The crystal structure described by Li2Cr(H2O3)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Cr(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form distorted LiO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Cr(1)O4 tetrahedra, and edges with two equivalent Li(2)O5 square pyramids. Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form CrO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Li(1)O4 tetrahedra. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) atom. There are six inequivalent O sites. In the first O site, O(2) is bonded to two equivalent Li(2), one H(3), and one H(4) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the third O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the fourth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Li(2), and one Cr(1) atom. In the fifth O site, O(6) is bonded in a linear geometry to one Li(1) and one Cr(1) atom. In the sixth O site, O(1) is bonded in a distorted water-like geometry to two equivalent Li(2), one H(1), and one H(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Cr(H2O3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.603
_cell_length_b   7.785
_cell_length_c   12.135
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   529.342
_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  0.177  0.138  0.872  1.0
  Li  Li1  1  0.677  0.362  0.128  1.0
  Li  Li2  1  0.823  0.638  0.628  1.0
  Li  Li3  1  0.323  0.862  0.372  1.0
  Li  Li4  1  0.080  0.204  0.501  1.0
  Li  Li5  1  0.580  0.296  0.499  1.0
  Li  Li6  1  0.920  0.704  0.999  1.0
  Li  Li7  1  0.420  0.796  0.001  1.0
  Cr  Cr8  1  0.176  0.118  0.135  1.0
  Cr  Cr9  1  0.676  0.382  0.865  1.0
  Cr  Cr10  1  0.824  0.618  0.365  1.0
  Cr  Cr11  1  0.324  0.882  0.635  1.0
  H  H12  1  0.261  0.485  0.614  1.0
  H  H13  1  0.761  0.015  0.386  1.0
  H  H14  1  0.739  0.985  0.886  1.0
  H  H15  1  0.239  0.515  0.114  1.0
  H  H16  1  0.325  0.329  0.688  1.0
  H  H17  1  0.825  0.171  0.312  1.0
  H  H18  1  0.675  0.829  0.812  1.0
  H  H19  1  0.175  0.671  0.188  1.0
  H  H20  1  0.335  0.285  0.314  1.0
  H  H21  1  0.835  0.215  0.686  1.0
  H  H22  1  0.665  0.785  0.186  1.0
  H  H23  1  0.165  0.715  0.814  1.0
  H  H24  1  0.253  0.451  0.374  1.0
  H  H25  1  0.753  0.049  0.626  1.0
  H  H26  1  0.747  0.951  0.126  1.0
  H  H27  1  0.247  0.549  0.874  1.0
  O  O28  1  0.299  0.360  0.610  1.0
  O  O29  1  0.799  0.140  0.390  1.0
  O  O30  1  0.701  0.860  0.890  1.0
  O  O31  1  0.201  0.640  0.110  1.0
  O  O32  1  0.301  0.330  0.388  1.0
  O  O33  1  0.801  0.170  0.612  1.0
  O  O34  1  0.699  0.830  0.112  1.0
  O  O35  1  0.199  0.670  0.888  1.0
  O  O36  1  0.330  0.302  0.138  1.0
  O  O37  1  0.830  0.198  0.862  1.0
  O  O38  1  0.670  0.802  0.362  1.0
  O  O39  1  0.171  0.698  0.638  1.0
  O  O40  1  0.383  0.343  0.849  1.0
  O  O41  1  0.883  0.157  0.151  1.0
  O  O42  1  0.617  0.843  0.651  1.0
  O  O43  1  0.117  0.657  0.349  1.0
  O  O44  1  0.222  0.017  0.015  1.0
  O  O45  1  0.722  0.483  0.985  1.0
  O  O46  1  0.778  0.517  0.485  1.0
  O  O47  1  0.278  0.983  0.515  1.0
  O  O48  1  0.234  0.003  0.737  1.0
  O  O49  1  0.734  0.497  0.263  1.0
  O  O50  1  0.766  0.503  0.763  1.0
  O  O51  1  0.266  0.997  0.237  1.0
[/CIF]
.
The crystal structure described by Li2Cr(H2O3)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Cr(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form distorted LiO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Cr(1)O4 tetrahedra, and edges with two equivalent Li(2)O5 square pyramids. Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form CrO4 tetrahedra that share  a cornercorner with one Li(2)O5 square pyramid and corners with four equivalent Li(1)O4 tetrahedra. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) atom. There are six inequivalent O sites. In the first O site, O(2) is bonded to two equivalent Li(2), one H(3), and one H(4) atom to form distorted corner-sharing OLi2H2 tetrahedra. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the third O site, O(4) is bonded in a 2-coordinate geometry to one Li(1) and one Cr(1) atom. In the fourth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Li(2), and one Cr(1) atom. In the fifth O site, O(6) is bonded in a linear geometry to one Li(1) and one Cr(1) atom. In the sixth O site, O(1) is bonded in a distorted water-like geometry to two equivalent Li(2), one H(1), and one H(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Cr(H2O3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.603
_cell_length_b   7.785
_cell_length_c   12.135
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   529.342
_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  0.177  0.138  0.872  1.0
  Li  Li1  1  0.677  0.362  0.128  1.0
  Li  Li2  1  0.823  0.638  0.628  1.0
  Li  Li3  1  0.323  0.862  0.372  1.0
  Li  Li4  1  0.080  0.204  0.501  1.0
  Li  Li5  1  0.580  0.296  0.499  1.0
  Li  Li6  1  0.920  0.704  0.999  1.0
  Li  Li7  1  0.420  0.796  0.001  1.0
  Cr  Cr8  1  0.176  0.118  0.135  1.0
  Cr  Cr9  1  0.676  0.382  0.865  1.0
  Cr  Cr10  1  0.824  0.618  0.365  1.0
  Cr  Cr11  1  0.324  0.882  0.635  1.0
  H  H12  1  0.261  0.485  0.614  1.0
  H  H13  1  0.761  0.015  0.386  1.0
  H  H14  1  0.739  0.985  0.886  1.0
  H  H15  1  0.239  0.515  0.114  1.0
  H  H16  1  0.325  0.329  0.688  1.0
  H  H17  1  0.825  0.171  0.312  1.0
  H  H18  1  0.675  0.829  0.812  1.0
  H  H19  1  0.175  0.671  0.188  1.0
  H  H20  1  0.335  0.285  0.314  1.0
  H  H21  1  0.835  0.215  0.686  1.0
  H  H22  1  0.665  0.785  0.186  1.0
  H  H23  1  0.165  0.715  0.814  1.0
  H  H24  1  0.253  0.451  0.374  1.0
  H  H25  1  0.753  0.049  0.626  1.0
  H  H26  1  0.747  0.951  0.126  1.0
  H  H27  1  0.247  0.549  0.874  1.0
  O  O28  1  0.299  0.360  0.610  1.0
  O  O29  1  0.799  0.140  0.390  1.0
  O  O30  1  0.701  0.860  0.890  1.0
  O  O31  1  0.201  0.640  0.110  1.0
  O  O32  1  0.301  0.330  0.388  1.0
  O  O33  1  0.801  0.170  0.612  1.0
  O  O34  1  0.699  0.830  0.112  1.0
  O  O35  1  0.199  0.670  0.888  1.0
  O  O36  1  0.330  0.302  0.138  1.0
  O  O37  1  0.830  0.198  0.862  1.0
  O  O38  1  0.670  0.802  0.362  1.0
  O  O39  1  0.171  0.698  0.638  1.0
  O  O40  1  0.383  0.343  0.849  1.0
  O  O41  1  0.883  0.157  0.151  1.0
  O  O42  1  0.617  0.843  0.651  1.0
  O  O43  1  0.117  0.657  0.349  1.0
  O  O44  1  0.222  0.017  0.015  1.0
  O  O45  1  0.722  0.483  0.985  1.0
  O  O46  1  0.778  0.517  0.485  1.0
  O  O47  1  0.278  0.983  0.515  1.0
  O  O48  1  0.234  0.003  0.737  1.0
  O  O49  1  0.734  0.497  0.263  1.0
  O  O50  1  0.766  0.503  0.763  1.0
  O  O51  1  0.266  0.997  0.237  1.0
[/CIF]
.