The crystal structure described by Mn2AsO5 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra, corners with four equivalent Mn(2)O5 trigonal bipyramids, and edges with two equivalent Mn(1)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO5 trigonal bipyramids that share corners with four equivalent Mn(1)O6 octahedra, corners with four equivalent As(1)O4 tetrahedra, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-60°. As(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 55-67°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mn(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn2AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.024
_cell_length_b   8.647
_cell_length_c   8.462
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   440.789
_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  0.740  0.500  0.500  1.0
  Mn  Mn1  1  0.760  0.000  0.000  1.0
  Mn  Mn2  1  0.260  0.500  0.500  1.0
  Mn  Mn3  1  0.240  0.000  0.000  1.0
  Mn  Mn4  1  0.000  0.874  0.353  1.0
  Mn  Mn5  1  0.000  0.126  0.647  1.0
  Mn  Mn6  1  0.500  0.374  0.147  1.0
  Mn  Mn7  1  0.500  0.626  0.853  1.0
  As  As8  1  0.500  0.745  0.239  1.0
  As  As9  1  0.500  0.255  0.761  1.0
  As  As10  1  0.000  0.245  0.261  1.0
  As  As11  1  0.000  0.755  0.739  1.0
  O  O12  1  0.000  0.930  0.132  1.0
  O  O13  1  0.000  0.070  0.868  1.0
  O  O14  1  0.500  0.430  0.368  1.0
  O  O15  1  0.500  0.570  0.632  1.0
  O  O16  1  0.500  0.918  0.134  1.0
  O  O17  1  0.500  0.082  0.866  1.0
  O  O18  1  0.000  0.418  0.366  1.0
  O  O19  1  0.000  0.582  0.634  1.0
  O  O20  1  0.500  0.608  0.095  1.0
  O  O21  1  0.500  0.392  0.905  1.0
  O  O22  1  0.000  0.108  0.405  1.0
  O  O23  1  0.000  0.892  0.595  1.0
  O  O24  1  0.730  0.730  0.352  1.0
  O  O25  1  0.730  0.270  0.648  1.0
  O  O26  1  0.770  0.230  0.148  1.0
  O  O27  1  0.770  0.770  0.852  1.0
  O  O28  1  0.270  0.270  0.648  1.0
  O  O29  1  0.270  0.730  0.352  1.0
  O  O30  1  0.230  0.770  0.852  1.0
  O  O31  1  0.230  0.230  0.148  1.0
[/CIF]
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The crystal structure described by Mn2AsO5 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra, corners with four equivalent Mn(2)O5 trigonal bipyramids, and edges with two equivalent Mn(1)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO5 trigonal bipyramids that share corners with four equivalent Mn(1)O6 octahedra, corners with four equivalent As(1)O4 tetrahedra, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-60°. As(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 55-67°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one As(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mn(2) and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn2AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.024
_cell_length_b   8.647
_cell_length_c   8.462
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   440.789
_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  0.740  0.500  0.500  1.0
  Mn  Mn1  1  0.760  0.000  0.000  1.0
  Mn  Mn2  1  0.260  0.500  0.500  1.0
  Mn  Mn3  1  0.240  0.000  0.000  1.0
  Mn  Mn4  1  0.000  0.874  0.353  1.0
  Mn  Mn5  1  0.000  0.126  0.647  1.0
  Mn  Mn6  1  0.500  0.374  0.147  1.0
  Mn  Mn7  1  0.500  0.626  0.853  1.0
  As  As8  1  0.500  0.745  0.239  1.0
  As  As9  1  0.500  0.255  0.761  1.0
  As  As10  1  0.000  0.245  0.261  1.0
  As  As11  1  0.000  0.755  0.739  1.0
  O  O12  1  0.000  0.930  0.132  1.0
  O  O13  1  0.000  0.070  0.868  1.0
  O  O14  1  0.500  0.430  0.368  1.0
  O  O15  1  0.500  0.570  0.632  1.0
  O  O16  1  0.500  0.918  0.134  1.0
  O  O17  1  0.500  0.082  0.866  1.0
  O  O18  1  0.000  0.418  0.366  1.0
  O  O19  1  0.000  0.582  0.634  1.0
  O  O20  1  0.500  0.608  0.095  1.0
  O  O21  1  0.500  0.392  0.905  1.0
  O  O22  1  0.000  0.108  0.405  1.0
  O  O23  1  0.000  0.892  0.595  1.0
  O  O24  1  0.730  0.730  0.352  1.0
  O  O25  1  0.730  0.270  0.648  1.0
  O  O26  1  0.770  0.230  0.148  1.0
  O  O27  1  0.770  0.770  0.852  1.0
  O  O28  1  0.270  0.270  0.648  1.0
  O  O29  1  0.270  0.730  0.352  1.0
  O  O30  1  0.230  0.770  0.852  1.0
  O  O31  1  0.230  0.230  0.148  1.0
[/CIF]
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