The material described by KEu(GeO3)4 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Eu(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Eu(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra, corners with eight equivalent K(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-19°. There are five 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 Eu(1), and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Eu(1), and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Eu(1), and two equivalent Ge(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Eu(1) and two equivalent Ge(1) atoms. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_KEu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.431
_cell_length_b   5.431
_cell_length_c   7.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.309
_symmetry_Int_Tables_number   1
_cell_volume   226.097
_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  0.995  0.995  0.500  1.0
  Eu  Eu1  1  0.516  0.516  0.000  1.0
  Ge  Ge2  1  0.494  0.010  0.743  1.0
  Ge  Ge3  1  0.494  0.010  0.257  1.0
  Ge  Ge4  1  0.010  0.494  0.257  1.0
  Ge  Ge5  1  0.010  0.494  0.743  1.0
  O  O6  1  0.746  0.252  0.779  1.0
  O  O7  1  0.252  0.746  0.779  1.0
  O  O8  1  0.252  0.746  0.221  1.0
  O  O9  1  0.746  0.252  0.221  1.0
  O  O10  1  0.714  0.714  0.761  1.0
  O  O11  1  0.271  0.271  0.778  1.0
  O  O12  1  0.271  0.271  0.222  1.0
  O  O13  1  0.714  0.714  0.239  1.0
  O  O14  1  0.515  0.983  0.000  1.0
  O  O15  1  0.491  0.024  0.500  1.0
  O  O16  1  0.983  0.515  0.000  1.0
  O  O17  1  0.024  0.491  0.500  1.0
[/CIF]
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The material described by KEu(GeO3)4 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms to form distorted KO12 cuboctahedra that share corners with four equivalent K(1)O12 cuboctahedra, corners with eight equivalent Eu(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Eu(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra, corners with eight equivalent K(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra, faces with two equivalent K(1)O12 cuboctahedra, and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 5-19°. There are five 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 Eu(1), and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one Eu(1), and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Eu(1), and two equivalent Ge(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Eu(1) and two equivalent Ge(1) atoms. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_KEu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.431
_cell_length_b   5.431
_cell_length_c   7.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.309
_symmetry_Int_Tables_number   1
_cell_volume   226.097
_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  0.995  0.995  0.500  1.0
  Eu  Eu1  1  0.516  0.516  0.000  1.0
  Ge  Ge2  1  0.494  0.010  0.743  1.0
  Ge  Ge3  1  0.494  0.010  0.257  1.0
  Ge  Ge4  1  0.010  0.494  0.257  1.0
  Ge  Ge5  1  0.010  0.494  0.743  1.0
  O  O6  1  0.746  0.252  0.779  1.0
  O  O7  1  0.252  0.746  0.779  1.0
  O  O8  1  0.252  0.746  0.221  1.0
  O  O9  1  0.746  0.252  0.221  1.0
  O  O10  1  0.714  0.714  0.761  1.0
  O  O11  1  0.271  0.271  0.778  1.0
  O  O12  1  0.271  0.271  0.222  1.0
  O  O13  1  0.714  0.714  0.239  1.0
  O  O14  1  0.515  0.983  0.000  1.0
  O  O15  1  0.491  0.024  0.500  1.0
  O  O16  1  0.983  0.515  0.000  1.0
  O  O17  1  0.024  0.491  0.500  1.0
[/CIF]
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