The crystal structure described by LiMnP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form LiO5 square pyramids that share corners with two equivalent Li(1)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one Li(1)O5 square pyramid, corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 square pyramid. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Mn(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with four equivalent Li(1)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Mn(1)O5 trigonal bipyramids. 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 two equivalent Li(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(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 P(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiMnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.040
_cell_length_b   5.140
_cell_length_c   14.066
_cell_angle_alpha   70.569
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   548.107
_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  0.786  0.035  0.737  1.0
  Li  Li1  1  0.286  0.965  0.763  1.0
  Li  Li2  1  0.714  0.035  0.237  1.0
  Li  Li3  1  0.214  0.965  0.263  1.0
  Mn  Mn4  1  0.352  0.340  0.381  1.0
  Mn  Mn5  1  0.648  0.660  0.619  1.0
  Mn  Mn6  1  0.148  0.340  0.881  1.0
  Mn  Mn7  1  0.852  0.660  0.119  1.0
  P  P8  1  0.705  0.316  0.481  1.0
  P  P9  1  0.033  0.579  0.676  1.0
  P  P10  1  0.533  0.421  0.824  1.0
  P  P11  1  0.295  0.684  0.519  1.0
  P  P12  1  0.967  0.421  0.324  1.0
  P  P13  1  0.467  0.579  0.176  1.0
  P  P14  1  0.795  0.316  0.981  1.0
  P  P15  1  0.205  0.684  0.019  1.0
  O  O16  1  0.409  0.730  0.601  1.0
  O  O17  1  0.536  0.188  0.781  1.0
  O  O18  1  0.142  0.529  0.339  1.0
  O  O19  1  0.591  0.270  0.399  1.0
  O  O20  1  0.294  0.916  0.419  1.0
  O  O21  1  0.464  0.812  0.219  1.0
  O  O22  1  0.134  0.326  0.742  1.0
  O  O23  1  0.829  0.602  0.991  1.0
  O  O24  1  0.109  0.674  0.563  1.0
  O  O25  1  0.329  0.398  0.509  1.0
  O  O26  1  0.634  0.674  0.758  1.0
  O  O27  1  0.671  0.602  0.491  1.0
  O  O28  1  0.206  0.916  0.919  1.0
  O  O29  1  0.909  0.270  0.899  1.0
  O  O30  1  0.366  0.326  0.242  1.0
  O  O31  1  0.171  0.398  0.009  1.0
  O  O32  1  0.891  0.326  0.437  1.0
  O  O33  1  0.642  0.471  0.161  1.0
  O  O34  1  0.794  0.084  0.081  1.0
  O  O35  1  0.391  0.674  0.063  1.0
  O  O36  1  0.609  0.326  0.937  1.0
  O  O37  1  0.866  0.674  0.258  1.0
  O  O38  1  0.964  0.188  0.281  1.0
  O  O39  1  0.858  0.471  0.661  1.0
  O  O40  1  0.358  0.529  0.839  1.0
  O  O41  1  0.036  0.812  0.719  1.0
  O  O42  1  0.706  0.084  0.581  1.0
  O  O43  1  0.091  0.730  0.101  1.0
[/CIF]
.
The crystal structure described by LiMnP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form LiO5 square pyramids that share corners with two equivalent Li(1)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form distorted MnO5 trigonal bipyramids that share  a cornercorner with one Li(1)O5 square pyramid, corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 square pyramid. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(1)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Mn(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with four equivalent Li(1)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Mn(1)O5 trigonal bipyramids. 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 two equivalent Li(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(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 P(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiMnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.040
_cell_length_b   5.140
_cell_length_c   14.066
_cell_angle_alpha   70.569
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   548.107
_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  0.786  0.035  0.737  1.0
  Li  Li1  1  0.286  0.965  0.763  1.0
  Li  Li2  1  0.714  0.035  0.237  1.0
  Li  Li3  1  0.214  0.965  0.263  1.0
  Mn  Mn4  1  0.352  0.340  0.381  1.0
  Mn  Mn5  1  0.648  0.660  0.619  1.0
  Mn  Mn6  1  0.148  0.340  0.881  1.0
  Mn  Mn7  1  0.852  0.660  0.119  1.0
  P  P8  1  0.705  0.316  0.481  1.0
  P  P9  1  0.033  0.579  0.676  1.0
  P  P10  1  0.533  0.421  0.824  1.0
  P  P11  1  0.295  0.684  0.519  1.0
  P  P12  1  0.967  0.421  0.324  1.0
  P  P13  1  0.467  0.579  0.176  1.0
  P  P14  1  0.795  0.316  0.981  1.0
  P  P15  1  0.205  0.684  0.019  1.0
  O  O16  1  0.409  0.730  0.601  1.0
  O  O17  1  0.536  0.188  0.781  1.0
  O  O18  1  0.142  0.529  0.339  1.0
  O  O19  1  0.591  0.270  0.399  1.0
  O  O20  1  0.294  0.916  0.419  1.0
  O  O21  1  0.464  0.812  0.219  1.0
  O  O22  1  0.134  0.326  0.742  1.0
  O  O23  1  0.829  0.602  0.991  1.0
  O  O24  1  0.109  0.674  0.563  1.0
  O  O25  1  0.329  0.398  0.509  1.0
  O  O26  1  0.634  0.674  0.758  1.0
  O  O27  1  0.671  0.602  0.491  1.0
  O  O28  1  0.206  0.916  0.919  1.0
  O  O29  1  0.909  0.270  0.899  1.0
  O  O30  1  0.366  0.326  0.242  1.0
  O  O31  1  0.171  0.398  0.009  1.0
  O  O32  1  0.891  0.326  0.437  1.0
  O  O33  1  0.642  0.471  0.161  1.0
  O  O34  1  0.794  0.084  0.081  1.0
  O  O35  1  0.391  0.674  0.063  1.0
  O  O36  1  0.609  0.326  0.937  1.0
  O  O37  1  0.866  0.674  0.258  1.0
  O  O38  1  0.964  0.188  0.281  1.0
  O  O39  1  0.858  0.471  0.661  1.0
  O  O40  1  0.358  0.529  0.839  1.0
  O  O41  1  0.036  0.812  0.719  1.0
  O  O42  1  0.706  0.084  0.581  1.0
  O  O43  1  0.091  0.730  0.101  1.0
[/CIF]
.