The material described by Li2MnSiO4 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(3), and two equivalent O(1) atoms to form LiO4 trigonal pyramids that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Li(2)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 four equivalent Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Li(1)O4 trigonal pyramid. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Li(2)O4 tetrahedra and corners with four equivalent Li(1)O4 trigonal pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), one Mn(1), and one Si(1) atom to form distorted OLi3MnSi trigonal bipyramids that share corners with two equivalent O(1)Li3MnSi trigonal bipyramids,  a cornercorner with one O(3)Li2MnSi trigonal pyramid, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with five equivalent O(2)Li2MnSi trigonal pyramids,  an edgeedge with one O(4)LiMn2Si trigonal pyramid, and edges with two equivalent O(3)Li2MnSi trigonal pyramids. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form distorted OLi2MnSi trigonal pyramids that share corners with five equivalent O(1)Li3MnSi trigonal bipyramids, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with four equivalent O(3)Li2MnSi trigonal pyramids, and  an edgeedge with one O(4)LiMn2Si trigonal pyramid. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form distorted OLi2MnSi trigonal pyramids that share  a cornercorner with one O(1)Li3MnSi trigonal bipyramid, corners with four equivalent O(2)Li2MnSi trigonal pyramids, corners with four equivalent O(4)LiMn2Si trigonal pyramids, and edges with two equivalent O(1)Li3MnSi trigonal bipyramids. In the fourth O site, O(4) is bonded to one Li(2), two equivalent Mn(1), and one Si(1) atom to form distorted OLiMn2Si trigonal pyramids that share corners with two equivalent O(1)Li3MnSi trigonal bipyramids, corners with two equivalent O(2)Li2MnSi trigonal pyramids, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with four equivalent O(3)Li2MnSi trigonal pyramids,  an edgeedge with one O(1)Li3MnSi trigonal bipyramid, and  an edgeedge with one O(2)Li2MnSi trigonal pyramid. is represented by the CIF file [CIF]
data_Li2MnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.468
_cell_length_b   5.984
_cell_length_c   11.061
_cell_angle_alpha   82.706
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   358.984
_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  0.322  0.043  0.832  1.0
  Li  Li1  1  0.178  0.043  0.332  1.0
  Li  Li2  1  0.180  0.226  0.573  1.0
  Li  Li3  1  0.320  0.226  0.073  1.0
  Li  Li4  1  0.680  0.774  0.927  1.0
  Li  Li5  1  0.820  0.774  0.427  1.0
  Li  Li6  1  0.822  0.957  0.668  1.0
  Li  Li7  1  0.678  0.957  0.168  1.0
  Mn  Mn8  1  0.179  0.575  0.832  1.0
  Mn  Mn9  1  0.679  0.425  0.668  1.0
  Mn  Mn10  1  0.321  0.575  0.332  1.0
  Mn  Mn11  1  0.821  0.425  0.168  1.0
  Si  Si12  1  0.818  0.257  0.911  1.0
  Si  Si13  1  0.682  0.257  0.411  1.0
  Si  Si14  1  0.318  0.743  0.589  1.0
  Si  Si15  1  0.182  0.743  0.089  1.0
  O  O16  1  0.695  0.091  0.820  1.0
  O  O17  1  0.805  0.091  0.320  1.0
  O  O18  1  0.117  0.237  0.925  1.0
  O  O19  1  0.383  0.237  0.425  1.0
  O  O20  1  0.825  0.239  0.543  1.0
  O  O21  1  0.286  0.478  0.663  1.0
  O  O22  1  0.675  0.239  0.043  1.0
  O  O23  1  0.214  0.478  0.163  1.0
  O  O24  1  0.786  0.522  0.837  1.0
  O  O25  1  0.325  0.761  0.957  1.0
  O  O26  1  0.714  0.522  0.337  1.0
  O  O27  1  0.175  0.761  0.457  1.0
  O  O28  1  0.617  0.763  0.575  1.0
  O  O29  1  0.883  0.763  0.075  1.0
  O  O30  1  0.195  0.909  0.680  1.0
  O  O31  1  0.305  0.909  0.180  1.0
[/CIF]
.
The material described by Li2MnSiO4 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(3), and two equivalent O(1) atoms to form LiO4 trigonal pyramids that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Li(2)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 four equivalent Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Li(1)O4 trigonal pyramid. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Li(2)O4 tetrahedra and corners with four equivalent Li(1)O4 trigonal pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), one Mn(1), and one Si(1) atom to form distorted OLi3MnSi trigonal bipyramids that share corners with two equivalent O(1)Li3MnSi trigonal bipyramids,  a cornercorner with one O(3)Li2MnSi trigonal pyramid, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with five equivalent O(2)Li2MnSi trigonal pyramids,  an edgeedge with one O(4)LiMn2Si trigonal pyramid, and edges with two equivalent O(3)Li2MnSi trigonal pyramids. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form distorted OLi2MnSi trigonal pyramids that share corners with five equivalent O(1)Li3MnSi trigonal bipyramids, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with four equivalent O(3)Li2MnSi trigonal pyramids, and  an edgeedge with one O(4)LiMn2Si trigonal pyramid. In the third O site, O(3) is bonded to one Li(1), one Li(2), one Mn(1), and one Si(1) atom to form distorted OLi2MnSi trigonal pyramids that share  a cornercorner with one O(1)Li3MnSi trigonal bipyramid, corners with four equivalent O(2)Li2MnSi trigonal pyramids, corners with four equivalent O(4)LiMn2Si trigonal pyramids, and edges with two equivalent O(1)Li3MnSi trigonal bipyramids. In the fourth O site, O(4) is bonded to one Li(2), two equivalent Mn(1), and one Si(1) atom to form distorted OLiMn2Si trigonal pyramids that share corners with two equivalent O(1)Li3MnSi trigonal bipyramids, corners with two equivalent O(2)Li2MnSi trigonal pyramids, corners with two equivalent O(4)LiMn2Si trigonal pyramids, corners with four equivalent O(3)Li2MnSi trigonal pyramids,  an edgeedge with one O(1)Li3MnSi trigonal bipyramid, and  an edgeedge with one O(2)Li2MnSi trigonal pyramid. is represented by the CIF file [CIF]
data_Li2MnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.468
_cell_length_b   5.984
_cell_length_c   11.061
_cell_angle_alpha   82.706
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   358.984
_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  0.322  0.043  0.832  1.0
  Li  Li1  1  0.178  0.043  0.332  1.0
  Li  Li2  1  0.180  0.226  0.573  1.0
  Li  Li3  1  0.320  0.226  0.073  1.0
  Li  Li4  1  0.680  0.774  0.927  1.0
  Li  Li5  1  0.820  0.774  0.427  1.0
  Li  Li6  1  0.822  0.957  0.668  1.0
  Li  Li7  1  0.678  0.957  0.168  1.0
  Mn  Mn8  1  0.179  0.575  0.832  1.0
  Mn  Mn9  1  0.679  0.425  0.668  1.0
  Mn  Mn10  1  0.321  0.575  0.332  1.0
  Mn  Mn11  1  0.821  0.425  0.168  1.0
  Si  Si12  1  0.818  0.257  0.911  1.0
  Si  Si13  1  0.682  0.257  0.411  1.0
  Si  Si14  1  0.318  0.743  0.589  1.0
  Si  Si15  1  0.182  0.743  0.089  1.0
  O  O16  1  0.695  0.091  0.820  1.0
  O  O17  1  0.805  0.091  0.320  1.0
  O  O18  1  0.117  0.237  0.925  1.0
  O  O19  1  0.383  0.237  0.425  1.0
  O  O20  1  0.825  0.239  0.543  1.0
  O  O21  1  0.286  0.478  0.663  1.0
  O  O22  1  0.675  0.239  0.043  1.0
  O  O23  1  0.214  0.478  0.163  1.0
  O  O24  1  0.786  0.522  0.837  1.0
  O  O25  1  0.325  0.761  0.957  1.0
  O  O26  1  0.714  0.522  0.337  1.0
  O  O27  1  0.175  0.761  0.457  1.0
  O  O28  1  0.617  0.763  0.575  1.0
  O  O29  1  0.883  0.763  0.075  1.0
  O  O30  1  0.195  0.909  0.680  1.0
  O  O31  1  0.305  0.909  0.180  1.0
[/CIF]
.