The crystal structure described by K2La4O7 crystallizes in the trigonal P-31m space group. K(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(2) and three equivalent O(1) atoms to form LaO4 trigonal pyramids that share corners with six equivalent La(2)O6 octahedra and  a cornercorner with one La(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 64°. In the second La site, La(2) is bonded to six equivalent O(1) atoms to form LaO6 octahedra that share corners with six equivalent La(1)O4 trigonal pyramids and edges with three equivalent La(2)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent K(1), one La(1), and two equivalent La(2) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent La(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2La4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.380
_cell_length_b   6.380
_cell_length_c   7.749
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   273.146
_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  0.333  0.667  0.000  1.0
  K  K1  1  0.667  0.333  0.000  1.0
  La  La2  1  0.000  0.000  0.277  1.0
  La  La3  1  0.000  0.000  0.723  1.0
  La  La4  1  0.333  0.667  0.500  1.0
  La  La5  1  0.667  0.333  0.500  1.0
  O  O6  1  0.000  0.638  0.325  1.0
  O  O7  1  0.000  0.362  0.675  1.0
  O  O8  1  0.000  0.000  0.000  1.0
  O  O9  1  0.362  0.362  0.325  1.0
  O  O10  1  0.638  0.638  0.675  1.0
  O  O11  1  0.362  0.000  0.675  1.0
  O  O12  1  0.638  0.000  0.325  1.0
[/CIF]
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The crystal structure described by K2La4O7 crystallizes in the trigonal P-31m space group. K(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(2) and three equivalent O(1) atoms to form LaO4 trigonal pyramids that share corners with six equivalent La(2)O6 octahedra and  a cornercorner with one La(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 64°. In the second La site, La(2) is bonded to six equivalent O(1) atoms to form LaO6 octahedra that share corners with six equivalent La(1)O4 trigonal pyramids and edges with three equivalent La(2)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent K(1), one La(1), and two equivalent La(2) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent La(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2La4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.380
_cell_length_b   6.380
_cell_length_c   7.749
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   273.146
_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  0.333  0.667  0.000  1.0
  K  K1  1  0.667  0.333  0.000  1.0
  La  La2  1  0.000  0.000  0.277  1.0
  La  La3  1  0.000  0.000  0.723  1.0
  La  La4  1  0.333  0.667  0.500  1.0
  La  La5  1  0.667  0.333  0.500  1.0
  O  O6  1  0.000  0.638  0.325  1.0
  O  O7  1  0.000  0.362  0.675  1.0
  O  O8  1  0.000  0.000  0.000  1.0
  O  O9  1  0.362  0.362  0.325  1.0
  O  O10  1  0.638  0.638  0.675  1.0
  O  O11  1  0.362  0.000  0.675  1.0
  O  O12  1  0.638  0.000  0.325  1.0
[/CIF]
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