one Li(4), and two equivalent Bi(1) atoms to form distorted OLi3Bi2 trigonal bipyramids that share  a cornercorner with one O(4)Li4Bi trigonal bipyramid,  a cornercorner with one O(2)Li2Bi2 trigonal pyramid,  a cornercorner with one O(1)Li3Bi trigonal pyramid, corners with three equivalent O(3)Li3Bi trigonal pyramids,  an edgeedge with one O(5)Li3Bi2 trigonal bipyramid,  an edgeedge with one O(4)Li4Bi trigonal bipyramid,  an edgeedge with one O(2)Li2Bi2 trigonal pyramid, and  an edgeedge with one O(1)Li3Bi trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Bi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.541
_cell_length_b   7.691
_cell_length_c   7.981
_cell_angle_alpha   89.288
_cell_angle_beta   109.518
_cell_angle_gamma   108.144
_symmetry_Int_Tables_number   1
_cell_volume   303.013
_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  0.327  0.811  0.471  1.0
  Li  Li1  1  0.136  0.989  0.655  1.0
  Li  Li2  1  0.141  0.354  0.338  1.0
  Li  Li3  1  0.110  0.672  0.013  1.0
  Li  Li4  1  0.890  0.328  0.987  1.0
  Li  Li5  1  0.859  0.646  0.662  1.0
  Li  Li6  1  0.864  0.011  0.345  1.0
  Li  Li7  1  0.673  0.189  0.529  1.0
  Bi  Bi8  1  0.347  0.123  0.121  1.0
  Bi  Bi9  1  0.315  0.401  0.752  1.0
  Bi  Bi10  1  0.685  0.599  0.248  1.0
  Bi  Bi11  1  0.653  0.877  0.879  1.0
  O  O12  1  0.971  0.517  0.178  1.0
  O  O13  1  0.484  0.646  0.642  1.0
  O  O14  1  0.468  0.944  0.298  1.0
  O  O15  1  0.042  0.216  0.532  1.0
  O  O16  1  0.956  0.117  0.126  1.0
  O  O17  1  0.044  0.883  0.874  1.0
  O  O18  1  0.958  0.784  0.468  1.0
  O  O19  1  0.532  0.056  0.702  1.0
  O  O20  1  0.516  0.354  0.358  1.0
  O  O21  1  0.029  0.483  0.822  1.0
[/CIF]
.