The crystal structure described by Li2MnSi3O8 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second Li site, Li(2) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. Mn(1) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Mn(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Si(2), and one Si(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(3) atom. 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 3-coordinate geometry to one Li(1), one Mn(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to one Li(1), one Li(2), one Mn(1), and one Si(3) atom. is represented by the CIF card [CIF]
data_Li2MnSi3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.624
_cell_length_b   6.362
_cell_length_c   6.712
_cell_angle_alpha   74.697
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   355.180
_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  0.679  0.846  0.778  1.0
  Li  Li1  1  0.164  0.581  0.505  1.0
  Li  Li2  1  0.664  0.419  0.495  1.0
  Li  Li3  1  0.179  0.154  0.222  1.0
  Mn  Mn4  1  0.002  0.046  0.599  1.0
  Mn  Mn5  1  0.502  0.954  0.401  1.0
  Si  Si6  1  0.493  0.419  0.990  1.0
  Si  Si7  1  0.807  0.248  0.897  1.0
  Si  Si8  1  0.337  0.159  0.733  1.0
  Si  Si9  1  0.837  0.841  0.267  1.0
  Si  Si10  1  0.307  0.752  0.103  1.0
  Si  Si11  1  0.993  0.581  0.010  1.0
  O  O12  1  0.259  0.990  0.947  1.0
  O  O13  1  0.966  0.329  0.993  1.0
  O  O14  1  0.671  0.432  0.895  1.0
  O  O15  1  0.969  0.748  0.792  1.0
  O  O16  1  0.376  0.385  0.806  1.0
  O  O17  1  0.823  0.232  0.662  1.0
  O  O18  1  0.496  0.060  0.667  1.0
  O  O19  1  0.203  0.229  0.556  1.0
  O  O20  1  0.703  0.771  0.444  1.0
  O  O21  1  0.996  0.940  0.333  1.0
  O  O22  1  0.323  0.768  0.338  1.0
  O  O23  1  0.876  0.616  0.194  1.0
  O  O24  1  0.469  0.252  0.208  1.0
  O  O25  1  0.171  0.568  0.105  1.0
  O  O26  1  0.466  0.671  0.007  1.0
  O  O27  1  0.759  0.010  0.053  1.0
[/CIF]
.
The crystal structure described by Li2MnSi3O8 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second Li site, Li(2) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. Mn(1) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Mn(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Si(2), and one Si(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(3) atom. 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 3-coordinate geometry to one Li(1), one Mn(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to one Li(1), one Li(2), one Mn(1), and one Si(3) atom. is represented by the CIF card [CIF]
data_Li2MnSi3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.624
_cell_length_b   6.362
_cell_length_c   6.712
_cell_angle_alpha   74.697
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   355.180
_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  0.679  0.846  0.778  1.0
  Li  Li1  1  0.164  0.581  0.505  1.0
  Li  Li2  1  0.664  0.419  0.495  1.0
  Li  Li3  1  0.179  0.154  0.222  1.0
  Mn  Mn4  1  0.002  0.046  0.599  1.0
  Mn  Mn5  1  0.502  0.954  0.401  1.0
  Si  Si6  1  0.493  0.419  0.990  1.0
  Si  Si7  1  0.807  0.248  0.897  1.0
  Si  Si8  1  0.337  0.159  0.733  1.0
  Si  Si9  1  0.837  0.841  0.267  1.0
  Si  Si10  1  0.307  0.752  0.103  1.0
  Si  Si11  1  0.993  0.581  0.010  1.0
  O  O12  1  0.259  0.990  0.947  1.0
  O  O13  1  0.966  0.329  0.993  1.0
  O  O14  1  0.671  0.432  0.895  1.0
  O  O15  1  0.969  0.748  0.792  1.0
  O  O16  1  0.376  0.385  0.806  1.0
  O  O17  1  0.823  0.232  0.662  1.0
  O  O18  1  0.496  0.060  0.667  1.0
  O  O19  1  0.203  0.229  0.556  1.0
  O  O20  1  0.703  0.771  0.444  1.0
  O  O21  1  0.996  0.940  0.333  1.0
  O  O22  1  0.323  0.768  0.338  1.0
  O  O23  1  0.876  0.616  0.194  1.0
  O  O24  1  0.469  0.252  0.208  1.0
  O  O25  1  0.171  0.568  0.105  1.0
  O  O26  1  0.466  0.671  0.007  1.0
  O  O27  1  0.759  0.010  0.053  1.0
[/CIF]
.