The structure described by Mg2Mn3O8 is beta indium sulfide-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and three equivalent O(2) atoms to form MgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-62°. In the second Mg site, Mg(2) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and three equivalent Mn(1) atoms to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), and two equivalent Mn(1) atoms to form distorted OMg2Mn2 tetrahedra that share corners with two equivalent O(2)Mg2Mn2 tetrahedra,  a cornercorner with one O(1)MgMn3 trigonal pyramid, edges with two equivalent O(2)Mg2Mn2 tetrahedra, and  an edgeedge with one O(1)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(2) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_Mg2Mn3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.967
_cell_length_b   5.967
_cell_length_c   5.967
_cell_angle_alpha   58.839
_cell_angle_beta   58.839
_cell_angle_gamma   58.839
_symmetry_Int_Tables_number   1
_cell_volume   146.268
_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
  Mg  Mg0  1  0.119  0.119  0.119  1.0
  Mg  Mg1  1  0.500  0.500  0.500  1.0
  Mn  Mn2  1  0.502  0.993  0.502  1.0
  Mn  Mn3  1  0.502  0.502  0.993  1.0
  Mn  Mn4  1  0.993  0.502  0.502  1.0
  O  O5  1  0.261  0.261  0.261  1.0
  O  O6  1  0.710  0.256  0.256  1.0
  O  O7  1  0.256  0.256  0.710  1.0
  O  O8  1  0.256  0.710  0.256  1.0
  O  O9  1  0.747  0.747  0.297  1.0
  O  O10  1  0.747  0.297  0.747  1.0
  O  O11  1  0.297  0.747  0.747  1.0
  O  O12  1  0.735  0.735  0.735  1.0
[/CIF]
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The structure described by Mg2Mn3O8 is beta indium sulfide-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and three equivalent O(2) atoms to form MgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-62°. In the second Mg site, Mg(2) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Mn(1)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and three equivalent Mn(1) atoms to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Mg(2), and two equivalent Mn(1) atoms to form distorted OMg2Mn2 tetrahedra that share corners with two equivalent O(2)Mg2Mn2 tetrahedra,  a cornercorner with one O(1)MgMn3 trigonal pyramid, edges with two equivalent O(2)Mg2Mn2 tetrahedra, and  an edgeedge with one O(1)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(2) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_Mg2Mn3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.967
_cell_length_b   5.967
_cell_length_c   5.967
_cell_angle_alpha   58.839
_cell_angle_beta   58.839
_cell_angle_gamma   58.839
_symmetry_Int_Tables_number   1
_cell_volume   146.268
_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
  Mg  Mg0  1  0.119  0.119  0.119  1.0
  Mg  Mg1  1  0.500  0.500  0.500  1.0
  Mn  Mn2  1  0.502  0.993  0.502  1.0
  Mn  Mn3  1  0.502  0.502  0.993  1.0
  Mn  Mn4  1  0.993  0.502  0.502  1.0
  O  O5  1  0.261  0.261  0.261  1.0
  O  O6  1  0.710  0.256  0.256  1.0
  O  O7  1  0.256  0.256  0.710  1.0
  O  O8  1  0.256  0.710  0.256  1.0
  O  O9  1  0.747  0.747  0.297  1.0
  O  O10  1  0.747  0.297  0.747  1.0
  O  O11  1  0.297  0.747  0.747  1.0
  O  O12  1  0.735  0.735  0.735  1.0
[/CIF]
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