The compound described by MgMn2(PO5)2 crystallizes in the orthorhombic Fdd2 space group. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(3) and two equivalent O(5) atoms. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a 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 bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. is represented by the CIF file [CIF]
data_MgMn2(PO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.637
_cell_length_b   6.637
_cell_length_c   8.987
_cell_angle_alpha   102.404
_cell_angle_beta   102.404
_cell_angle_gamma   114.725
_symmetry_Int_Tables_number   1
_cell_volume   329.842
_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  0.495  0.995  0.500  1.0
  Mg  Mg1  1  0.245  0.245  0.000  1.0
  Mn  Mn2  1  0.872  0.619  0.251  1.0
  Mn  Mn3  1  0.368  0.621  0.749  1.0
  Mn  Mn4  1  0.871  0.118  0.249  1.0
  Mn  Mn5  1  0.869  0.622  0.751  1.0
  P  P6  1  0.037  0.038  0.585  1.0
  P  P7  1  0.702  0.203  0.915  1.0
  P  P8  1  0.453  0.452  0.415  1.0
  P  P9  1  0.288  0.787  0.085  1.0
  O  O10  1  0.581  0.553  0.302  1.0
  O  O11  1  0.662  0.667  0.839  1.0
  O  O12  1  0.309  0.585  0.975  1.0
  O  O13  1  0.803  0.331  0.802  1.0
  O  O14  1  0.214  0.238  0.297  1.0
  O  O15  1  0.427  0.652  0.523  1.0
  O  O16  1  0.073  0.578  0.661  1.0
  O  O17  1  0.828  0.823  0.161  1.0
  O  O18  1  0.917  0.412  0.339  1.0
  O  O19  1  0.167  0.690  0.203  1.0
  O  O20  1  0.251  0.279  0.698  1.0
  O  O21  1  0.488  0.964  0.797  1.0
  O  O22  1  0.940  0.917  0.703  1.0
  O  O23  1  0.155  0.879  0.977  1.0
  O  O24  1  0.129  0.905  0.477  1.0
  O  O25  1  0.902  0.177  0.023  1.0
  O  O26  1  0.835  0.059  0.475  1.0
  O  O27  1  0.610  0.333  0.025  1.0
  O  O28  1  0.529  0.001  0.198  1.0
  O  O29  1  0.583  0.360  0.525  1.0
[/CIF]
.
The compound described by MgMn2(PO5)2 crystallizes in the orthorhombic Fdd2 space group. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(3) and two equivalent O(5) atoms. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a 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 bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. is represented by the CIF file [CIF]
data_MgMn2(PO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.637
_cell_length_b   6.637
_cell_length_c   8.987
_cell_angle_alpha   102.404
_cell_angle_beta   102.404
_cell_angle_gamma   114.725
_symmetry_Int_Tables_number   1
_cell_volume   329.842
_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  0.495  0.995  0.500  1.0
  Mg  Mg1  1  0.245  0.245  0.000  1.0
  Mn  Mn2  1  0.872  0.619  0.251  1.0
  Mn  Mn3  1  0.368  0.621  0.749  1.0
  Mn  Mn4  1  0.871  0.118  0.249  1.0
  Mn  Mn5  1  0.869  0.622  0.751  1.0
  P  P6  1  0.037  0.038  0.585  1.0
  P  P7  1  0.702  0.203  0.915  1.0
  P  P8  1  0.453  0.452  0.415  1.0
  P  P9  1  0.288  0.787  0.085  1.0
  O  O10  1  0.581  0.553  0.302  1.0
  O  O11  1  0.662  0.667  0.839  1.0
  O  O12  1  0.309  0.585  0.975  1.0
  O  O13  1  0.803  0.331  0.802  1.0
  O  O14  1  0.214  0.238  0.297  1.0
  O  O15  1  0.427  0.652  0.523  1.0
  O  O16  1  0.073  0.578  0.661  1.0
  O  O17  1  0.828  0.823  0.161  1.0
  O  O18  1  0.917  0.412  0.339  1.0
  O  O19  1  0.167  0.690  0.203  1.0
  O  O20  1  0.251  0.279  0.698  1.0
  O  O21  1  0.488  0.964  0.797  1.0
  O  O22  1  0.940  0.917  0.703  1.0
  O  O23  1  0.155  0.879  0.977  1.0
  O  O24  1  0.129  0.905  0.477  1.0
  O  O25  1  0.902  0.177  0.023  1.0
  O  O26  1  0.835  0.059  0.475  1.0
  O  O27  1  0.610  0.333  0.025  1.0
  O  O28  1  0.529  0.001  0.198  1.0
  O  O29  1  0.583  0.360  0.525  1.0
[/CIF]
.