The crystal structure described by Li2SeO4 crystallizes in the triclinic P-1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(2), and one O(6) atom. In the second Li site, Li(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(8), and one O(9) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(11), one O(2), one O(6), one O(7), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(5), and one O(6) atom. In the fifth Li site, Li(5) is bonded in a 3-coordinate geometry to one O(10), one O(7), and one O(8) atom. In the sixth Li site, Li(6) is bonded to one O(10), one O(12), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Se(2)O4 tetrahedra and corners with two equivalent Se(1)O4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(10), one O(12), one O(2), and one O(9) atom to form SeO4 tetrahedra that share corners with two equivalent Li(6)O4 tetrahedra. In the second Se site, Se(2) is bonded to one O(1), one O(11), one O(3), and one O(4) atom to form SeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Li(1) and one Se(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Li(1), one Li(3), and one Se(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Li(4) and one Se(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(6), and one Se(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(6), and one Se(3) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(3), one Li(4), and one Se(3) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(5), and one O(7) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Li(2), one Li(5), and one Se(3) atom. In the ninth O site, O(9) is bonded in a T-shaped geometry to one Li(2), one Li(3), and one Se(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Li(5), one Li(6), and one Se(1) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Li(3) and one Se(2) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Li(1), one Li(6), and one Se(1) atom. is represented by the CIF file [CIF]
data_Li2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.634
_cell_length_b   9.072
_cell_length_c   9.087
_cell_angle_alpha   92.878
_cell_angle_beta   113.421
_cell_angle_gamma   104.852
_symmetry_Int_Tables_number   1
_cell_volume   622.035
_cell_formula_units_Z   6
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  0.751  0.548  0.463  1.0
  Li  Li1  1  0.249  0.452  0.537  1.0
  Li  Li2  1  0.705  0.093  0.919  1.0
  Li  Li3  1  0.656  0.360  0.811  1.0
  Li  Li4  1  0.437  0.823  0.611  1.0
  Li  Li5  1  0.344  0.640  0.189  1.0
  Li  Li6  1  0.866  0.728  0.066  1.0
  Li  Li7  1  0.078  0.901  0.639  1.0
  Li  Li8  1  0.563  0.177  0.389  1.0
  Li  Li9  1  0.295  0.907  0.081  1.0
  Li  Li10  1  0.134  0.272  0.934  1.0
  Li  Li11  1  0.922  0.099  0.361  1.0
  Se  Se12  1  0.318  0.217  0.699  1.0
  Se  Se13  1  0.682  0.783  0.301  1.0
  Se  Se14  1  0.285  0.688  0.817  1.0
  Se  Se15  1  0.866  0.267  0.653  1.0
  Se  Se16  1  0.715  0.312  0.183  1.0
  Se  Se17  1  0.134  0.733  0.347  1.0
  O  O18  1  0.838  0.411  0.370  1.0
  O  O19  1  0.422  0.407  0.747  1.0
  O  O20  1  0.510  0.212  0.169  1.0
  O  O21  1  0.811  0.177  0.155  1.0
  O  O22  1  0.162  0.589  0.630  1.0
  O  O23  1  0.223  0.886  0.505  1.0
  O  O24  1  0.315  0.661  0.396  1.0
  O  O25  1  0.047  0.469  0.050  1.0
  O  O26  1  0.871  0.188  0.828  1.0
  O  O27  1  0.480  0.134  0.755  1.0
  O  O28  1  0.953  0.531  0.950  1.0
  O  O29  1  0.815  0.852  0.209  1.0
  O  O30  1  0.578  0.593  0.253  1.0
  O  O31  1  0.685  0.339  0.604  1.0
  O  O32  1  0.291  0.573  0.954  1.0
  O  O33  1  0.184  0.197  0.499  1.0
  O  O34  1  0.816  0.803  0.501  1.0
  O  O35  1  0.709  0.427  0.046  1.0
  O  O36  1  0.777  0.114  0.495  1.0
  O  O37  1  0.520  0.866  0.245  1.0
  O  O38  1  0.189  0.823  0.845  1.0
  O  O39  1  0.490  0.788  0.831  1.0
  O  O40  1  0.185  0.148  0.791  1.0
  O  O41  1  0.129  0.812  0.172  1.0
[/CIF]
.
The crystal structure described by Li2SeO4 crystallizes in the triclinic P-1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(2), and one O(6) atom. In the second Li site, Li(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(8), and one O(9) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(11), one O(2), one O(6), one O(7), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(5), and one O(6) atom. In the fifth Li site, Li(5) is bonded in a 3-coordinate geometry to one O(10), one O(7), and one O(8) atom. In the sixth Li site, Li(6) is bonded to one O(10), one O(12), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Se(2)O4 tetrahedra and corners with two equivalent Se(1)O4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(10), one O(12), one O(2), and one O(9) atom to form SeO4 tetrahedra that share corners with two equivalent Li(6)O4 tetrahedra. In the second Se site, Se(2) is bonded to one O(1), one O(11), one O(3), and one O(4) atom to form SeO4 tetrahedra that share  a cornercorner with one Li(6)O4 tetrahedra. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Li(1) and one Se(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Li(1), one Li(3), and one Se(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Li(4) and one Se(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(6), and one Se(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(6), and one Se(3) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(3), one Li(4), and one Se(3) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(5), and one O(7) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Li(2), one Li(5), and one Se(3) atom. In the ninth O site, O(9) is bonded in a T-shaped geometry to one Li(2), one Li(3), and one Se(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Li(5), one Li(6), and one Se(1) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Li(3) and one Se(2) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Li(1), one Li(6), and one Se(1) atom. is represented by the CIF file [CIF]
data_Li2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.634
_cell_length_b   9.072
_cell_length_c   9.087
_cell_angle_alpha   92.878
_cell_angle_beta   113.421
_cell_angle_gamma   104.852
_symmetry_Int_Tables_number   1
_cell_volume   622.035
_cell_formula_units_Z   6
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  0.751  0.548  0.463  1.0
  Li  Li1  1  0.249  0.452  0.537  1.0
  Li  Li2  1  0.705  0.093  0.919  1.0
  Li  Li3  1  0.656  0.360  0.811  1.0
  Li  Li4  1  0.437  0.823  0.611  1.0
  Li  Li5  1  0.344  0.640  0.189  1.0
  Li  Li6  1  0.866  0.728  0.066  1.0
  Li  Li7  1  0.078  0.901  0.639  1.0
  Li  Li8  1  0.563  0.177  0.389  1.0
  Li  Li9  1  0.295  0.907  0.081  1.0
  Li  Li10  1  0.134  0.272  0.934  1.0
  Li  Li11  1  0.922  0.099  0.361  1.0
  Se  Se12  1  0.318  0.217  0.699  1.0
  Se  Se13  1  0.682  0.783  0.301  1.0
  Se  Se14  1  0.285  0.688  0.817  1.0
  Se  Se15  1  0.866  0.267  0.653  1.0
  Se  Se16  1  0.715  0.312  0.183  1.0
  Se  Se17  1  0.134  0.733  0.347  1.0
  O  O18  1  0.838  0.411  0.370  1.0
  O  O19  1  0.422  0.407  0.747  1.0
  O  O20  1  0.510  0.212  0.169  1.0
  O  O21  1  0.811  0.177  0.155  1.0
  O  O22  1  0.162  0.589  0.630  1.0
  O  O23  1  0.223  0.886  0.505  1.0
  O  O24  1  0.315  0.661  0.396  1.0
  O  O25  1  0.047  0.469  0.050  1.0
  O  O26  1  0.871  0.188  0.828  1.0
  O  O27  1  0.480  0.134  0.755  1.0
  O  O28  1  0.953  0.531  0.950  1.0
  O  O29  1  0.815  0.852  0.209  1.0
  O  O30  1  0.578  0.593  0.253  1.0
  O  O31  1  0.685  0.339  0.604  1.0
  O  O32  1  0.291  0.573  0.954  1.0
  O  O33  1  0.184  0.197  0.499  1.0
  O  O34  1  0.816  0.803  0.501  1.0
  O  O35  1  0.709  0.427  0.046  1.0
  O  O36  1  0.777  0.114  0.495  1.0
  O  O37  1  0.520  0.866  0.245  1.0
  O  O38  1  0.189  0.823  0.845  1.0
  O  O39  1  0.490  0.788  0.831  1.0
  O  O40  1  0.185  0.148  0.791  1.0
  O  O41  1  0.129  0.812  0.172  1.0
[/CIF]
.