The compound described by Li4Mn2Si3O10 crystallizes in the monoclinic C2/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(5), and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra, corners with three equivalent Mn(1)O5 trigonal bipyramids,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(5) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Si(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. There are two 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 Si(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Mn(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(2), one Mn(1), and one Si(2) atom to form distorted OLi2MnSi trigonal pyramids that share  a cornercorner with one O(3)Li2MnSi tetrahedra, corners with two equivalent O(5)LiMn2Si tetrahedra, corners with three equivalent O(1)Li2MnSi trigonal pyramids, and  an edgeedge with one O(3)Li2MnSi tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Mn(1), and one Si(1) atom. 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 tetrahedra that share corners with four equivalent O(5)LiMn2Si tetrahedra,  a cornercorner with one O(1)Li2MnSi trigonal pyramid, and  an edgeedge with one O(1)Li2MnSi trigonal pyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form distorted OLiMn2Si tetrahedra that share corners with four equivalent O(3)Li2MnSi tetrahedra, corners with two equivalent O(1)Li2MnSi trigonal pyramids, and  an edgeedge with one O(5)LiMn2Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Mn2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.400
_cell_length_b   5.400
_cell_length_c   17.209
_cell_angle_alpha   81.457
_cell_angle_beta   81.457
_cell_angle_gamma   60.818
_symmetry_Int_Tables_number   1
_cell_volume   431.640
_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  0.831  0.677  0.947  1.0
  Li  Li1  1  0.579  0.790  0.771  1.0
  Li  Li2  1  0.677  0.831  0.447  1.0
  Li  Li3  1  0.790  0.579  0.271  1.0
  Li  Li4  1  0.210  0.421  0.729  1.0
  Li  Li5  1  0.323  0.169  0.553  1.0
  Li  Li6  1  0.421  0.210  0.229  1.0
  Li  Li7  1  0.169  0.323  0.053  1.0
  Mn  Mn8  1  0.197  0.014  0.916  1.0
  Mn  Mn9  1  0.014  0.197  0.416  1.0
  Mn  Mn10  1  0.986  0.803  0.584  1.0
  Mn  Mn11  1  0.803  0.986  0.084  1.0
  Si  Si12  1  0.659  0.464  0.599  1.0
  Si  Si13  1  0.884  0.116  0.750  1.0
  Si  Si14  1  0.536  0.341  0.901  1.0
  Si  Si15  1  0.464  0.659  0.099  1.0
  Si  Si16  1  0.116  0.884  0.250  1.0
  Si  Si17  1  0.341  0.536  0.401  1.0
  O  O18  1  0.919  0.840  0.713  1.0
  O  O19  1  0.840  0.919  0.213  1.0
  O  O20  1  0.611  0.781  0.565  1.0
  O  O21  1  0.571  0.629  0.889  1.0
  O  O22  1  0.780  0.411  0.688  1.0
  O  O23  1  0.781  0.076  0.952  1.0
  O  O24  1  0.924  0.219  0.548  1.0
  O  O25  1  0.781  0.611  0.065  1.0
  O  O26  1  0.629  0.571  0.389  1.0
  O  O27  1  0.589  0.220  0.812  1.0
  O  O28  1  0.411  0.780  0.188  1.0
  O  O29  1  0.371  0.429  0.611  1.0
  O  O30  1  0.219  0.389  0.935  1.0
  O  O31  1  0.076  0.781  0.452  1.0
  O  O32  1  0.219  0.924  0.048  1.0
  O  O33  1  0.220  0.589  0.312  1.0
  O  O34  1  0.429  0.371  0.111  1.0
  O  O35  1  0.389  0.219  0.435  1.0
  O  O36  1  0.160  0.081  0.787  1.0
  O  O37  1  0.081  0.160  0.287  1.0
[/CIF]
.
The compound described by Li4Mn2Si3O10 crystallizes in the monoclinic C2/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(5), and two equivalent O(2) atoms to form LiO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra, corners with three equivalent Mn(1)O5 trigonal bipyramids,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(5) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Si(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra,  an edgeedge with one Li(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. There are two 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 Si(2)O4 tetrahedra, corners with four equivalent Li(1)O4 tetrahedra, and corners with four equivalent Mn(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(2), one Mn(1), and one Si(2) atom to form distorted OLi2MnSi trigonal pyramids that share  a cornercorner with one O(3)Li2MnSi tetrahedra, corners with two equivalent O(5)LiMn2Si tetrahedra, corners with three equivalent O(1)Li2MnSi trigonal pyramids, and  an edgeedge with one O(3)Li2MnSi tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Mn(1), and one Si(1) atom. 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 tetrahedra that share corners with four equivalent O(5)LiMn2Si tetrahedra,  a cornercorner with one O(1)Li2MnSi trigonal pyramid, and  an edgeedge with one O(1)Li2MnSi trigonal pyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), two equivalent Mn(1), and one Si(1) atom to form distorted OLiMn2Si tetrahedra that share corners with four equivalent O(3)Li2MnSi tetrahedra, corners with two equivalent O(1)Li2MnSi trigonal pyramids, and  an edgeedge with one O(5)LiMn2Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li4Mn2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.400
_cell_length_b   5.400
_cell_length_c   17.209
_cell_angle_alpha   81.457
_cell_angle_beta   81.457
_cell_angle_gamma   60.818
_symmetry_Int_Tables_number   1
_cell_volume   431.640
_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  0.831  0.677  0.947  1.0
  Li  Li1  1  0.579  0.790  0.771  1.0
  Li  Li2  1  0.677  0.831  0.447  1.0
  Li  Li3  1  0.790  0.579  0.271  1.0
  Li  Li4  1  0.210  0.421  0.729  1.0
  Li  Li5  1  0.323  0.169  0.553  1.0
  Li  Li6  1  0.421  0.210  0.229  1.0
  Li  Li7  1  0.169  0.323  0.053  1.0
  Mn  Mn8  1  0.197  0.014  0.916  1.0
  Mn  Mn9  1  0.014  0.197  0.416  1.0
  Mn  Mn10  1  0.986  0.803  0.584  1.0
  Mn  Mn11  1  0.803  0.986  0.084  1.0
  Si  Si12  1  0.659  0.464  0.599  1.0
  Si  Si13  1  0.884  0.116  0.750  1.0
  Si  Si14  1  0.536  0.341  0.901  1.0
  Si  Si15  1  0.464  0.659  0.099  1.0
  Si  Si16  1  0.116  0.884  0.250  1.0
  Si  Si17  1  0.341  0.536  0.401  1.0
  O  O18  1  0.919  0.840  0.713  1.0
  O  O19  1  0.840  0.919  0.213  1.0
  O  O20  1  0.611  0.781  0.565  1.0
  O  O21  1  0.571  0.629  0.889  1.0
  O  O22  1  0.780  0.411  0.688  1.0
  O  O23  1  0.781  0.076  0.952  1.0
  O  O24  1  0.924  0.219  0.548  1.0
  O  O25  1  0.781  0.611  0.065  1.0
  O  O26  1  0.629  0.571  0.389  1.0
  O  O27  1  0.589  0.220  0.812  1.0
  O  O28  1  0.411  0.780  0.188  1.0
  O  O29  1  0.371  0.429  0.611  1.0
  O  O30  1  0.219  0.389  0.935  1.0
  O  O31  1  0.076  0.781  0.452  1.0
  O  O32  1  0.219  0.924  0.048  1.0
  O  O33  1  0.220  0.589  0.312  1.0
  O  O34  1  0.429  0.371  0.111  1.0
  O  O35  1  0.389  0.219  0.435  1.0
  O  O36  1  0.160  0.081  0.787  1.0
  O  O37  1  0.081  0.160  0.287  1.0
[/CIF]
.