The structure described by EuNi9Ge4 crystallizes in the tetragonal I4/mcm space group. Eu(1) is bonded in a 24-coordinate geometry to eight equivalent Ni(1), eight equivalent Ni(3), and eight equivalent Ge(1) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(1), one Ni(2), four equivalent Ni(3), and four equivalent Ge(1) atoms. In the second Ni site, Ni(2) is bonded in a cuboctahedral geometry to four equivalent Ni(1), four equivalent Ni(3), and four equivalent Ge(1) atoms. In the third Ni site, Ni(3) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(2), three equivalent Ni(3), four equivalent Ni(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(2), two equivalent Ni(3), four equivalent Ni(1), and three equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_EuNi9Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.210
_cell_length_b   8.210
_cell_length_c   8.210
_cell_angle_alpha   118.225
_cell_angle_beta   118.225
_cell_angle_gamma   93.103
_symmetry_Int_Tables_number   1
_cell_volume   401.202
_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
  Eu  Eu0  1  0.750  0.750  0.000  1.0
  Eu  Eu1  1  0.250  0.250  0.000  1.0
  Ni  Ni2  1  0.300  0.800  0.864  1.0
  Ni  Ni3  1  0.700  0.200  0.136  1.0
  Ni  Ni4  1  0.935  0.435  0.136  1.0
  Ni  Ni5  1  0.800  0.935  0.500  1.0
  Ni  Ni6  1  0.565  0.700  0.500  1.0
  Ni  Ni7  1  0.065  0.565  0.864  1.0
  Ni  Ni8  1  0.200  0.065  0.500  1.0
  Ni  Ni9  1  0.435  0.300  0.500  1.0
  Ni  Ni10  1  0.000  0.500  0.500  1.0
  Ni  Ni11  1  0.500  0.000  0.500  1.0
  Ni  Ni12  1  0.794  0.294  0.729  1.0
  Ni  Ni13  1  0.206  0.706  0.271  1.0
  Ni  Ni14  1  0.566  0.066  0.271  1.0
  Ni  Ni15  1  0.294  0.566  0.500  1.0
  Ni  Ni16  1  0.934  0.206  0.500  1.0
  Ni  Ni17  1  0.434  0.934  0.729  1.0
  Ni  Ni18  1  0.706  0.434  0.500  1.0
  Ni  Ni19  1  0.066  0.794  0.500  1.0
  Ge  Ge20  1  0.718  0.556  0.274  1.0
  Ge  Ge21  1  0.282  0.444  0.726  1.0
  Ge  Ge22  1  0.556  0.282  0.838  1.0
  Ge  Ge23  1  0.218  0.944  0.162  1.0
  Ge  Ge24  1  0.444  0.718  0.162  1.0
  Ge  Ge25  1  0.782  0.056  0.838  1.0
  Ge  Ge26  1  0.056  0.218  0.274  1.0
  Ge  Ge27  1  0.944  0.782  0.726  1.0
[/CIF]
.
The structure described by EuNi9Ge4 crystallizes in the tetragonal I4/mcm space group. Eu(1) is bonded in a 24-coordinate geometry to eight equivalent Ni(1), eight equivalent Ni(3), and eight equivalent Ge(1) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(1), one Ni(2), four equivalent Ni(3), and four equivalent Ge(1) atoms. In the second Ni site, Ni(2) is bonded in a cuboctahedral geometry to four equivalent Ni(1), four equivalent Ni(3), and four equivalent Ge(1) atoms. In the third Ni site, Ni(3) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(2), three equivalent Ni(3), four equivalent Ni(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 12-coordinate geometry to two equivalent Eu(1), one Ni(2), two equivalent Ni(3), four equivalent Ni(1), and three equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_EuNi9Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.210
_cell_length_b   8.210
_cell_length_c   8.210
_cell_angle_alpha   118.225
_cell_angle_beta   118.225
_cell_angle_gamma   93.103
_symmetry_Int_Tables_number   1
_cell_volume   401.202
_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
  Eu  Eu0  1  0.750  0.750  0.000  1.0
  Eu  Eu1  1  0.250  0.250  0.000  1.0
  Ni  Ni2  1  0.300  0.800  0.864  1.0
  Ni  Ni3  1  0.700  0.200  0.136  1.0
  Ni  Ni4  1  0.935  0.435  0.136  1.0
  Ni  Ni5  1  0.800  0.935  0.500  1.0
  Ni  Ni6  1  0.565  0.700  0.500  1.0
  Ni  Ni7  1  0.065  0.565  0.864  1.0
  Ni  Ni8  1  0.200  0.065  0.500  1.0
  Ni  Ni9  1  0.435  0.300  0.500  1.0
  Ni  Ni10  1  0.000  0.500  0.500  1.0
  Ni  Ni11  1  0.500  0.000  0.500  1.0
  Ni  Ni12  1  0.794  0.294  0.729  1.0
  Ni  Ni13  1  0.206  0.706  0.271  1.0
  Ni  Ni14  1  0.566  0.066  0.271  1.0
  Ni  Ni15  1  0.294  0.566  0.500  1.0
  Ni  Ni16  1  0.934  0.206  0.500  1.0
  Ni  Ni17  1  0.434  0.934  0.729  1.0
  Ni  Ni18  1  0.706  0.434  0.500  1.0
  Ni  Ni19  1  0.066  0.794  0.500  1.0
  Ge  Ge20  1  0.718  0.556  0.274  1.0
  Ge  Ge21  1  0.282  0.444  0.726  1.0
  Ge  Ge22  1  0.556  0.282  0.838  1.0
  Ge  Ge23  1  0.218  0.944  0.162  1.0
  Ge  Ge24  1  0.444  0.718  0.162  1.0
  Ge  Ge25  1  0.782  0.056  0.838  1.0
  Ge  Ge26  1  0.056  0.218  0.274  1.0
  Ge  Ge27  1  0.944  0.782  0.726  1.0
[/CIF]
.