The material structure described by Mn2PO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 pentagonal pyramids, corners with four equivalent P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 62-83°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with four equivalent Mn(1)O6 pentagonal pyramids, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(1)O6 pentagonal pyramids, and edges with two equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 pentagonal pyramids, edges with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 61°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one P(1) atom. In the third O site, O(3) is bonded to one Mn(1), two equivalent Mn(2), and one P(1) atom to form distorted corner-sharing OMn3P tetrahedra. is represented by the CIF file [CIF]
data_Mn2PO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.923
_cell_length_b   6.598
_cell_length_c   10.940
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   355.372
_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
  Mn  Mn0  1  0.066  0.750  0.696  1.0
  Mn  Mn1  1  0.934  0.250  0.304  1.0
  Mn  Mn2  1  0.566  0.250  0.804  1.0
  Mn  Mn3  1  0.434  0.750  0.196  1.0
  Mn  Mn4  1  0.500  0.500  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.000  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  P  P8  1  0.565  0.750  0.888  1.0
  P  P9  1  0.435  0.250  0.112  1.0
  P  P10  1  0.065  0.250  0.612  1.0
  P  P11  1  0.935  0.750  0.388  1.0
  O  O12  1  0.696  0.561  0.828  1.0
  O  O13  1  0.304  0.439  0.172  1.0
  O  O14  1  0.196  0.439  0.672  1.0
  O  O15  1  0.304  0.061  0.172  1.0
  O  O16  1  0.804  0.561  0.328  1.0
  O  O17  1  0.696  0.939  0.828  1.0
  O  O18  1  0.804  0.939  0.328  1.0
  O  O19  1  0.196  0.061  0.672  1.0
  O  O20  1  0.834  0.750  0.526  1.0
  O  O21  1  0.166  0.250  0.474  1.0
  O  O22  1  0.334  0.250  0.974  1.0
  O  O23  1  0.666  0.750  0.026  1.0
  O  O24  1  0.248  0.750  0.882  1.0
  O  O25  1  0.752  0.250  0.118  1.0
  O  O26  1  0.748  0.250  0.618  1.0
  O  O27  1  0.252  0.750  0.382  1.0
[/CIF]
.
The material structure described by Mn2PO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 pentagonal pyramids, corners with four equivalent P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 62-83°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with four equivalent Mn(1)O6 pentagonal pyramids, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(1)O6 pentagonal pyramids, and edges with two equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 pentagonal pyramids, edges with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 61°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), two equivalent Mn(2), and one P(1) atom. In the third O site, O(3) is bonded to one Mn(1), two equivalent Mn(2), and one P(1) atom to form distorted corner-sharing OMn3P tetrahedra. is represented by the CIF file [CIF]
data_Mn2PO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.923
_cell_length_b   6.598
_cell_length_c   10.940
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   355.372
_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
  Mn  Mn0  1  0.066  0.750  0.696  1.0
  Mn  Mn1  1  0.934  0.250  0.304  1.0
  Mn  Mn2  1  0.566  0.250  0.804  1.0
  Mn  Mn3  1  0.434  0.750  0.196  1.0
  Mn  Mn4  1  0.500  0.500  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.000  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  P  P8  1  0.565  0.750  0.888  1.0
  P  P9  1  0.435  0.250  0.112  1.0
  P  P10  1  0.065  0.250  0.612  1.0
  P  P11  1  0.935  0.750  0.388  1.0
  O  O12  1  0.696  0.561  0.828  1.0
  O  O13  1  0.304  0.439  0.172  1.0
  O  O14  1  0.196  0.439  0.672  1.0
  O  O15  1  0.304  0.061  0.172  1.0
  O  O16  1  0.804  0.561  0.328  1.0
  O  O17  1  0.696  0.939  0.828  1.0
  O  O18  1  0.804  0.939  0.328  1.0
  O  O19  1  0.196  0.061  0.672  1.0
  O  O20  1  0.834  0.750  0.526  1.0
  O  O21  1  0.166  0.250  0.474  1.0
  O  O22  1  0.334  0.250  0.974  1.0
  O  O23  1  0.666  0.750  0.026  1.0
  O  O24  1  0.248  0.750  0.882  1.0
  O  O25  1  0.752  0.250  0.118  1.0
  O  O26  1  0.748  0.250  0.618  1.0
  O  O27  1  0.252  0.750  0.382  1.0
[/CIF]
.