The compound described by K4Al2O crystallizes in the cubic Fd-3m space group. K(1) is bonded in a distorted single-bond geometry to three equivalent Al(1) and one O(1) atom. Al(1) is bonded to six equivalent K(1) atoms to form distorted AlK6 octahedra that share edges with six equivalent Al(1)K6 octahedra and faces with two equivalent O(1)K4 tetrahedra. O(1) is bonded to four equivalent K(1) atoms to form OK4 tetrahedra that share faces with four equivalent Al(1)K6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4Al2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.120
_cell_length_b   9.120
_cell_length_c   9.120
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   536.327
_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
  K  K0  1  0.378  0.378  0.378  1.0
  K  K1  1  0.378  0.378  0.866  1.0
  K  K2  1  0.378  0.866  0.378  1.0
  K  K3  1  0.872  0.872  0.384  1.0
  K  K4  1  0.872  0.872  0.872  1.0
  K  K5  1  0.866  0.378  0.378  1.0
  K  K6  1  0.872  0.384  0.872  1.0
  K  K7  1  0.384  0.872  0.872  1.0
  Al  Al8  1  0.125  0.125  0.125  1.0
  Al  Al9  1  0.125  0.125  0.625  1.0
  Al  Al10  1  0.125  0.625  0.125  1.0
  Al  Al11  1  0.625  0.125  0.125  1.0
  O  O12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.250  0.250  0.250  1.0
[/CIF]
.
The compound described by K4Al2O crystallizes in the cubic Fd-3m space group. K(1) is bonded in a distorted single-bond geometry to three equivalent Al(1) and one O(1) atom. Al(1) is bonded to six equivalent K(1) atoms to form distorted AlK6 octahedra that share edges with six equivalent Al(1)K6 octahedra and faces with two equivalent O(1)K4 tetrahedra. O(1) is bonded to four equivalent K(1) atoms to form OK4 tetrahedra that share faces with four equivalent Al(1)K6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4Al2O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.120
_cell_length_b   9.120
_cell_length_c   9.120
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   536.327
_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
  K  K0  1  0.378  0.378  0.378  1.0
  K  K1  1  0.378  0.378  0.866  1.0
  K  K2  1  0.378  0.866  0.378  1.0
  K  K3  1  0.872  0.872  0.384  1.0
  K  K4  1  0.872  0.872  0.872  1.0
  K  K5  1  0.866  0.378  0.378  1.0
  K  K6  1  0.872  0.384  0.872  1.0
  K  K7  1  0.384  0.872  0.872  1.0
  Al  Al8  1  0.125  0.125  0.125  1.0
  Al  Al9  1  0.125  0.125  0.625  1.0
  Al  Al10  1  0.125  0.625  0.125  1.0
  Al  Al11  1  0.625  0.125  0.125  1.0
  O  O12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.250  0.250  0.250  1.0
[/CIF]
.