The compound described by Li3Mn2(PO4)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to two equivalent O(4) and two equivalent O(6) atoms. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(2) atoms. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to two equivalent O(5) and four equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-58°. In the second P site, P(2) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-54°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded to two equivalent Li(2), one Mn(1), and one P(1) atom to form a mixture of distorted corner and edge-sharing OLi2MnP tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Mn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), two equivalent Li(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Li(1), one Mn(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3Mn2(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.779
_cell_length_b   8.779
_cell_length_c   6.193
_cell_angle_alpha   75.003
_cell_angle_beta   75.003
_cell_angle_gamma   99.298
_symmetry_Int_Tables_number   1
_cell_volume   431.728
_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  0.698  0.302  0.250  1.0
  Li  Li1  1  0.982  0.018  0.250  1.0
  Li  Li2  1  0.500  0.500  0.500  1.0
  Li  Li3  1  0.018  0.982  0.750  1.0
  Li  Li4  1  0.302  0.698  0.750  1.0
  Li  Li5  1  0.500  0.500  0.000  1.0
  Mn  Mn6  1  0.054  0.364  0.380  1.0
  Mn  Mn7  1  0.364  0.054  0.880  1.0
  Mn  Mn8  1  0.636  0.946  0.120  1.0
  Mn  Mn9  1  0.946  0.636  0.620  1.0
  P  P10  1  0.671  0.862  0.631  1.0
  P  P11  1  0.862  0.671  0.131  1.0
  P  P12  1  0.709  0.291  0.750  1.0
  P  P13  1  0.291  0.709  0.250  1.0
  P  P14  1  0.329  0.138  0.369  1.0
  P  P15  1  0.138  0.329  0.869  1.0
  O  O16  1  0.981  0.665  0.898  1.0
  O  O17  1  0.853  0.856  0.588  1.0
  O  O18  1  0.622  0.951  0.818  1.0
  O  O19  1  0.665  0.981  0.398  1.0
  O  O20  1  0.019  0.335  0.102  1.0
  O  O21  1  0.147  0.144  0.412  1.0
  O  O22  1  0.378  0.049  0.182  1.0
  O  O23  1  0.335  0.019  0.602  1.0
  O  O24  1  0.144  0.147  0.912  1.0
  O  O25  1  0.049  0.378  0.682  1.0
  O  O26  1  0.449  0.302  0.293  1.0
  O  O27  1  0.257  0.533  0.234  1.0
  O  O28  1  0.302  0.449  0.793  1.0
  O  O29  1  0.274  0.819  0.020  1.0
  O  O30  1  0.533  0.257  0.734  1.0
  O  O31  1  0.181  0.726  0.480  1.0
  O  O32  1  0.819  0.274  0.520  1.0
  O  O33  1  0.467  0.743  0.266  1.0
  O  O34  1  0.726  0.181  0.980  1.0
  O  O35  1  0.698  0.551  0.207  1.0
  O  O36  1  0.743  0.467  0.766  1.0
  O  O37  1  0.551  0.698  0.707  1.0
  O  O38  1  0.951  0.622  0.318  1.0
  O  O39  1  0.856  0.853  0.088  1.0
[/CIF]
.
The compound described by Li3Mn2(PO4)3 crystallizes in the monoclinic C2/c space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to two equivalent O(4) and two equivalent O(6) atoms. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(2) atoms. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to two equivalent O(5) and four equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-58°. In the second P site, P(2) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-54°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded to two equivalent Li(2), one Mn(1), and one P(1) atom to form a mixture of distorted corner and edge-sharing OLi2MnP tetrahedra. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Mn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), two equivalent Li(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Li(1), one Mn(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3Mn2(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.779
_cell_length_b   8.779
_cell_length_c   6.193
_cell_angle_alpha   75.003
_cell_angle_beta   75.003
_cell_angle_gamma   99.298
_symmetry_Int_Tables_number   1
_cell_volume   431.728
_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  0.698  0.302  0.250  1.0
  Li  Li1  1  0.982  0.018  0.250  1.0
  Li  Li2  1  0.500  0.500  0.500  1.0
  Li  Li3  1  0.018  0.982  0.750  1.0
  Li  Li4  1  0.302  0.698  0.750  1.0
  Li  Li5  1  0.500  0.500  0.000  1.0
  Mn  Mn6  1  0.054  0.364  0.380  1.0
  Mn  Mn7  1  0.364  0.054  0.880  1.0
  Mn  Mn8  1  0.636  0.946  0.120  1.0
  Mn  Mn9  1  0.946  0.636  0.620  1.0
  P  P10  1  0.671  0.862  0.631  1.0
  P  P11  1  0.862  0.671  0.131  1.0
  P  P12  1  0.709  0.291  0.750  1.0
  P  P13  1  0.291  0.709  0.250  1.0
  P  P14  1  0.329  0.138  0.369  1.0
  P  P15  1  0.138  0.329  0.869  1.0
  O  O16  1  0.981  0.665  0.898  1.0
  O  O17  1  0.853  0.856  0.588  1.0
  O  O18  1  0.622  0.951  0.818  1.0
  O  O19  1  0.665  0.981  0.398  1.0
  O  O20  1  0.019  0.335  0.102  1.0
  O  O21  1  0.147  0.144  0.412  1.0
  O  O22  1  0.378  0.049  0.182  1.0
  O  O23  1  0.335  0.019  0.602  1.0
  O  O24  1  0.144  0.147  0.912  1.0
  O  O25  1  0.049  0.378  0.682  1.0
  O  O26  1  0.449  0.302  0.293  1.0
  O  O27  1  0.257  0.533  0.234  1.0
  O  O28  1  0.302  0.449  0.793  1.0
  O  O29  1  0.274  0.819  0.020  1.0
  O  O30  1  0.533  0.257  0.734  1.0
  O  O31  1  0.181  0.726  0.480  1.0
  O  O32  1  0.819  0.274  0.520  1.0
  O  O33  1  0.467  0.743  0.266  1.0
  O  O34  1  0.726  0.181  0.980  1.0
  O  O35  1  0.698  0.551  0.207  1.0
  O  O36  1  0.743  0.467  0.766  1.0
  O  O37  1  0.551  0.698  0.707  1.0
  O  O38  1  0.951  0.622  0.318  1.0
  O  O39  1  0.856  0.853  0.088  1.0
[/CIF]
.