The crystal structure described by Mn(PO3)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent 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  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-59°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-58°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one P(1) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Mn(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.369
_cell_length_b   7.369
_cell_length_c   10.181
_cell_angle_alpha   66.168
_cell_angle_beta   66.168
_cell_angle_gamma   69.819
_symmetry_Int_Tables_number   1
_cell_volume   451.563
_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  0.000  0.500  0.500  1.0
  Mn  Mn1  1  0.500  0.000  0.000  1.0
  Mn  Mn2  1  0.546  0.454  0.750  1.0
  Mn  Mn3  1  0.454  0.546  0.250  1.0
  P  P4  1  0.800  0.812  0.695  1.0
  P  P5  1  0.188  0.200  0.805  1.0
  P  P6  1  0.200  0.188  0.305  1.0
  P  P7  1  0.812  0.800  0.195  1.0
  P  P8  1  0.757  0.225  0.477  1.0
  P  P9  1  0.775  0.243  0.023  1.0
  P  P10  1  0.243  0.775  0.523  1.0
  P  P11  1  0.225  0.757  0.977  1.0
  O  O12  1  0.035  0.802  0.656  1.0
  O  O13  1  0.198  0.965  0.844  1.0
  O  O14  1  0.965  0.198  0.344  1.0
  O  O15  1  0.802  0.035  0.156  1.0
  O  O16  1  0.733  0.996  0.561  1.0
  O  O17  1  0.004  0.267  0.939  1.0
  O  O18  1  0.267  0.004  0.439  1.0
  O  O19  1  0.996  0.733  0.061  1.0
  O  O20  1  0.692  0.851  0.841  1.0
  O  O21  1  0.149  0.308  0.659  1.0
  O  O22  1  0.308  0.149  0.159  1.0
  O  O23  1  0.851  0.692  0.341  1.0
  O  O24  1  0.780  0.626  0.679  1.0
  O  O25  1  0.374  0.220  0.821  1.0
  O  O26  1  0.220  0.374  0.321  1.0
  O  O27  1  0.626  0.780  0.179  1.0
  O  O28  1  0.788  0.302  0.581  1.0
  O  O29  1  0.698  0.212  0.919  1.0
  O  O30  1  0.212  0.698  0.419  1.0
  O  O31  1  0.302  0.788  0.081  1.0
  O  O32  1  0.409  0.663  0.589  1.0
  O  O33  1  0.337  0.591  0.911  1.0
  O  O34  1  0.591  0.337  0.411  1.0
  O  O35  1  0.663  0.409  0.089  1.0
[/CIF]
.
The crystal structure described by Mn(PO3)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent 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  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-59°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-58°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one P(1) atom. In the third O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Mn(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.369
_cell_length_b   7.369
_cell_length_c   10.181
_cell_angle_alpha   66.168
_cell_angle_beta   66.168
_cell_angle_gamma   69.819
_symmetry_Int_Tables_number   1
_cell_volume   451.563
_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  0.000  0.500  0.500  1.0
  Mn  Mn1  1  0.500  0.000  0.000  1.0
  Mn  Mn2  1  0.546  0.454  0.750  1.0
  Mn  Mn3  1  0.454  0.546  0.250  1.0
  P  P4  1  0.800  0.812  0.695  1.0
  P  P5  1  0.188  0.200  0.805  1.0
  P  P6  1  0.200  0.188  0.305  1.0
  P  P7  1  0.812  0.800  0.195  1.0
  P  P8  1  0.757  0.225  0.477  1.0
  P  P9  1  0.775  0.243  0.023  1.0
  P  P10  1  0.243  0.775  0.523  1.0
  P  P11  1  0.225  0.757  0.977  1.0
  O  O12  1  0.035  0.802  0.656  1.0
  O  O13  1  0.198  0.965  0.844  1.0
  O  O14  1  0.965  0.198  0.344  1.0
  O  O15  1  0.802  0.035  0.156  1.0
  O  O16  1  0.733  0.996  0.561  1.0
  O  O17  1  0.004  0.267  0.939  1.0
  O  O18  1  0.267  0.004  0.439  1.0
  O  O19  1  0.996  0.733  0.061  1.0
  O  O20  1  0.692  0.851  0.841  1.0
  O  O21  1  0.149  0.308  0.659  1.0
  O  O22  1  0.308  0.149  0.159  1.0
  O  O23  1  0.851  0.692  0.341  1.0
  O  O24  1  0.780  0.626  0.679  1.0
  O  O25  1  0.374  0.220  0.821  1.0
  O  O26  1  0.220  0.374  0.321  1.0
  O  O27  1  0.626  0.780  0.179  1.0
  O  O28  1  0.788  0.302  0.581  1.0
  O  O29  1  0.698  0.212  0.919  1.0
  O  O30  1  0.212  0.698  0.419  1.0
  O  O31  1  0.302  0.788  0.081  1.0
  O  O32  1  0.409  0.663  0.589  1.0
  O  O33  1  0.337  0.591  0.911  1.0
  O  O34  1  0.591  0.337  0.411  1.0
  O  O35  1  0.663  0.409  0.089  1.0
[/CIF]
.