The material described by Rb4Mg(CoO3)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Mg(1), one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Mg(1) is bonded in a linear geometry to two equivalent Rb(1), one O(3), and one O(4) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the second Co site, Co(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Rb(1), one Mg(1), and one Co(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Mg(1), and one Co(2) atom. is represented by the CIF file [CIF]
data_Rb4Mg(CoO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.487
_cell_length_b   6.487
_cell_length_c   5.911
_cell_angle_alpha   93.065
_cell_angle_beta   93.065
_cell_angle_gamma   108.587
_symmetry_Int_Tables_number   1
_cell_volume   234.790
_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  0.106  0.490  0.773  1.0
  Rb  Rb1  1  0.512  0.887  0.231  1.0
  Rb  Rb2  1  0.490  0.106  0.773  1.0
  Rb  Rb3  1  0.887  0.512  0.231  1.0
  Mg  Mg4  1  0.482  0.482  0.494  1.0
  Co  Co5  1  0.075  0.075  0.243  1.0
  Co  Co6  1  0.926  0.926  0.734  1.0
  O  O7  1  0.119  0.875  0.992  1.0
  O  O8  1  0.128  0.885  0.492  1.0
  O  O9  1  0.329  0.329  0.236  1.0
  O  O10  1  0.671  0.671  0.709  1.0
  O  O11  1  0.875  0.119  0.992  1.0
  O  O12  1  0.885  0.128  0.492  1.0
[/CIF]
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The material described by Rb4Mg(CoO3)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one Mg(1), one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Mg(1) is bonded in a linear geometry to two equivalent Rb(1), one O(3), and one O(4) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the second Co site, Co(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Rb(1), one Mg(1), and one Co(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Mg(1), and one Co(2) atom. is represented by the CIF file [CIF]
data_Rb4Mg(CoO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.487
_cell_length_b   6.487
_cell_length_c   5.911
_cell_angle_alpha   93.065
_cell_angle_beta   93.065
_cell_angle_gamma   108.587
_symmetry_Int_Tables_number   1
_cell_volume   234.790
_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  0.106  0.490  0.773  1.0
  Rb  Rb1  1  0.512  0.887  0.231  1.0
  Rb  Rb2  1  0.490  0.106  0.773  1.0
  Rb  Rb3  1  0.887  0.512  0.231  1.0
  Mg  Mg4  1  0.482  0.482  0.494  1.0
  Co  Co5  1  0.075  0.075  0.243  1.0
  Co  Co6  1  0.926  0.926  0.734  1.0
  O  O7  1  0.119  0.875  0.992  1.0
  O  O8  1  0.128  0.885  0.492  1.0
  O  O9  1  0.329  0.329  0.236  1.0
  O  O10  1  0.671  0.671  0.709  1.0
  O  O11  1  0.875  0.119  0.992  1.0
  O  O12  1  0.885  0.128  0.492  1.0
[/CIF]
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