The material described by EuZn2Ge2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Eu(1) and four equivalent Ge(2) atoms to form distorted ZnEu4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)Eu4Zn4 tetrahedra, edges with two equivalent Ge(1)Eu4Zn4 tetrahedra, edges with four equivalent Zn(1)Eu4Ge4 tetrahedra, and faces with four equivalent Zn(1)Eu4Ge4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Eu(1) and four equivalent Zn(2) atoms to form distorted GeEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(1)Eu4Ge4 tetrahedra, edges with two equivalent Zn(1)Eu4Ge4 tetrahedra, edges with four equivalent Ge(1)Eu4Zn4 tetrahedra, and faces with four equivalent Ge(1)Eu4Zn4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(2), and four equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Eu(ZnGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.317
_cell_length_b   4.317
_cell_length_c   10.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   195.897
_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  0.250  1.0
  Eu  Eu1  1  0.250  0.250  0.750  1.0
  Zn  Zn2  1  0.250  0.750  0.500  1.0
  Zn  Zn3  1  0.750  0.250  0.500  1.0
  Zn  Zn4  1  0.250  0.250  0.133  1.0
  Zn  Zn5  1  0.750  0.750  0.867  1.0
  Ge  Ge6  1  0.750  0.250  0.000  1.0
  Ge  Ge7  1  0.250  0.750  0.000  1.0
  Ge  Ge8  1  0.250  0.250  0.365  1.0
  Ge  Ge9  1  0.750  0.750  0.635  1.0
[/CIF]
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The material described by EuZn2Ge2 crystallizes in the tetragonal P4/nmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Zn(1), four equivalent Zn(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Eu(1) and four equivalent Ge(2) atoms to form distorted ZnEu4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)Eu4Zn4 tetrahedra, edges with two equivalent Ge(1)Eu4Zn4 tetrahedra, edges with four equivalent Zn(1)Eu4Ge4 tetrahedra, and faces with four equivalent Zn(1)Eu4Ge4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent Eu(1) and four equivalent Zn(2) atoms to form distorted GeEu4Zn4 tetrahedra that share corners with twelve equivalent Zn(1)Eu4Ge4 tetrahedra, edges with two equivalent Zn(1)Eu4Ge4 tetrahedra, edges with four equivalent Ge(1)Eu4Zn4 tetrahedra, and faces with four equivalent Ge(1)Eu4Zn4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), one Zn(2), and four equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Eu(ZnGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.317
_cell_length_b   4.317
_cell_length_c   10.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   195.897
_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  0.250  1.0
  Eu  Eu1  1  0.250  0.250  0.750  1.0
  Zn  Zn2  1  0.250  0.750  0.500  1.0
  Zn  Zn3  1  0.750  0.250  0.500  1.0
  Zn  Zn4  1  0.250  0.250  0.133  1.0
  Zn  Zn5  1  0.750  0.750  0.867  1.0
  Ge  Ge6  1  0.750  0.250  0.000  1.0
  Ge  Ge7  1  0.250  0.750  0.000  1.0
  Ge  Ge8  1  0.250  0.250  0.365  1.0
  Ge  Ge9  1  0.750  0.750  0.635  1.0
[/CIF]
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