The material structure described by RbMgMn4O8 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. Mg(1) is bonded to one O(3), two equivalent O(5), and two equivalent O(7) atoms to form distorted MgO5 square pyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, and edges with two equivalent Mg(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 10-55°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), two equivalent O(6), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mg(1)O5 square pyramids, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-50°. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. In the third Mn site, Mn(3) is bonded to one O(5), one O(6), two equivalent O(4), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mg(1)O5 square pyramids, and edges with two equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fourth Mn site, Mn(4) is bonded in a 6-coordinate geometry to one O(7), one O(8), two equivalent O(2), and two equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Mn(1), and two equivalent Mn(2) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Mn(1), and two equivalent Mn(4) atoms. In the third O site, O(3) is bonded to one Mg(1), one Mn(2), and two equivalent Mn(4) atoms to form corner-sharing OMgMn3 trigonal pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Mn(2), and two equivalent Mn(3) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(3), and two equivalent Mn(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(1) atoms. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(4), and two equivalent Mn(1) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(3) atoms. is represented by the CIF file [CIF]
data_RbMgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.586
_cell_length_b   7.537
_cell_length_c   7.640
_cell_angle_alpha   82.156
_cell_angle_beta   157.134
_cell_angle_gamma   100.893
_symmetry_Int_Tables_number   1
_cell_volume   165.877
_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  0.550  0.082  0.612  1.0
  Mg  Mg1  1  0.502  0.834  0.285  1.0
  Mn  Mn2  1  0.828  0.185  0.356  1.0
  Mn  Mn3  1  0.289  0.476  0.088  1.0
  Mn  Mn4  1  0.699  0.513  0.867  1.0
  Mn  Mn5  1  0.180  0.807  0.630  1.0
  O  O6  1  0.747  0.332  0.477  1.0
  O  O7  1  0.798  0.975  0.166  1.0
  O  O8  1  0.549  0.677  0.136  1.0
  O  O9  1  0.193  0.384  0.259  1.0
  O  O10  1  0.903  0.659  0.809  1.0
  O  O11  1  0.484  0.318  0.870  1.0
  O  O12  1  0.096  0.006  0.782  1.0
  O  O13  1  0.209  0.654  0.449  1.0
[/CIF]
.
The material structure described by RbMgMn4O8 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(4) atoms. Mg(1) is bonded to one O(3), two equivalent O(5), and two equivalent O(7) atoms to form distorted MgO5 square pyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra,  an edgeedge with one Mn(1)O6 octahedra, and edges with two equivalent Mg(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 10-55°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), two equivalent O(6), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mg(1)O5 square pyramids, edges with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 square pyramid. The corner-sharing octahedral tilt angles range from 48-50°. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. In the third Mn site, Mn(3) is bonded to one O(5), one O(6), two equivalent O(4), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mg(1)O5 square pyramids, and edges with two equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fourth Mn site, Mn(4) is bonded in a 6-coordinate geometry to one O(7), one O(8), two equivalent O(2), and two equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Mn(1), and two equivalent Mn(2) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Mn(1), and two equivalent Mn(4) atoms. In the third O site, O(3) is bonded to one Mg(1), one Mn(2), and two equivalent Mn(4) atoms to form corner-sharing OMgMn3 trigonal pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Mn(2), and two equivalent Mn(3) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(3), and two equivalent Mn(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(1) atoms. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(4), and two equivalent Mn(1) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(3) atoms. is represented by the CIF file [CIF]
data_RbMgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.586
_cell_length_b   7.537
_cell_length_c   7.640
_cell_angle_alpha   82.156
_cell_angle_beta   157.134
_cell_angle_gamma   100.893
_symmetry_Int_Tables_number   1
_cell_volume   165.877
_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  0.550  0.082  0.612  1.0
  Mg  Mg1  1  0.502  0.834  0.285  1.0
  Mn  Mn2  1  0.828  0.185  0.356  1.0
  Mn  Mn3  1  0.289  0.476  0.088  1.0
  Mn  Mn4  1  0.699  0.513  0.867  1.0
  Mn  Mn5  1  0.180  0.807  0.630  1.0
  O  O6  1  0.747  0.332  0.477  1.0
  O  O7  1  0.798  0.975  0.166  1.0
  O  O8  1  0.549  0.677  0.136  1.0
  O  O9  1  0.193  0.384  0.259  1.0
  O  O10  1  0.903  0.659  0.809  1.0
  O  O11  1  0.484  0.318  0.870  1.0
  O  O12  1  0.096  0.006  0.782  1.0
  O  O13  1  0.209  0.654  0.449  1.0
[/CIF]
.