The structure described by Mn2As2O7 crystallizes in the monoclinic C2/m space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with six equivalent As(1)O4 tetrahedra and edges with three equivalent Mn(1)O6 octahedra. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-67°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent As(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mn(1) and one As(1) atom. is represented by the CIF file [CIF]
data_Mn2As2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.816
_cell_length_b   5.352
_cell_length_c   5.352
_cell_angle_alpha   103.583
_cell_angle_beta   98.446
_cell_angle_gamma   98.446
_symmetry_Int_Tables_number   1
_cell_volume   130.275
_cell_formula_units_Z   1
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
  As  As0  1  0.098  0.768  0.768  1.0
  As  As1  1  0.902  0.232  0.232  1.0
  Mn  Mn2  1  0.500  0.686  0.314  1.0
  Mn  Mn3  1  0.500  0.314  0.686  1.0
  O  O4  1  0.000  0.000  0.000  1.0
  O  O5  1  0.766  0.597  0.597  1.0
  O  O6  1  0.234  0.403  0.403  1.0
  O  O7  1  0.287  0.939  0.597  1.0
  O  O8  1  0.713  0.403  0.061  1.0
  O  O9  1  0.713  0.061  0.403  1.0
  O  O10  1  0.287  0.597  0.939  1.0
[/CIF]
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The structure described by Mn2As2O7 crystallizes in the monoclinic C2/m space group. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted MnO6 octahedra that share corners with six equivalent As(1)O4 tetrahedra and edges with three equivalent Mn(1)O6 octahedra. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AsO4 tetrahedra that share corners with six equivalent Mn(1)O6 octahedra and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-67°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent As(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mn(1) and one As(1) atom. is represented by the CIF file [CIF]
data_Mn2As2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.816
_cell_length_b   5.352
_cell_length_c   5.352
_cell_angle_alpha   103.583
_cell_angle_beta   98.446
_cell_angle_gamma   98.446
_symmetry_Int_Tables_number   1
_cell_volume   130.275
_cell_formula_units_Z   1
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
  As  As0  1  0.098  0.768  0.768  1.0
  As  As1  1  0.902  0.232  0.232  1.0
  Mn  Mn2  1  0.500  0.686  0.314  1.0
  Mn  Mn3  1  0.500  0.314  0.686  1.0
  O  O4  1  0.000  0.000  0.000  1.0
  O  O5  1  0.766  0.597  0.597  1.0
  O  O6  1  0.234  0.403  0.403  1.0
  O  O7  1  0.287  0.939  0.597  1.0
  O  O8  1  0.713  0.403  0.061  1.0
  O  O9  1  0.713  0.061  0.403  1.0
  O  O10  1  0.287  0.597  0.939  1.0
[/CIF]
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