The material described by Li3Mn2(SiO4)2 is Clathrate-derived structured and crystallizes in the monoclinic P2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), one O(5), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form MnO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form MnO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. 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 corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, and corners with two equivalent Mn(2)O4 tetrahedra. 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 corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, and corners with two equivalent Mn(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Mn(2), and one Si(1) atom to form distorted corner-sharing OLi2MnSi tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Mn(1), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Mn(2), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Li(2), one Li(3), one Mn(2), and one Si(2) atom to form distorted corner-sharing OLi2MnSi tetrahedra. is represented by the CIF file [CIF]
data_Li3Mn2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.808
_cell_length_b   5.276
_cell_length_c   6.329
_cell_angle_alpha   89.047
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   360.853
_cell_formula_units_Z   2
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  0.833  0.545  0.752  1.0
  Li  Li1  1  0.333  0.455  0.248  1.0
  Li  Li2  1  0.671  0.045  0.241  1.0
  Li  Li3  1  0.171  0.967  0.241  1.0
  Li  Li4  1  0.671  0.033  0.759  1.0
  Li  Li5  1  0.171  0.955  0.759  1.0
  Mn  Mn6  1  0.583  0.437  0.494  1.0
  Mn  Mn7  1  0.083  0.563  0.506  1.0
  Mn  Mn8  1  0.418  0.070  0.982  1.0
  Mn  Mn9  1  0.918  0.930  0.018  1.0
  Si  Si10  1  0.918  0.055  0.509  1.0
  Si  Si11  1  0.418  0.945  0.491  1.0
  Si  Si12  1  0.576  0.562  0.999  1.0
  Si  Si13  1  0.076  0.438  0.001  1.0
  O  O14  1  0.340  0.007  0.701  1.0
  O  O15  1  0.843  0.939  0.716  1.0
  O  O16  1  0.936  0.364  0.539  1.0
  O  O17  1  0.563  0.060  0.504  1.0
  O  O18  1  0.436  0.636  0.461  1.0
  O  O19  1  0.063  0.940  0.496  1.0
  O  O20  1  0.840  0.993  0.299  1.0
  O  O21  1  0.343  0.061  0.284  1.0
  O  O22  1  0.150  0.546  0.217  1.0
  O  O23  1  0.643  0.436  0.214  1.0
  O  O24  1  0.434  0.463  0.997  1.0
  O  O25  1  0.934  0.537  0.003  1.0
  O  O26  1  0.589  0.874  0.001  1.0
  O  O27  1  0.089  0.126  0.999  1.0
  O  O28  1  0.650  0.454  0.783  1.0
  O  O29  1  0.143  0.564  0.786  1.0
[/CIF]
.
The material described by Li3Mn2(SiO4)2 is Clathrate-derived structured and crystallizes in the monoclinic P2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), one O(5), and one O(8) atom to form LiO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form MnO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form MnO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. 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 corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, and corners with two equivalent Mn(2)O4 tetrahedra. 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 corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, and corners with two equivalent Mn(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Mn(2), and one Si(1) atom to form distorted corner-sharing OLi2MnSi tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Mn(1), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Mn(2), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Li(2), one Li(3), one Mn(2), and one Si(2) atom to form distorted corner-sharing OLi2MnSi tetrahedra. is represented by the CIF file [CIF]
data_Li3Mn2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.808
_cell_length_b   5.276
_cell_length_c   6.329
_cell_angle_alpha   89.047
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   360.853
_cell_formula_units_Z   2
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  0.833  0.545  0.752  1.0
  Li  Li1  1  0.333  0.455  0.248  1.0
  Li  Li2  1  0.671  0.045  0.241  1.0
  Li  Li3  1  0.171  0.967  0.241  1.0
  Li  Li4  1  0.671  0.033  0.759  1.0
  Li  Li5  1  0.171  0.955  0.759  1.0
  Mn  Mn6  1  0.583  0.437  0.494  1.0
  Mn  Mn7  1  0.083  0.563  0.506  1.0
  Mn  Mn8  1  0.418  0.070  0.982  1.0
  Mn  Mn9  1  0.918  0.930  0.018  1.0
  Si  Si10  1  0.918  0.055  0.509  1.0
  Si  Si11  1  0.418  0.945  0.491  1.0
  Si  Si12  1  0.576  0.562  0.999  1.0
  Si  Si13  1  0.076  0.438  0.001  1.0
  O  O14  1  0.340  0.007  0.701  1.0
  O  O15  1  0.843  0.939  0.716  1.0
  O  O16  1  0.936  0.364  0.539  1.0
  O  O17  1  0.563  0.060  0.504  1.0
  O  O18  1  0.436  0.636  0.461  1.0
  O  O19  1  0.063  0.940  0.496  1.0
  O  O20  1  0.840  0.993  0.299  1.0
  O  O21  1  0.343  0.061  0.284  1.0
  O  O22  1  0.150  0.546  0.217  1.0
  O  O23  1  0.643  0.436  0.214  1.0
  O  O24  1  0.434  0.463  0.997  1.0
  O  O25  1  0.934  0.537  0.003  1.0
  O  O26  1  0.589  0.874  0.001  1.0
  O  O27  1  0.089  0.126  0.999  1.0
  O  O28  1  0.650  0.454  0.783  1.0
  O  O29  1  0.143  0.564  0.786  1.0
[/CIF]
.