The structure described by Mn3AsO8 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) 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 two equivalent As(1)O4 tetrahedra and edges with four equivalent Mn(1)O6 octahedra. As(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are five inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(5) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the fourth O site, O(1) is bonded in a water-like geometry to one Mn(1) and one Mn(2) atom. In the fifth O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one As(1) atom. is represented by the CIF card [CIF]
data_Mn3AsO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.155
_cell_length_b   12.456
_cell_length_c   5.156
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   588.023
_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  0.526  0.118  0.030  1.0
  Mn  Mn1  1  0.026  0.382  0.470  1.0
  Mn  Mn2  1  0.474  0.618  0.970  1.0
  Mn  Mn3  1  0.974  0.882  0.530  1.0
  Mn  Mn4  1  0.474  0.882  0.970  1.0
  Mn  Mn5  1  0.974  0.618  0.530  1.0
  Mn  Mn6  1  0.526  0.382  0.030  1.0
  Mn  Mn7  1  0.026  0.118  0.470  1.0
  Mn  Mn8  1  0.500  0.000  0.500  1.0
  Mn  Mn9  1  0.000  0.500  0.000  1.0
  Mn  Mn10  1  0.500  0.500  0.500  1.0
  Mn  Mn11  1  0.000  0.000  0.000  1.0
  As  As12  1  0.651  0.750  0.478  1.0
  As  As13  1  0.151  0.750  0.022  1.0
  As  As14  1  0.349  0.250  0.522  1.0
  As  As15  1  0.849  0.250  0.978  1.0
  O  O16  1  0.630  0.091  0.319  1.0
  O  O17  1  0.130  0.409  0.181  1.0
  O  O18  1  0.370  0.591  0.681  1.0
  O  O19  1  0.870  0.909  0.819  1.0
  O  O20  1  0.370  0.909  0.681  1.0
  O  O21  1  0.870  0.591  0.819  1.0
  O  O22  1  0.630  0.409  0.319  1.0
  O  O23  1  0.130  0.091  0.181  1.0
  O  O24  1  0.413  0.138  0.681  1.0
  O  O25  1  0.913  0.362  0.819  1.0
  O  O26  1  0.587  0.638  0.319  1.0
  O  O27  1  0.087  0.862  0.181  1.0
  O  O28  1  0.587  0.862  0.319  1.0
  O  O29  1  0.087  0.638  0.181  1.0
  O  O30  1  0.413  0.362  0.681  1.0
  O  O31  1  0.913  0.138  0.819  1.0
  O  O32  1  0.395  0.005  0.168  1.0
  O  O33  1  0.895  0.495  0.332  1.0
  O  O34  1  0.605  0.505  0.832  1.0
  O  O35  1  0.105  0.995  0.668  1.0
  O  O36  1  0.605  0.995  0.832  1.0
  O  O37  1  0.105  0.505  0.668  1.0
  O  O38  1  0.395  0.495  0.168  1.0
  O  O39  1  0.895  0.005  0.332  1.0
  O  O40  1  0.590  0.750  0.798  1.0
  O  O41  1  0.090  0.750  0.702  1.0
  O  O42  1  0.410  0.250  0.202  1.0
  O  O43  1  0.910  0.250  0.298  1.0
  O  O44  1  0.660  0.250  0.941  1.0
  O  O45  1  0.160  0.250  0.559  1.0
  O  O46  1  0.340  0.750  0.059  1.0
  O  O47  1  0.840  0.750  0.441  1.0
[/CIF]
.
The structure described by Mn3AsO8 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) 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 two equivalent As(1)O4 tetrahedra and edges with four equivalent Mn(1)O6 octahedra. As(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are five inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(5) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the fourth O site, O(1) is bonded in a water-like geometry to one Mn(1) and one Mn(2) atom. In the fifth O site, O(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one As(1) atom. is represented by the CIF card [CIF]
data_Mn3AsO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.155
_cell_length_b   12.456
_cell_length_c   5.156
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   588.023
_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  0.526  0.118  0.030  1.0
  Mn  Mn1  1  0.026  0.382  0.470  1.0
  Mn  Mn2  1  0.474  0.618  0.970  1.0
  Mn  Mn3  1  0.974  0.882  0.530  1.0
  Mn  Mn4  1  0.474  0.882  0.970  1.0
  Mn  Mn5  1  0.974  0.618  0.530  1.0
  Mn  Mn6  1  0.526  0.382  0.030  1.0
  Mn  Mn7  1  0.026  0.118  0.470  1.0
  Mn  Mn8  1  0.500  0.000  0.500  1.0
  Mn  Mn9  1  0.000  0.500  0.000  1.0
  Mn  Mn10  1  0.500  0.500  0.500  1.0
  Mn  Mn11  1  0.000  0.000  0.000  1.0
  As  As12  1  0.651  0.750  0.478  1.0
  As  As13  1  0.151  0.750  0.022  1.0
  As  As14  1  0.349  0.250  0.522  1.0
  As  As15  1  0.849  0.250  0.978  1.0
  O  O16  1  0.630  0.091  0.319  1.0
  O  O17  1  0.130  0.409  0.181  1.0
  O  O18  1  0.370  0.591  0.681  1.0
  O  O19  1  0.870  0.909  0.819  1.0
  O  O20  1  0.370  0.909  0.681  1.0
  O  O21  1  0.870  0.591  0.819  1.0
  O  O22  1  0.630  0.409  0.319  1.0
  O  O23  1  0.130  0.091  0.181  1.0
  O  O24  1  0.413  0.138  0.681  1.0
  O  O25  1  0.913  0.362  0.819  1.0
  O  O26  1  0.587  0.638  0.319  1.0
  O  O27  1  0.087  0.862  0.181  1.0
  O  O28  1  0.587  0.862  0.319  1.0
  O  O29  1  0.087  0.638  0.181  1.0
  O  O30  1  0.413  0.362  0.681  1.0
  O  O31  1  0.913  0.138  0.819  1.0
  O  O32  1  0.395  0.005  0.168  1.0
  O  O33  1  0.895  0.495  0.332  1.0
  O  O34  1  0.605  0.505  0.832  1.0
  O  O35  1  0.105  0.995  0.668  1.0
  O  O36  1  0.605  0.995  0.832  1.0
  O  O37  1  0.105  0.505  0.668  1.0
  O  O38  1  0.395  0.495  0.168  1.0
  O  O39  1  0.895  0.005  0.332  1.0
  O  O40  1  0.590  0.750  0.798  1.0
  O  O41  1  0.090  0.750  0.702  1.0
  O  O42  1  0.410  0.250  0.202  1.0
  O  O43  1  0.910  0.250  0.298  1.0
  O  O44  1  0.660  0.250  0.941  1.0
  O  O45  1  0.160  0.250  0.559  1.0
  O  O46  1  0.340  0.750  0.059  1.0
  O  O47  1  0.840  0.750  0.441  1.0
[/CIF]
.