The structure described by LiMnP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 68°. Mn(1) is bonded to one O(1), one O(2), one O(5), one O(7), and two equivalent O(6) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 39°. 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 two equivalent Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 42-53°. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-56°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Li(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_LiMnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.408
_cell_length_b   6.658
_cell_length_c   7.949
_cell_angle_alpha   60.901
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   527.506
_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  0.089  0.735  0.739  1.0
  Li  Li1  1  0.411  0.735  0.239  1.0
  Li  Li2  1  0.589  0.265  0.761  1.0
  Li  Li3  1  0.911  0.265  0.261  1.0
  Mn  Mn4  1  0.709  0.551  0.901  1.0
  Mn  Mn5  1  0.791  0.551  0.401  1.0
  Mn  Mn6  1  0.209  0.449  0.599  1.0
  Mn  Mn7  1  0.291  0.449  0.099  1.0
  P  P8  1  0.351  0.988  0.790  1.0
  P  P9  1  0.149  0.988  0.290  1.0
  P  P10  1  0.413  0.631  0.690  1.0
  P  P11  1  0.087  0.631  0.190  1.0
  P  P12  1  0.913  0.369  0.810  1.0
  P  P13  1  0.587  0.369  0.310  1.0
  P  P14  1  0.851  0.012  0.710  1.0
  P  P15  1  0.649  0.012  0.210  1.0
  O  O16  1  0.234  0.120  0.711  1.0
  O  O17  1  0.334  0.773  0.992  1.0
  O  O18  1  0.947  0.868  0.703  1.0
  O  O19  1  0.384  0.891  0.643  1.0
  O  O20  1  0.266  0.120  0.211  1.0
  O  O21  1  0.166  0.773  0.492  1.0
  O  O22  1  0.117  0.608  0.014  1.0
  O  O23  1  0.553  0.868  0.203  1.0
  O  O24  1  0.116  0.891  0.143  1.0
  O  O25  1  0.313  0.482  0.836  1.0
  O  O26  1  0.383  0.608  0.514  1.0
  O  O27  1  0.538  0.576  0.763  1.0
  O  O28  1  0.038  0.424  0.737  1.0
  O  O29  1  0.813  0.518  0.664  1.0
  O  O30  1  0.187  0.482  0.336  1.0
  O  O31  1  0.962  0.576  0.263  1.0
  O  O32  1  0.462  0.424  0.237  1.0
  O  O33  1  0.617  0.392  0.486  1.0
  O  O34  1  0.687  0.518  0.164  1.0
  O  O35  1  0.884  0.109  0.857  1.0
  O  O36  1  0.447  0.132  0.797  1.0
  O  O37  1  0.883  0.392  0.986  1.0
  O  O38  1  0.834  0.227  0.508  1.0
  O  O39  1  0.734  0.880  0.789  1.0
  O  O40  1  0.616  0.109  0.357  1.0
  O  O41  1  0.053  0.132  0.297  1.0
  O  O42  1  0.666  0.227  0.008  1.0
  O  O43  1  0.766  0.880  0.289  1.0
[/CIF]
.
The structure described by LiMnP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 68°. Mn(1) is bonded to one O(1), one O(2), one O(5), one O(7), and two equivalent O(6) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 39°. 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 two equivalent Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 42-53°. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(1)O4 trigonal pyramids, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-56°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Li(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_LiMnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.408
_cell_length_b   6.658
_cell_length_c   7.949
_cell_angle_alpha   60.901
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   527.506
_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  0.089  0.735  0.739  1.0
  Li  Li1  1  0.411  0.735  0.239  1.0
  Li  Li2  1  0.589  0.265  0.761  1.0
  Li  Li3  1  0.911  0.265  0.261  1.0
  Mn  Mn4  1  0.709  0.551  0.901  1.0
  Mn  Mn5  1  0.791  0.551  0.401  1.0
  Mn  Mn6  1  0.209  0.449  0.599  1.0
  Mn  Mn7  1  0.291  0.449  0.099  1.0
  P  P8  1  0.351  0.988  0.790  1.0
  P  P9  1  0.149  0.988  0.290  1.0
  P  P10  1  0.413  0.631  0.690  1.0
  P  P11  1  0.087  0.631  0.190  1.0
  P  P12  1  0.913  0.369  0.810  1.0
  P  P13  1  0.587  0.369  0.310  1.0
  P  P14  1  0.851  0.012  0.710  1.0
  P  P15  1  0.649  0.012  0.210  1.0
  O  O16  1  0.234  0.120  0.711  1.0
  O  O17  1  0.334  0.773  0.992  1.0
  O  O18  1  0.947  0.868  0.703  1.0
  O  O19  1  0.384  0.891  0.643  1.0
  O  O20  1  0.266  0.120  0.211  1.0
  O  O21  1  0.166  0.773  0.492  1.0
  O  O22  1  0.117  0.608  0.014  1.0
  O  O23  1  0.553  0.868  0.203  1.0
  O  O24  1  0.116  0.891  0.143  1.0
  O  O25  1  0.313  0.482  0.836  1.0
  O  O26  1  0.383  0.608  0.514  1.0
  O  O27  1  0.538  0.576  0.763  1.0
  O  O28  1  0.038  0.424  0.737  1.0
  O  O29  1  0.813  0.518  0.664  1.0
  O  O30  1  0.187  0.482  0.336  1.0
  O  O31  1  0.962  0.576  0.263  1.0
  O  O32  1  0.462  0.424  0.237  1.0
  O  O33  1  0.617  0.392  0.486  1.0
  O  O34  1  0.687  0.518  0.164  1.0
  O  O35  1  0.884  0.109  0.857  1.0
  O  O36  1  0.447  0.132  0.797  1.0
  O  O37  1  0.883  0.392  0.986  1.0
  O  O38  1  0.834  0.227  0.508  1.0
  O  O39  1  0.734  0.880  0.789  1.0
  O  O40  1  0.616  0.109  0.357  1.0
  O  O41  1  0.053  0.132  0.297  1.0
  O  O42  1  0.666  0.227  0.008  1.0
  O  O43  1  0.766  0.880  0.289  1.0
[/CIF]
.