The structure described by Li2MnCO4 is Clathrate-derived structured and 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 LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 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 LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Mn(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. 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)Li2Mn2 tetrahedra, corners with two equivalent O(1)Li3C tetrahedra, and  an edgeedge with one O(4)Li2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Mn(1), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Mn(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 Mn(1) atoms to form OLi2Mn2 tetrahedra that share  a cornercorner with one O(1)Li3C tetrahedra, corners with two equivalent O(4)Li2Mn2 tetrahedra, and  an edgeedge with one O(1)Li3C tetrahedra. is represented by the CIF file [CIF]
data_Li2MnCO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.120
_cell_length_b   6.855
_cell_length_c   11.041
_cell_angle_alpha   84.401
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   385.652
_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  0.653  0.882  0.786  1.0
  Li  Li1  1  0.847  0.882  0.286  1.0
  Li  Li2  1  0.815  0.781  0.571  1.0
  Li  Li3  1  0.685  0.781  0.071  1.0
  Li  Li4  1  0.315  0.219  0.929  1.0
  Li  Li5  1  0.185  0.219  0.429  1.0
  Li  Li6  1  0.153  0.118  0.714  1.0
  Li  Li7  1  0.347  0.118  0.214  1.0
  Mn  Mn8  1  0.854  0.485  0.844  1.0
  Mn  Mn9  1  0.354  0.515  0.656  1.0
  Mn  Mn10  1  0.646  0.485  0.344  1.0
  Mn  Mn11  1  0.146  0.515  0.156  1.0
  C  C12  1  0.187  0.813  0.936  1.0
  C  C13  1  0.313  0.813  0.436  1.0
  C  C14  1  0.687  0.187  0.564  1.0
  C  C15  1  0.813  0.187  0.064  1.0
  O  O16  1  0.299  0.940  0.857  1.0
  O  O17  1  0.201  0.940  0.357  1.0
  O  O18  1  0.936  0.776  0.927  1.0
  O  O19  1  0.564  0.776  0.427  1.0
  O  O20  1  0.176  0.724  0.523  1.0
  O  O21  1  0.673  0.645  0.710  1.0
  O  O22  1  0.324  0.724  0.023  1.0
  O  O23  1  0.827  0.645  0.210  1.0
  O  O24  1  0.173  0.355  0.790  1.0
  O  O25  1  0.676  0.276  0.977  1.0
  O  O26  1  0.327  0.355  0.290  1.0
  O  O27  1  0.824  0.276  0.477  1.0
  O  O28  1  0.436  0.224  0.573  1.0
  O  O29  1  0.064  0.224  0.073  1.0
  O  O30  1  0.799  0.060  0.643  1.0
  O  O31  1  0.701  0.060  0.143  1.0
[/CIF]
.
The structure described by Li2MnCO4 is Clathrate-derived structured and 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 LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 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 LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. Mn(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Li(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. 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)Li2Mn2 tetrahedra, corners with two equivalent O(1)Li3C tetrahedra, and  an edgeedge with one O(4)Li2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Mn(1), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Mn(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 Mn(1) atoms to form OLi2Mn2 tetrahedra that share  a cornercorner with one O(1)Li3C tetrahedra, corners with two equivalent O(4)Li2Mn2 tetrahedra, and  an edgeedge with one O(1)Li3C tetrahedra. is represented by the CIF file [CIF]
data_Li2MnCO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.120
_cell_length_b   6.855
_cell_length_c   11.041
_cell_angle_alpha   84.401
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   385.652
_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  0.653  0.882  0.786  1.0
  Li  Li1  1  0.847  0.882  0.286  1.0
  Li  Li2  1  0.815  0.781  0.571  1.0
  Li  Li3  1  0.685  0.781  0.071  1.0
  Li  Li4  1  0.315  0.219  0.929  1.0
  Li  Li5  1  0.185  0.219  0.429  1.0
  Li  Li6  1  0.153  0.118  0.714  1.0
  Li  Li7  1  0.347  0.118  0.214  1.0
  Mn  Mn8  1  0.854  0.485  0.844  1.0
  Mn  Mn9  1  0.354  0.515  0.656  1.0
  Mn  Mn10  1  0.646  0.485  0.344  1.0
  Mn  Mn11  1  0.146  0.515  0.156  1.0
  C  C12  1  0.187  0.813  0.936  1.0
  C  C13  1  0.313  0.813  0.436  1.0
  C  C14  1  0.687  0.187  0.564  1.0
  C  C15  1  0.813  0.187  0.064  1.0
  O  O16  1  0.299  0.940  0.857  1.0
  O  O17  1  0.201  0.940  0.357  1.0
  O  O18  1  0.936  0.776  0.927  1.0
  O  O19  1  0.564  0.776  0.427  1.0
  O  O20  1  0.176  0.724  0.523  1.0
  O  O21  1  0.673  0.645  0.710  1.0
  O  O22  1  0.324  0.724  0.023  1.0
  O  O23  1  0.827  0.645  0.210  1.0
  O  O24  1  0.173  0.355  0.790  1.0
  O  O25  1  0.676  0.276  0.977  1.0
  O  O26  1  0.327  0.355  0.290  1.0
  O  O27  1  0.824  0.276  0.477  1.0
  O  O28  1  0.436  0.224  0.573  1.0
  O  O29  1  0.064  0.224  0.073  1.0
  O  O30  1  0.799  0.060  0.643  1.0
  O  O31  1  0.701  0.060  0.143  1.0
[/CIF]
.