The compound described by Li2FeCO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form a mixture of corner and edge-sharing LiO4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of corner and edge-sharing LiO4 tetrahedra. Fe(1) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), and one C(1) atom to form distorted OLi3C tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(1)Li3C tetrahedra, and  an edgeedge with one O(4)Li2Fe2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Fe(1), and one C(1) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), and two equivalent Fe(1) atoms to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(1)Li3C tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, and  an edgeedge with one O(1)Li3C tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2FeCO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.934
_cell_length_b   7.260
_cell_length_c   10.486
_cell_angle_alpha   78.832
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   368.506
_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  0.673  0.877  0.797  1.0
  Li  Li1  1  0.827  0.877  0.297  1.0
  Li  Li2  1  0.817  0.793  0.577  1.0
  Li  Li3  1  0.683  0.793  0.077  1.0
  Li  Li4  1  0.317  0.207  0.923  1.0
  Li  Li5  1  0.183  0.207  0.423  1.0
  Li  Li6  1  0.173  0.123  0.703  1.0
  Li  Li7  1  0.327  0.123  0.203  1.0
  Fe  Fe8  1  0.842  0.449  0.827  1.0
  Fe  Fe9  1  0.342  0.551  0.673  1.0
  Fe  Fe10  1  0.658  0.449  0.327  1.0
  Fe  Fe11  1  0.158  0.551  0.173  1.0
  C  C12  1  0.192  0.837  0.938  1.0
  C  C13  1  0.308  0.837  0.438  1.0
  C  C14  1  0.692  0.163  0.562  1.0
  C  C15  1  0.808  0.163  0.062  1.0
  O  O16  1  0.329  0.960  0.859  1.0
  O  O17  1  0.171  0.960  0.359  1.0
  O  O18  1  0.934  0.829  0.936  1.0
  O  O19  1  0.566  0.829  0.436  1.0
  O  O20  1  0.171  0.718  0.525  1.0
  O  O21  1  0.658  0.652  0.729  1.0
  O  O22  1  0.329  0.718  0.025  1.0
  O  O23  1  0.842  0.652  0.229  1.0
  O  O24  1  0.158  0.348  0.771  1.0
  O  O25  1  0.671  0.282  0.975  1.0
  O  O26  1  0.342  0.348  0.271  1.0
  O  O27  1  0.829  0.282  0.475  1.0
  O  O28  1  0.434  0.171  0.564  1.0
  O  O29  1  0.066  0.171  0.064  1.0
  O  O30  1  0.829  0.040  0.641  1.0
  O  O31  1  0.671  0.040  0.141  1.0
[/CIF]
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The compound described by Li2FeCO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form a mixture of corner and edge-sharing LiO4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of corner and edge-sharing LiO4 tetrahedra. Fe(1) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), and one C(1) atom to form distorted OLi3C tetrahedra that share  a cornercorner with one O(4)Li2Fe2 tetrahedra, corners with two equivalent O(1)Li3C tetrahedra, and  an edgeedge with one O(4)Li2Fe2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Fe(1), and one C(1) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), and two equivalent Fe(1) atoms to form OLi2Fe2 tetrahedra that share  a cornercorner with one O(1)Li3C tetrahedra, corners with two equivalent O(4)Li2Fe2 tetrahedra, and  an edgeedge with one O(1)Li3C tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2FeCO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.934
_cell_length_b   7.260
_cell_length_c   10.486
_cell_angle_alpha   78.832
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   368.506
_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  0.673  0.877  0.797  1.0
  Li  Li1  1  0.827  0.877  0.297  1.0
  Li  Li2  1  0.817  0.793  0.577  1.0
  Li  Li3  1  0.683  0.793  0.077  1.0
  Li  Li4  1  0.317  0.207  0.923  1.0
  Li  Li5  1  0.183  0.207  0.423  1.0
  Li  Li6  1  0.173  0.123  0.703  1.0
  Li  Li7  1  0.327  0.123  0.203  1.0
  Fe  Fe8  1  0.842  0.449  0.827  1.0
  Fe  Fe9  1  0.342  0.551  0.673  1.0
  Fe  Fe10  1  0.658  0.449  0.327  1.0
  Fe  Fe11  1  0.158  0.551  0.173  1.0
  C  C12  1  0.192  0.837  0.938  1.0
  C  C13  1  0.308  0.837  0.438  1.0
  C  C14  1  0.692  0.163  0.562  1.0
  C  C15  1  0.808  0.163  0.062  1.0
  O  O16  1  0.329  0.960  0.859  1.0
  O  O17  1  0.171  0.960  0.359  1.0
  O  O18  1  0.934  0.829  0.936  1.0
  O  O19  1  0.566  0.829  0.436  1.0
  O  O20  1  0.171  0.718  0.525  1.0
  O  O21  1  0.658  0.652  0.729  1.0
  O  O22  1  0.329  0.718  0.025  1.0
  O  O23  1  0.842  0.652  0.229  1.0
  O  O24  1  0.158  0.348  0.771  1.0
  O  O25  1  0.671  0.282  0.975  1.0
  O  O26  1  0.342  0.348  0.271  1.0
  O  O27  1  0.829  0.282  0.475  1.0
  O  O28  1  0.434  0.171  0.564  1.0
  O  O29  1  0.066  0.171  0.064  1.0
  O  O30  1  0.829  0.040  0.641  1.0
  O  O31  1  0.671  0.040  0.141  1.0
[/CIF]
.