The structure described by Li2MnP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(13), one O(15), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(6)O4 trigonal pyramids. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(6), and one O(8) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(5)O4 trigonal pyramids. In the third Li site, Li(3) is bonded to one O(10), one O(12), one O(17), and one O(19) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(8)O4 trigonal pyramids. In the fourth Li site, Li(4) is bonded to one O(11), one O(18), one O(20), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(7)O4 trigonal pyramids. In the fifth Li site, Li(5) is bonded to one O(21), one O(23), one O(6), and one O(8) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(2)O4 trigonal pyramids. In the sixth Li site, Li(6) is bonded to one O(22), one O(24), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. In the seventh Li site, Li(7) is bonded to one O(11), one O(25), one O(27), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(4)O4 trigonal pyramids. In the eighth Li site, Li(8) is bonded to one O(10), one O(12), one O(26), and one O(28) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to one O(14), one O(16), one O(26), and one O(28) atom. In the second Mn site, Mn(2) is bonded in a square co-planar geometry to one O(18), one O(20), one O(22), and one O(24) atom. In the third Mn site, Mn(3) is bonded in a square co-planar geometry to one O(13), one O(15), one O(25), and one O(27) atom. In the fourth Mn site, Mn(4) is bonded in a square co-planar geometry to one O(17), one O(19), one O(21), and one O(23) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(17), one O(28), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the second P site, P(2) is bonded to one O(18), one O(2), one O(27), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the third P site, P(3) is bonded to one O(19), one O(26), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(20), one O(25), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the fifth P site, P(5) is bonded to one O(1), one O(11), one O(14), and one O(21) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the sixth P site, P(6) is bonded to one O(12), one O(13), one O(2), and one O(22) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the seventh P site, P(7) is bonded to one O(16), one O(23), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the eighth P site, P(8) is bonded to one O(10), one O(15), one O(24), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(2) and one P(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(3) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(4) and one P(8) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(6), and one P(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one P(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(6), and one P(1) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one P(2) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(7), and one P(7) atom. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(8), and one P(8) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(7), and one P(5) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(8), and one P(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(3), and one P(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(3), and one P(8) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(7) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(4), and one P(1) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Li(4), one Mn(2), and one P(2) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(4), and one P(3) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Li(4), one Mn(2), and one P(4) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Li(5), one Mn(4), and one P(5) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Li(6), one Mn(2), and one P(6) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Li(5), one Mn(4), and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Li(6), one Mn(2), and one P(8) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Li(7), one Mn(3), and one P(4) atom. In the twenty-sixth O site, O(26) is bonded in a distorted trigonal planar geometry to one Li(8), one Mn(1), and one P(3) atom. In the twenty-seventh O site, O(27) is bonded in a distorted trigonal planar geometry to one Li(7), one Mn(3), and one P(2) atom. In the twenty-eighth O site, O(28) is bonded in a distorted trigonal planar geometry to one Li(8), one Mn(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Li2MnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.816
_cell_length_b   7.252
_cell_length_c   8.216
_cell_angle_alpha   116.187
_cell_angle_beta   114.504
_cell_angle_gamma   90.005
_symmetry_Int_Tables_number   1
_cell_volume   323.181
_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  0.765  0.765  0.530  1.0
  Li  Li1  1  0.235  0.736  0.470  1.0
  Li  Li2  1  0.765  0.265  0.529  1.0
  Li  Li3  1  0.236  0.236  0.471  1.0
  Mn  Mn4  1  0.002  0.998  0.000  1.0
  Mn  Mn5  1  0.999  0.499  1.000  1.0
  O  O6  1  0.574  0.750  1.000  1.0
  O  O7  1  0.425  0.250  1.000  1.0
  O  O8  1  0.673  0.443  0.383  1.0
  O  O9  1  0.710  0.942  0.383  1.0
  O  O10  1  0.289  0.058  0.616  1.0
  O  O11  1  0.327  0.559  0.616  1.0
  O  O12  1  0.694  0.809  0.768  1.0
  O  O13  1  0.074  0.958  0.767  1.0
  O  O14  1  0.926  0.691  0.233  1.0
  O  O15  1  0.306  0.542  0.233  1.0
  O  O16  1  0.693  0.458  0.767  1.0
  O  O17  1  0.073  0.308  0.767  1.0
  O  O18  1  0.307  0.192  0.234  1.0
  O  O19  1  0.927  0.041  0.233  1.0
  P  P20  1  0.792  0.862  0.224  1.0
  P  P21  1  0.432  0.363  0.225  1.0
  P  P22  1  0.568  0.638  0.776  1.0
  P  P23  1  0.208  0.138  0.776  1.0
[/CIF]
.
The structure described by Li2MnP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(13), one O(15), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(6)O4 trigonal pyramids. In the second Li site, Li(2) is bonded to one O(14), one O(16), one O(6), and one O(8) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(5)O4 trigonal pyramids. In the third Li site, Li(3) is bonded to one O(10), one O(12), one O(17), and one O(19) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(8)O4 trigonal pyramids. In the fourth Li site, Li(4) is bonded to one O(11), one O(18), one O(20), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(7)O4 trigonal pyramids. In the fifth Li site, Li(5) is bonded to one O(21), one O(23), one O(6), and one O(8) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(2)O4 trigonal pyramids. In the sixth Li site, Li(6) is bonded to one O(22), one O(24), one O(5), and one O(7) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. In the seventh Li site, Li(7) is bonded to one O(11), one O(25), one O(27), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent Li(4)O4 trigonal pyramids. In the eighth Li site, Li(8) is bonded to one O(10), one O(12), one O(26), and one O(28) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to one O(14), one O(16), one O(26), and one O(28) atom. In the second Mn site, Mn(2) is bonded in a square co-planar geometry to one O(18), one O(20), one O(22), and one O(24) atom. In the third Mn site, Mn(3) is bonded in a square co-planar geometry to one O(13), one O(15), one O(25), and one O(27) atom. In the fourth Mn site, Mn(4) is bonded in a square co-planar geometry to one O(17), one O(19), one O(21), and one O(23) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(17), one O(28), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the second P site, P(2) is bonded to one O(18), one O(2), one O(27), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the third P site, P(3) is bonded to one O(19), one O(26), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the fourth P site, P(4) is bonded to one O(20), one O(25), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the fifth P site, P(5) is bonded to one O(1), one O(11), one O(14), and one O(21) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the sixth P site, P(6) is bonded to one O(12), one O(13), one O(2), and one O(22) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. In the seventh P site, P(7) is bonded to one O(16), one O(23), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Li(2)O4 trigonal pyramid,  a cornercorner with one Li(4)O4 trigonal pyramid,  a cornercorner with one Li(5)O4 trigonal pyramid, and  a cornercorner with one Li(7)O4 trigonal pyramid. In the eighth P site, P(8) is bonded to one O(10), one O(15), one O(24), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  a cornercorner with one Li(3)O4 trigonal pyramid,  a cornercorner with one Li(6)O4 trigonal pyramid, and  a cornercorner with one Li(8)O4 trigonal pyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(2) and one P(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(3) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(4) and one P(8) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(6), and one P(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one P(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(6), and one P(1) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one P(2) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(7), and one P(7) atom. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(8), and one P(8) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Li(4), one Li(7), and one P(5) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one Li(3), one Li(8), and one P(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(3), and one P(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(3), and one P(8) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(7) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(4), and one P(1) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Li(4), one Mn(2), and one P(2) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Li(3), one Mn(4), and one P(3) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Li(4), one Mn(2), and one P(4) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Li(5), one Mn(4), and one P(5) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Li(6), one Mn(2), and one P(6) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Li(5), one Mn(4), and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Li(6), one Mn(2), and one P(8) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Li(7), one Mn(3), and one P(4) atom. In the twenty-sixth O site, O(26) is bonded in a distorted trigonal planar geometry to one Li(8), one Mn(1), and one P(3) atom. In the twenty-seventh O site, O(27) is bonded in a distorted trigonal planar geometry to one Li(7), one Mn(3), and one P(2) atom. In the twenty-eighth O site, O(28) is bonded in a distorted trigonal planar geometry to one Li(8), one Mn(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Li2MnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.816
_cell_length_b   7.252
_cell_length_c   8.216
_cell_angle_alpha   116.187
_cell_angle_beta   114.504
_cell_angle_gamma   90.005
_symmetry_Int_Tables_number   1
_cell_volume   323.181
_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  0.765  0.765  0.530  1.0
  Li  Li1  1  0.235  0.736  0.470  1.0
  Li  Li2  1  0.765  0.265  0.529  1.0
  Li  Li3  1  0.236  0.236  0.471  1.0
  Mn  Mn4  1  0.002  0.998  0.000  1.0
  Mn  Mn5  1  0.999  0.499  1.000  1.0
  O  O6  1  0.574  0.750  1.000  1.0
  O  O7  1  0.425  0.250  1.000  1.0
  O  O8  1  0.673  0.443  0.383  1.0
  O  O9  1  0.710  0.942  0.383  1.0
  O  O10  1  0.289  0.058  0.616  1.0
  O  O11  1  0.327  0.559  0.616  1.0
  O  O12  1  0.694  0.809  0.768  1.0
  O  O13  1  0.074  0.958  0.767  1.0
  O  O14  1  0.926  0.691  0.233  1.0
  O  O15  1  0.306  0.542  0.233  1.0
  O  O16  1  0.693  0.458  0.767  1.0
  O  O17  1  0.073  0.308  0.767  1.0
  O  O18  1  0.307  0.192  0.234  1.0
  O  O19  1  0.927  0.041  0.233  1.0
  P  P20  1  0.792  0.862  0.224  1.0
  P  P21  1  0.432  0.363  0.225  1.0
  P  P22  1  0.568  0.638  0.776  1.0
  P  P23  1  0.208  0.138  0.776  1.0
[/CIF]
.