The material structure described by Li2SeO7 crystallizes in the orthorhombic Pnna space group. Li(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Se(1) is bonded in a distorted water-like geometry to two equivalent O(1) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in an L-shaped geometry to one Li(1) and one Se(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Se(1), and one O(3) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Li(1) and one O(2) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(1) and two equivalent O(1) atoms. is represented by the CIF card [CIF]
data_Li2SeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.712
_cell_length_b   6.666
_cell_length_c   12.391
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   554.417
_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  0.009  0.169  0.889  1.0
  Li  Li1  1  0.491  0.169  0.111  1.0
  Li  Li2  1  0.009  0.331  0.611  1.0
  Li  Li3  1  0.491  0.331  0.389  1.0
  Li  Li4  1  0.991  0.831  0.111  1.0
  Li  Li5  1  0.509  0.831  0.889  1.0
  Li  Li6  1  0.991  0.669  0.389  1.0
  Li  Li7  1  0.509  0.669  0.611  1.0
  Se  Se8  1  0.791  0.250  0.250  1.0
  Se  Se9  1  0.709  0.250  0.750  1.0
  Se  Se10  1  0.209  0.750  0.750  1.0
  Se  Se11  1  0.291  0.750  0.250  1.0
  O  O12  1  0.265  0.964  0.097  1.0
  O  O13  1  0.235  0.964  0.903  1.0
  O  O14  1  0.265  0.536  0.403  1.0
  O  O15  1  0.235  0.536  0.597  1.0
  O  O16  1  0.735  0.036  0.903  1.0
  O  O17  1  0.765  0.036  0.097  1.0
  O  O18  1  0.735  0.464  0.597  1.0
  O  O19  1  0.765  0.464  0.403  1.0
  O  O20  1  0.158  0.367  0.998  1.0
  O  O21  1  0.342  0.367  0.002  1.0
  O  O22  1  0.158  0.133  0.502  1.0
  O  O23  1  0.342  0.133  0.498  1.0
  O  O24  1  0.842  0.633  0.002  1.0
  O  O25  1  0.658  0.633  0.998  1.0
  O  O26  1  0.842  0.867  0.498  1.0
  O  O27  1  0.658  0.867  0.502  1.0
  O  O28  1  0.250  0.838  0.000  1.0
  O  O29  1  0.250  0.662  0.500  1.0
  O  O30  1  0.750  0.162  0.000  1.0
  O  O31  1  0.750  0.338  0.500  1.0
  O  O32  1  0.635  0.412  0.191  1.0
  O  O33  1  0.865  0.412  0.809  1.0
  O  O34  1  0.635  0.088  0.309  1.0
  O  O35  1  0.865  0.088  0.691  1.0
  O  O36  1  0.365  0.588  0.809  1.0
  O  O37  1  0.135  0.588  0.191  1.0
  O  O38  1  0.365  0.912  0.691  1.0
  O  O39  1  0.135  0.912  0.309  1.0
[/CIF]
.
The material structure described by Li2SeO7 crystallizes in the orthorhombic Pnna space group. Li(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Se(1) is bonded in a distorted water-like geometry to two equivalent O(1) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in an L-shaped geometry to one Li(1) and one Se(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Se(1), and one O(3) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Li(1) and one O(2) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(1) and two equivalent O(1) atoms. is represented by the CIF card [CIF]
data_Li2SeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.712
_cell_length_b   6.666
_cell_length_c   12.391
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   554.417
_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  0.009  0.169  0.889  1.0
  Li  Li1  1  0.491  0.169  0.111  1.0
  Li  Li2  1  0.009  0.331  0.611  1.0
  Li  Li3  1  0.491  0.331  0.389  1.0
  Li  Li4  1  0.991  0.831  0.111  1.0
  Li  Li5  1  0.509  0.831  0.889  1.0
  Li  Li6  1  0.991  0.669  0.389  1.0
  Li  Li7  1  0.509  0.669  0.611  1.0
  Se  Se8  1  0.791  0.250  0.250  1.0
  Se  Se9  1  0.709  0.250  0.750  1.0
  Se  Se10  1  0.209  0.750  0.750  1.0
  Se  Se11  1  0.291  0.750  0.250  1.0
  O  O12  1  0.265  0.964  0.097  1.0
  O  O13  1  0.235  0.964  0.903  1.0
  O  O14  1  0.265  0.536  0.403  1.0
  O  O15  1  0.235  0.536  0.597  1.0
  O  O16  1  0.735  0.036  0.903  1.0
  O  O17  1  0.765  0.036  0.097  1.0
  O  O18  1  0.735  0.464  0.597  1.0
  O  O19  1  0.765  0.464  0.403  1.0
  O  O20  1  0.158  0.367  0.998  1.0
  O  O21  1  0.342  0.367  0.002  1.0
  O  O22  1  0.158  0.133  0.502  1.0
  O  O23  1  0.342  0.133  0.498  1.0
  O  O24  1  0.842  0.633  0.002  1.0
  O  O25  1  0.658  0.633  0.998  1.0
  O  O26  1  0.842  0.867  0.498  1.0
  O  O27  1  0.658  0.867  0.502  1.0
  O  O28  1  0.250  0.838  0.000  1.0
  O  O29  1  0.250  0.662  0.500  1.0
  O  O30  1  0.750  0.162  0.000  1.0
  O  O31  1  0.750  0.338  0.500  1.0
  O  O32  1  0.635  0.412  0.191  1.0
  O  O33  1  0.865  0.412  0.809  1.0
  O  O34  1  0.635  0.088  0.309  1.0
  O  O35  1  0.865  0.088  0.691  1.0
  O  O36  1  0.365  0.588  0.809  1.0
  O  O37  1  0.135  0.588  0.191  1.0
  O  O38  1  0.365  0.912  0.691  1.0
  O  O39  1  0.135  0.912  0.309  1.0
[/CIF]
.