The crystal structure described by K2Mg(CoO2)2 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second K site, K(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. Mg(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second Co site, Co(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Mg(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), one Mg(1), one Co(1), and one Co(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mg(1), and one Co(2) atom. is represented by the CIF card [CIF]
data_K2Mg(CoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.810
_cell_length_b   6.206
_cell_length_c   6.129
_cell_angle_alpha   95.000
_cell_angle_beta   129.313
_cell_angle_gamma   109.522
_symmetry_Int_Tables_number   1
_cell_volume   172.315
_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
  K  K0  1  0.595  0.292  0.619  1.0
  K  K1  1  0.160  0.607  0.550  1.0
  Mg  Mg2  1  0.028  0.053  0.723  1.0
  Co  Co3  1  0.339  0.700  0.186  1.0
  Co  Co4  1  0.918  0.903  0.052  1.0
  O  O5  1  0.147  0.401  0.895  1.0
  O  O6  1  0.224  0.938  0.061  1.0
  O  O7  1  0.651  0.848  0.630  1.0
  O  O8  1  0.033  0.973  0.415  1.0
[/CIF]
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The crystal structure described by K2Mg(CoO2)2 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second K site, K(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. Mg(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second Co site, Co(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Mg(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Mg(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one K(2), one Mg(1), one Co(1), and one Co(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mg(1), and one Co(2) atom. is represented by the CIF card [CIF]
data_K2Mg(CoO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.810
_cell_length_b   6.206
_cell_length_c   6.129
_cell_angle_alpha   95.000
_cell_angle_beta   129.313
_cell_angle_gamma   109.522
_symmetry_Int_Tables_number   1
_cell_volume   172.315
_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
  K  K0  1  0.595  0.292  0.619  1.0
  K  K1  1  0.160  0.607  0.550  1.0
  Mg  Mg2  1  0.028  0.053  0.723  1.0
  Co  Co3  1  0.339  0.700  0.186  1.0
  Co  Co4  1  0.918  0.903  0.052  1.0
  O  O5  1  0.147  0.401  0.895  1.0
  O  O6  1  0.224  0.938  0.061  1.0
  O  O7  1  0.651  0.848  0.630  1.0
  O  O8  1  0.033  0.973  0.415  1.0
[/CIF]
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