The material described by EuNd(GeO3)4 crystallizes in the tetragonal P4/mmm space group. Eu(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra, corners with eight equivalent Nd(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Nd(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form NdO12 cuboctahedra that share corners with four equivalent Nd(1)O12 cuboctahedra, corners with eight equivalent Eu(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Nd(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Eu(1), one Nd(1), and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Eu(1) and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Nd(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_NdEu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.757
_cell_length_b   6.757
_cell_length_c   9.525
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   434.875
_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
  Nd  Nd0  1  0.000  0.000  0.000  1.0
  Eu  Eu1  1  0.500  0.500  0.500  1.0
  Ge  Ge2  1  0.000  0.500  0.745  1.0
  Ge  Ge3  1  0.000  0.500  0.255  1.0
  Ge  Ge4  1  0.500  0.000  0.745  1.0
  Ge  Ge5  1  0.500  0.000  0.255  1.0
  O  O6  1  0.246  0.246  0.753  1.0
  O  O7  1  0.246  0.246  0.247  1.0
  O  O8  1  0.754  0.754  0.247  1.0
  O  O9  1  0.754  0.754  0.753  1.0
  O  O10  1  0.754  0.246  0.753  1.0
  O  O11  1  0.754  0.246  0.247  1.0
  O  O12  1  0.246  0.754  0.247  1.0
  O  O13  1  0.246  0.754  0.753  1.0
  O  O14  1  0.000  0.500  0.500  1.0
  O  O15  1  0.000  0.500  0.000  1.0
  O  O16  1  0.500  0.000  0.500  1.0
  O  O17  1  0.500  0.000  0.000  1.0
[/CIF]
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The material described by EuNd(GeO3)4 crystallizes in the tetragonal P4/mmm space group. Eu(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form distorted EuO12 cuboctahedra that share corners with four equivalent Eu(1)O12 cuboctahedra, corners with eight equivalent Nd(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Nd(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form NdO12 cuboctahedra that share corners with four equivalent Nd(1)O12 cuboctahedra, corners with eight equivalent Eu(1)O12 cuboctahedra, and faces with eight equivalent Ge(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra, faces with two equivalent Eu(1)O12 cuboctahedra, and faces with two equivalent Nd(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Eu(1), one Nd(1), and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Eu(1) and two equivalent Ge(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Nd(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_NdEu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.757
_cell_length_b   6.757
_cell_length_c   9.525
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   434.875
_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
  Nd  Nd0  1  0.000  0.000  0.000  1.0
  Eu  Eu1  1  0.500  0.500  0.500  1.0
  Ge  Ge2  1  0.000  0.500  0.745  1.0
  Ge  Ge3  1  0.000  0.500  0.255  1.0
  Ge  Ge4  1  0.500  0.000  0.745  1.0
  Ge  Ge5  1  0.500  0.000  0.255  1.0
  O  O6  1  0.246  0.246  0.753  1.0
  O  O7  1  0.246  0.246  0.247  1.0
  O  O8  1  0.754  0.754  0.247  1.0
  O  O9  1  0.754  0.754  0.753  1.0
  O  O10  1  0.754  0.246  0.753  1.0
  O  O11  1  0.754  0.246  0.247  1.0
  O  O12  1  0.246  0.754  0.247  1.0
  O  O13  1  0.246  0.754  0.753  1.0
  O  O14  1  0.000  0.500  0.500  1.0
  O  O15  1  0.000  0.500  0.000  1.0
  O  O16  1  0.500  0.000  0.500  1.0
  O  O17  1  0.500  0.000  0.000  1.0
[/CIF]
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