The crystal structure described by MgMn2O5 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted edge and corner-sharing MnO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Mn(1) atoms to form distorted corner-sharing OMg2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mg(1) and one Mn(1) atom. is represented by the CIF file [CIF]
data_MgMn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.229
_cell_length_b   5.229
_cell_length_c   11.356
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   138.367
_symmetry_Int_Tables_number   1
_cell_volume   206.271
_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  0.100  0.900  0.750  1.0
  Mg  Mg1  1  0.900  0.100  0.250  1.0
  Mn  Mn2  1  0.788  0.212  0.598  1.0
  Mn  Mn3  1  0.212  0.788  0.402  1.0
  Mn  Mn4  1  0.212  0.788  0.098  1.0
  Mn  Mn5  1  0.788  0.212  0.902  1.0
  O  O6  1  0.300  0.700  0.250  1.0
  O  O7  1  0.700  0.300  0.750  1.0
  O  O8  1  0.760  0.240  0.079  1.0
  O  O9  1  0.240  0.760  0.921  1.0
  O  O10  1  0.240  0.760  0.579  1.0
  O  O11  1  0.760  0.240  0.421  1.0
  O  O12  1  0.961  0.039  0.623  1.0
  O  O13  1  0.039  0.961  0.377  1.0
  O  O14  1  0.961  0.039  0.877  1.0
  O  O15  1  0.039  0.961  0.123  1.0
[/CIF]
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The crystal structure described by MgMn2O5 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted edge and corner-sharing MnO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Mn(1) atoms to form distorted corner-sharing OMg2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mg(1) and one Mn(1) atom. is represented by the CIF file [CIF]
data_MgMn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.229
_cell_length_b   5.229
_cell_length_c   11.356
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   138.367
_symmetry_Int_Tables_number   1
_cell_volume   206.271
_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  0.100  0.900  0.750  1.0
  Mg  Mg1  1  0.900  0.100  0.250  1.0
  Mn  Mn2  1  0.788  0.212  0.598  1.0
  Mn  Mn3  1  0.212  0.788  0.402  1.0
  Mn  Mn4  1  0.212  0.788  0.098  1.0
  Mn  Mn5  1  0.788  0.212  0.902  1.0
  O  O6  1  0.300  0.700  0.250  1.0
  O  O7  1  0.700  0.300  0.750  1.0
  O  O8  1  0.760  0.240  0.079  1.0
  O  O9  1  0.240  0.760  0.921  1.0
  O  O10  1  0.240  0.760  0.579  1.0
  O  O11  1  0.760  0.240  0.421  1.0
  O  O12  1  0.961  0.039  0.623  1.0
  O  O13  1  0.039  0.961  0.377  1.0
  O  O14  1  0.961  0.039  0.877  1.0
  O  O15  1  0.039  0.961  0.123  1.0
[/CIF]
.