The crystal structure described by Li1MnSiO4 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-70°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form LiO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-70°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-70°. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-70°. There are two inequivalent Si sites. In the first Si site, 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  a cornercorner with one Li(1)O6 octahedra,  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O6 octahedra,  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(2), one Mn(1), one Mn(2), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Mn(1), one Mn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(2), and one Si(2) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiMnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.027
_cell_length_b   10.044
_cell_length_c   4.811
_cell_angle_alpha   90.000
_cell_angle_beta   90.030
_cell_angle_gamma   89.997
_symmetry_Int_Tables_number   1
_cell_volume   291.260
_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  0.265  0.300  0.249  1.0
  Li  Li1  1  0.236  0.794  0.747  1.0
  Li  Li2  1  0.764  0.294  0.253  1.0
  Li  Li3  1  0.735  0.799  0.751  1.0
  Mn  Mn4  1  0.997  0.022  0.270  1.0
  Mn  Mn5  1  0.501  0.072  0.769  1.0
  Mn  Mn6  1  0.500  0.572  0.231  1.0
  Mn  Mn7  1  0.003  0.523  0.730  1.0
  Si  Si8  1  0.020  0.204  0.815  1.0
  Si  Si9  1  0.479  0.891  0.314  1.0
  Si  Si10  1  0.521  0.391  0.686  1.0
  Si  Si11  1  0.981  0.704  0.184  1.0
  O  O12  1  0.016  0.358  0.935  1.0
  O  O13  1  0.011  0.193  0.477  1.0
  O  O14  1  0.186  0.625  0.019  1.0
  O  O15  1  0.240  0.136  0.968  1.0
  O  O16  1  0.258  0.957  0.467  1.0
  O  O17  1  0.512  0.237  0.565  1.0
  O  O18  1  0.487  0.901  0.976  1.0
  O  O19  1  0.317  0.470  0.520  1.0
  O  O20  1  0.683  0.970  0.480  1.0
  O  O21  1  0.513  0.401  0.024  1.0
  O  O22  1  0.488  0.737  0.435  1.0
  O  O23  1  0.742  0.457  0.533  1.0
  O  O24  1  0.760  0.636  0.032  1.0
  O  O25  1  0.814  0.125  0.981  1.0
  O  O26  1  0.988  0.693  0.523  1.0
  O  O27  1  0.984  0.857  0.065  1.0
[/CIF]
.
The crystal structure described by Li1MnSiO4 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-70°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form LiO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-70°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-70°. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-70°. There are two inequivalent Si sites. In the first Si site, 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  a cornercorner with one Li(1)O6 octahedra,  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. In the second Si site, Si(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O6 octahedra,  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(2), one Mn(1), one Mn(2), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Mn(1), one Mn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Mn(2), and one Si(2) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Li(1), one Mn(1), one Mn(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiMnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.027
_cell_length_b   10.044
_cell_length_c   4.811
_cell_angle_alpha   90.000
_cell_angle_beta   90.030
_cell_angle_gamma   89.997
_symmetry_Int_Tables_number   1
_cell_volume   291.260
_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  0.265  0.300  0.249  1.0
  Li  Li1  1  0.236  0.794  0.747  1.0
  Li  Li2  1  0.764  0.294  0.253  1.0
  Li  Li3  1  0.735  0.799  0.751  1.0
  Mn  Mn4  1  0.997  0.022  0.270  1.0
  Mn  Mn5  1  0.501  0.072  0.769  1.0
  Mn  Mn6  1  0.500  0.572  0.231  1.0
  Mn  Mn7  1  0.003  0.523  0.730  1.0
  Si  Si8  1  0.020  0.204  0.815  1.0
  Si  Si9  1  0.479  0.891  0.314  1.0
  Si  Si10  1  0.521  0.391  0.686  1.0
  Si  Si11  1  0.981  0.704  0.184  1.0
  O  O12  1  0.016  0.358  0.935  1.0
  O  O13  1  0.011  0.193  0.477  1.0
  O  O14  1  0.186  0.625  0.019  1.0
  O  O15  1  0.240  0.136  0.968  1.0
  O  O16  1  0.258  0.957  0.467  1.0
  O  O17  1  0.512  0.237  0.565  1.0
  O  O18  1  0.487  0.901  0.976  1.0
  O  O19  1  0.317  0.470  0.520  1.0
  O  O20  1  0.683  0.970  0.480  1.0
  O  O21  1  0.513  0.401  0.024  1.0
  O  O22  1  0.488  0.737  0.435  1.0
  O  O23  1  0.742  0.457  0.533  1.0
  O  O24  1  0.760  0.636  0.032  1.0
  O  O25  1  0.814  0.125  0.981  1.0
  O  O26  1  0.988  0.693  0.523  1.0
  O  O27  1  0.984  0.857  0.065  1.0
[/CIF]
.