The structure described by Ba2Mn(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), and two equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. 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. The corner-sharing octahedral tilt angles range from 41-46°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-65°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Ba(2) and one P(1) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Ba(2), one Mn(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the fifth O site, O(8) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one Ba(1), one Mn(1), and one P(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Ba2Mn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   9.117
_cell_length_c   16.445
_cell_angle_alpha   90.000
_cell_angle_beta   90.359
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   811.589
_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
  Ba  Ba0  1  0.240  0.657  0.770  1.0
  Ba  Ba1  1  0.260  0.157  0.730  1.0
  Ba  Ba2  1  0.760  0.343  0.230  1.0
  Ba  Ba3  1  0.740  0.843  0.270  1.0
  Ba  Ba4  1  0.796  0.202  0.479  1.0
  Ba  Ba5  1  0.704  0.702  0.021  1.0
  Ba  Ba6  1  0.204  0.798  0.521  1.0
  Ba  Ba7  1  0.296  0.298  0.979  1.0
  Mn  Mn8  1  0.768  0.018  0.864  1.0
  Mn  Mn9  1  0.732  0.518  0.636  1.0
  Mn  Mn10  1  0.268  0.482  0.364  1.0
  Mn  Mn11  1  0.232  0.982  0.136  1.0
  P  P12  1  0.741  0.896  0.663  1.0
  P  P13  1  0.759  0.396  0.837  1.0
  P  P14  1  0.259  0.104  0.337  1.0
  P  P15  1  0.241  0.604  0.163  1.0
  P  P16  1  0.240  0.905  0.922  1.0
  P  P17  1  0.740  0.595  0.422  1.0
  P  P18  1  0.760  0.095  0.078  1.0
  P  P19  1  0.260  0.405  0.578  1.0
  O  O20  1  0.838  0.989  0.736  1.0
  O  O21  1  0.662  0.489  0.764  1.0
  O  O22  1  0.162  0.011  0.264  1.0
  O  O23  1  0.338  0.511  0.236  1.0
  O  O24  1  0.454  0.888  0.666  1.0
  O  O25  1  0.046  0.388  0.834  1.0
  O  O26  1  0.546  0.112  0.334  1.0
  O  O27  1  0.954  0.612  0.166  1.0
  O  O28  1  0.858  0.739  0.670  1.0
  O  O29  1  0.642  0.239  0.830  1.0
  O  O30  1  0.142  0.261  0.330  1.0
  O  O31  1  0.358  0.761  0.170  1.0
  O  O32  1  0.829  0.968  0.582  1.0
  O  O33  1  0.671  0.468  0.918  1.0
  O  O34  1  0.171  0.032  0.418  1.0
  O  O35  1  0.329  0.532  0.082  1.0
  O  O36  1  0.477  0.852  0.877  1.0
  O  O37  1  0.023  0.352  0.623  1.0
  O  O38  1  0.523  0.148  0.123  1.0
  O  O39  1  0.977  0.648  0.377  1.0
  O  O40  1  0.790  0.598  0.514  1.0
  O  O41  1  0.710  0.098  0.986  1.0
  O  O42  1  0.210  0.402  0.486  1.0
  O  O43  1  0.290  0.902  0.014  1.0
  O  O44  1  0.521  0.699  0.399  1.0
  O  O45  1  0.979  0.199  0.101  1.0
  O  O46  1  0.169  0.060  0.889  1.0
  O  O47  1  0.021  0.801  0.899  1.0
  O  O48  1  0.669  0.440  0.389  1.0
  O  O49  1  0.831  0.940  0.111  1.0
  O  O50  1  0.331  0.560  0.611  1.0
  O  O51  1  0.479  0.301  0.601  1.0
[/CIF]
.
The structure described by Ba2Mn(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), one O(7), one O(8), and two equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. 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. The corner-sharing octahedral tilt angles range from 41-46°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-65°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Ba(2) and one P(1) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Ba(2), one Mn(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the fifth O site, O(8) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(2) atom. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one Ba(1), one Mn(1), and one P(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one Ba(2), two equivalent Ba(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), one Mn(1), and one P(1) atom. is represented by the CIF card [CIF]
data_Ba2Mn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   9.117
_cell_length_c   16.445
_cell_angle_alpha   90.000
_cell_angle_beta   90.359
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   811.589
_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
  Ba  Ba0  1  0.240  0.657  0.770  1.0
  Ba  Ba1  1  0.260  0.157  0.730  1.0
  Ba  Ba2  1  0.760  0.343  0.230  1.0
  Ba  Ba3  1  0.740  0.843  0.270  1.0
  Ba  Ba4  1  0.796  0.202  0.479  1.0
  Ba  Ba5  1  0.704  0.702  0.021  1.0
  Ba  Ba6  1  0.204  0.798  0.521  1.0
  Ba  Ba7  1  0.296  0.298  0.979  1.0
  Mn  Mn8  1  0.768  0.018  0.864  1.0
  Mn  Mn9  1  0.732  0.518  0.636  1.0
  Mn  Mn10  1  0.268  0.482  0.364  1.0
  Mn  Mn11  1  0.232  0.982  0.136  1.0
  P  P12  1  0.741  0.896  0.663  1.0
  P  P13  1  0.759  0.396  0.837  1.0
  P  P14  1  0.259  0.104  0.337  1.0
  P  P15  1  0.241  0.604  0.163  1.0
  P  P16  1  0.240  0.905  0.922  1.0
  P  P17  1  0.740  0.595  0.422  1.0
  P  P18  1  0.760  0.095  0.078  1.0
  P  P19  1  0.260  0.405  0.578  1.0
  O  O20  1  0.838  0.989  0.736  1.0
  O  O21  1  0.662  0.489  0.764  1.0
  O  O22  1  0.162  0.011  0.264  1.0
  O  O23  1  0.338  0.511  0.236  1.0
  O  O24  1  0.454  0.888  0.666  1.0
  O  O25  1  0.046  0.388  0.834  1.0
  O  O26  1  0.546  0.112  0.334  1.0
  O  O27  1  0.954  0.612  0.166  1.0
  O  O28  1  0.858  0.739  0.670  1.0
  O  O29  1  0.642  0.239  0.830  1.0
  O  O30  1  0.142  0.261  0.330  1.0
  O  O31  1  0.358  0.761  0.170  1.0
  O  O32  1  0.829  0.968  0.582  1.0
  O  O33  1  0.671  0.468  0.918  1.0
  O  O34  1  0.171  0.032  0.418  1.0
  O  O35  1  0.329  0.532  0.082  1.0
  O  O36  1  0.477  0.852  0.877  1.0
  O  O37  1  0.023  0.352  0.623  1.0
  O  O38  1  0.523  0.148  0.123  1.0
  O  O39  1  0.977  0.648  0.377  1.0
  O  O40  1  0.790  0.598  0.514  1.0
  O  O41  1  0.710  0.098  0.986  1.0
  O  O42  1  0.210  0.402  0.486  1.0
  O  O43  1  0.290  0.902  0.014  1.0
  O  O44  1  0.521  0.699  0.399  1.0
  O  O45  1  0.979  0.199  0.101  1.0
  O  O46  1  0.169  0.060  0.889  1.0
  O  O47  1  0.021  0.801  0.899  1.0
  O  O48  1  0.669  0.440  0.389  1.0
  O  O49  1  0.831  0.940  0.111  1.0
  O  O50  1  0.331  0.560  0.611  1.0
  O  O51  1  0.479  0.301  0.601  1.0
[/CIF]
.