The material structure described by RbMgMn4O8 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form MgO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with four equivalent Mn(2)O6 octahedra, and faces with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), two equivalent O(3), and three equivalent O(2) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, edges with four equivalent Mn(1)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. In the second Mn site, Mn(2) is bonded to one O(3), two equivalent O(1), and three equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Rb(1), one Mg(1), one Mn(1), and two equivalent Mn(2) atoms to form distorted corner-sharing ORbMgMn3 trigonal pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and three equivalent Mn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbMgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.539
_cell_length_b   7.658
_cell_length_c   7.539
_cell_angle_alpha   92.224
_cell_angle_beta   156.094
_cell_angle_gamma   92.617
_symmetry_Int_Tables_number   1
_cell_volume   172.700
_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
  Rb  Rb0  1  0.500  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.500  0.500  1.0
  Mn  Mn2  1  0.814  0.161  0.347  1.0
  Mn  Mn3  1  0.337  0.505  0.167  1.0
  Mn  Mn4  1  0.663  0.495  0.833  1.0
  Mn  Mn5  1  0.186  0.839  0.653  1.0
  O  O6  1  0.815  0.351  0.536  1.0
  O  O7  1  0.807  0.970  0.164  1.0
  O  O8  1  0.526  0.659  0.134  1.0
  O  O9  1  0.157  0.369  0.212  1.0
  O  O10  1  0.843  0.631  0.788  1.0
  O  O11  1  0.474  0.341  0.866  1.0
  O  O12  1  0.193  0.030  0.836  1.0
  O  O13  1  0.185  0.649  0.464  1.0
[/CIF]
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The material structure described by RbMgMn4O8 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form MgO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, edges with four equivalent Mn(2)O6 octahedra, and faces with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), two equivalent O(3), and three equivalent O(2) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mn(2)O6 octahedra, edges with four equivalent Mn(1)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. In the second Mn site, Mn(2) is bonded to one O(3), two equivalent O(1), and three equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Rb(1), one Mg(1), one Mn(1), and two equivalent Mn(2) atoms to form distorted corner-sharing ORbMgMn3 trigonal pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and three equivalent Mn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbMgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.539
_cell_length_b   7.658
_cell_length_c   7.539
_cell_angle_alpha   92.224
_cell_angle_beta   156.094
_cell_angle_gamma   92.617
_symmetry_Int_Tables_number   1
_cell_volume   172.700
_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
  Rb  Rb0  1  0.500  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.500  0.500  1.0
  Mn  Mn2  1  0.814  0.161  0.347  1.0
  Mn  Mn3  1  0.337  0.505  0.167  1.0
  Mn  Mn4  1  0.663  0.495  0.833  1.0
  Mn  Mn5  1  0.186  0.839  0.653  1.0
  O  O6  1  0.815  0.351  0.536  1.0
  O  O7  1  0.807  0.970  0.164  1.0
  O  O8  1  0.526  0.659  0.134  1.0
  O  O9  1  0.157  0.369  0.212  1.0
  O  O10  1  0.843  0.631  0.788  1.0
  O  O11  1  0.474  0.341  0.866  1.0
  O  O12  1  0.193  0.030  0.836  1.0
  O  O13  1  0.185  0.649  0.464  1.0
[/CIF]
.