The crystal structure described by Li2MnSiO4 is beta beryllia-derived structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(6) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(3), and two equivalent O(7) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), and two equivalent O(8) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(4)O4 tetrahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent Li(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent Li(3)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent Li(4)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent Li(3)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(4), one Mn(2), and one Si(1) atom to form corner-sharing OLi2MnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Mn(1), and one Si(2) atom to form corner-sharing OLi2MnSi tetrahedra. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Mn(1), and one Si(2) atom to form distorted corner-sharing OLi2MnSi tetrahedra. In the fourth O site, O(4) 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 fifth O site, O(5) is bonded to two equivalent Li(4), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Li(1), one Mn(2), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the seventh O site, O(7) is bonded to two equivalent Li(2), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Li(3), one Mn(2), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. is represented by the CIF card [CIF]
data_Li2MnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.093
_cell_length_b   6.375
_cell_length_c   10.897
_cell_angle_alpha   89.998
_cell_angle_beta   90.019
_cell_angle_gamma   90.019
_symmetry_Int_Tables_number   1
_cell_volume   353.800
_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  0.181  0.000  0.588  1.0
  Li  Li1  1  0.318  0.500  0.088  1.0
  Li  Li2  1  0.181  0.498  0.588  1.0
  Li  Li3  1  0.682  0.500  0.913  1.0
  Li  Li4  1  0.819  0.502  0.413  1.0
  Li  Li5  1  0.682  0.998  0.913  1.0
  Li  Li6  1  0.819  0.999  0.413  1.0
  Li  Li7  1  0.318  0.002  0.088  1.0
  Mn  Mn8  1  0.181  0.749  0.833  1.0
  Mn  Mn9  1  0.819  0.251  0.167  1.0
  Mn  Mn10  1  0.319  0.751  0.334  1.0
  Mn  Mn11  1  0.681  0.249  0.667  1.0
  Si  Si12  1  0.825  0.751  0.161  1.0
  Si  Si13  1  0.674  0.749  0.661  1.0
  Si  Si14  1  0.326  0.251  0.339  1.0
  Si  Si15  1  0.175  0.249  0.839  1.0
  O  O16  1  0.150  0.751  0.157  1.0
  O  O17  1  0.350  0.750  0.657  1.0
  O  O18  1  0.650  0.251  0.344  1.0
  O  O19  1  0.850  0.249  0.843  1.0
  O  O20  1  0.770  0.750  0.808  1.0
  O  O21  1  0.730  0.751  0.308  1.0
  O  O22  1  0.270  0.249  0.693  1.0
  O  O23  1  0.230  0.251  0.193  1.0
  O  O24  1  0.712  0.963  0.092  1.0
  O  O25  1  0.788  0.961  0.592  1.0
  O  O26  1  0.712  0.539  0.092  1.0
  O  O27  1  0.788  0.537  0.592  1.0
  O  O28  1  0.212  0.463  0.409  1.0
  O  O29  1  0.288  0.462  0.909  1.0
  O  O30  1  0.212  0.039  0.409  1.0
  O  O31  1  0.288  0.037  0.909  1.0
[/CIF]
.
The crystal structure described by Li2MnSiO4 is beta beryllia-derived structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), and two equivalent O(6) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(3), and two equivalent O(7) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), and two equivalent O(8) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, corners with three equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(4)O4 tetrahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent Li(4)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent Li(3)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent Li(4)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent Li(3)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(4), one Mn(2), and one Si(1) atom to form corner-sharing OLi2MnSi tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Mn(1), and one Si(2) atom to form corner-sharing OLi2MnSi tetrahedra. In the third O site, O(3) is bonded to one Li(2), one Li(4), one Mn(1), and one Si(2) atom to form distorted corner-sharing OLi2MnSi tetrahedra. In the fourth O site, O(4) 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 fifth O site, O(5) is bonded to two equivalent Li(4), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Li(1), one Mn(2), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the seventh O site, O(7) is bonded to two equivalent Li(2), one Mn(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Li(3), one Mn(2), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2MnSi tetrahedra. is represented by the CIF card [CIF]
data_Li2MnSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.093
_cell_length_b   6.375
_cell_length_c   10.897
_cell_angle_alpha   89.998
_cell_angle_beta   90.019
_cell_angle_gamma   90.019
_symmetry_Int_Tables_number   1
_cell_volume   353.800
_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  0.181  0.000  0.588  1.0
  Li  Li1  1  0.318  0.500  0.088  1.0
  Li  Li2  1  0.181  0.498  0.588  1.0
  Li  Li3  1  0.682  0.500  0.913  1.0
  Li  Li4  1  0.819  0.502  0.413  1.0
  Li  Li5  1  0.682  0.998  0.913  1.0
  Li  Li6  1  0.819  0.999  0.413  1.0
  Li  Li7  1  0.318  0.002  0.088  1.0
  Mn  Mn8  1  0.181  0.749  0.833  1.0
  Mn  Mn9  1  0.819  0.251  0.167  1.0
  Mn  Mn10  1  0.319  0.751  0.334  1.0
  Mn  Mn11  1  0.681  0.249  0.667  1.0
  Si  Si12  1  0.825  0.751  0.161  1.0
  Si  Si13  1  0.674  0.749  0.661  1.0
  Si  Si14  1  0.326  0.251  0.339  1.0
  Si  Si15  1  0.175  0.249  0.839  1.0
  O  O16  1  0.150  0.751  0.157  1.0
  O  O17  1  0.350  0.750  0.657  1.0
  O  O18  1  0.650  0.251  0.344  1.0
  O  O19  1  0.850  0.249  0.843  1.0
  O  O20  1  0.770  0.750  0.808  1.0
  O  O21  1  0.730  0.751  0.308  1.0
  O  O22  1  0.270  0.249  0.693  1.0
  O  O23  1  0.230  0.251  0.193  1.0
  O  O24  1  0.712  0.963  0.092  1.0
  O  O25  1  0.788  0.961  0.592  1.0
  O  O26  1  0.712  0.539  0.092  1.0
  O  O27  1  0.788  0.537  0.592  1.0
  O  O28  1  0.212  0.463  0.409  1.0
  O  O29  1  0.288  0.462  0.909  1.0
  O  O30  1  0.212  0.039  0.409  1.0
  O  O31  1  0.288  0.037  0.909  1.0
[/CIF]
.