The crystal structure described by Mg2Mn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(4) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 54°. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent Mg(1)O5 trigonal bipyramids. 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 three equivalent Mn(1)O6 octahedra, corners with three equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Mg2Mn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.091
_cell_length_b   7.678
_cell_length_c   8.386
_cell_angle_alpha   89.979
_cell_angle_beta   89.982
_cell_angle_gamma   86.501
_symmetry_Int_Tables_number   1
_cell_volume   327.204
_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
  Mg  Mg0  1  0.406  0.107  0.359  1.0
  Mg  Mg1  1  0.906  0.607  0.141  1.0
  Mg  Mg2  1  0.594  0.893  0.641  1.0
  Mg  Mg3  1  0.094  0.393  0.859  1.0
  Mn  Mn4  1  1.000  0.500  0.500  1.0
  Mn  Mn5  1  0.500  1.000  0.000  1.0
  O  O6  1  0.673  0.557  0.348  1.0
  O  O7  1  0.173  0.057  0.152  1.0
  O  O8  1  0.327  0.443  0.652  1.0
  O  O9  1  0.827  0.943  0.848  1.0
  O  O10  1  0.192  0.636  0.294  1.0
  O  O11  1  0.691  0.136  0.206  1.0
  O  O12  1  0.808  0.364  0.706  1.0
  O  O13  1  0.309  0.864  0.794  1.0
  O  O14  1  0.567  0.762  0.137  1.0
  O  O15  1  0.066  0.262  0.363  1.0
  O  O16  1  0.433  0.238  0.863  1.0
  O  O17  1  0.934  0.738  0.637  1.0
  O  O18  1  0.466  0.855  0.421  1.0
  O  O19  1  0.965  0.355  0.079  1.0
  O  O20  1  0.534  0.145  0.579  1.0
  O  O21  1  0.035  0.645  0.921  1.0
  P  P22  1  0.467  0.702  0.302  1.0
  P  P23  1  0.967  0.202  0.198  1.0
  P  P24  1  0.533  0.298  0.698  1.0
  P  P25  1  0.033  0.798  0.802  1.0
[/CIF]
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The crystal structure described by Mg2Mn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(1), one O(2), one O(3), and two equivalent O(4) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 54°. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent Mg(1)O5 trigonal bipyramids. 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 three equivalent Mn(1)O6 octahedra, corners with three equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one P(1) atom. is represented by the CIF file [CIF]
data_Mg2Mn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.091
_cell_length_b   7.678
_cell_length_c   8.386
_cell_angle_alpha   89.979
_cell_angle_beta   89.982
_cell_angle_gamma   86.501
_symmetry_Int_Tables_number   1
_cell_volume   327.204
_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
  Mg  Mg0  1  0.406  0.107  0.359  1.0
  Mg  Mg1  1  0.906  0.607  0.141  1.0
  Mg  Mg2  1  0.594  0.893  0.641  1.0
  Mg  Mg3  1  0.094  0.393  0.859  1.0
  Mn  Mn4  1  1.000  0.500  0.500  1.0
  Mn  Mn5  1  0.500  1.000  0.000  1.0
  O  O6  1  0.673  0.557  0.348  1.0
  O  O7  1  0.173  0.057  0.152  1.0
  O  O8  1  0.327  0.443  0.652  1.0
  O  O9  1  0.827  0.943  0.848  1.0
  O  O10  1  0.192  0.636  0.294  1.0
  O  O11  1  0.691  0.136  0.206  1.0
  O  O12  1  0.808  0.364  0.706  1.0
  O  O13  1  0.309  0.864  0.794  1.0
  O  O14  1  0.567  0.762  0.137  1.0
  O  O15  1  0.066  0.262  0.363  1.0
  O  O16  1  0.433  0.238  0.863  1.0
  O  O17  1  0.934  0.738  0.637  1.0
  O  O18  1  0.466  0.855  0.421  1.0
  O  O19  1  0.965  0.355  0.079  1.0
  O  O20  1  0.534  0.145  0.579  1.0
  O  O21  1  0.035  0.645  0.921  1.0
  P  P22  1  0.467  0.702  0.302  1.0
  P  P23  1  0.967  0.202  0.198  1.0
  P  P24  1  0.533  0.298  0.698  1.0
  P  P25  1  0.033  0.798  0.802  1.0
[/CIF]
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