The crystal structure described by Er4Zn5Ge6 crystallizes in the orthorhombic Cmc2_1 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a 10-coordinate geometry to one Zn(4), two equivalent Zn(3), one Ge(6), two equivalent Ge(2), two equivalent Ge(4), and two equivalent Ge(5) atoms. In the second Er site, Er(2) is bonded to one Ge(1), one Ge(6), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted ErGe6 octahedra that share  a cornercorner with one Er(3)Ge6 octahedra,  a cornercorner with one Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, edges with two equivalent Er(3)Ge6 octahedra, and edges with two equivalent Zn(2)Ge4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the third Er site, Er(3) is bonded to one Ge(3), one Ge(6), two equivalent Ge(1), and two equivalent Ge(4) atoms to form distorted ErGe6 octahedra that share  a cornercorner with one Er(2)Ge6 octahedra,  a cornercorner with one Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, edges with two equivalent Er(3)Ge6 octahedra, and edges with two equivalent Zn(2)Ge4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the fourth Er site, Er(4) is bonded in a 11-coordinate geometry to one Zn(4), two equivalent Zn(1), two equivalent Zn(5), two equivalent Ge(2), two equivalent Ge(4), and two equivalent Ge(5) atoms. There are five inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to two equivalent Er(4), one Ge(2), one Ge(5), and two equivalent Ge(1) atoms. In the second Zn site, Zn(2) is bonded to one Ge(1), one Ge(3), and two equivalent Ge(6) atoms to form distorted ZnGe4 tetrahedra that share  a cornercorner with one Er(2)Ge6 octahedra,  a cornercorner with one Er(3)Ge6 octahedra, corners with two equivalent Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, and edges with two equivalent Er(3)Ge6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent Er(1), one Ge(4), one Ge(5), and two equivalent Ge(3) atoms. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to one Er(1), one Er(4), one Ge(1), one Ge(3), and two equivalent Ge(5) atoms. In the fifth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Er(4), one Ge(4), one Ge(5), and two equivalent Ge(6) atoms. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Er(2), two equivalent Er(3), one Zn(2), one Zn(4), and two equivalent Zn(1) atoms to form distorted edge-sharing GeEr3Zn4 pentagonal bipyramids. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Er(1), two equivalent Er(2), two equivalent Er(4), one Zn(1), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded to one Er(3), two equivalent Er(2), one Zn(2), one Zn(4), and two equivalent Zn(3) atoms to form distorted edge-sharing GeEr3Zn4 pentagonal bipyramids. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(3), two equivalent Er(4), one Zn(3), one Zn(5), and one Ge(2) atom. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(4), one Zn(1), one Zn(3), one Zn(5), and two equivalent Zn(4) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to one Er(1), one Er(2), one Er(3), two equivalent Zn(2), and two equivalent Zn(5) atoms. is represented by the CIF card [CIF]
data_Er4Zn5Ge6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.559
_cell_length_b   9.559
_cell_length_c   15.267
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   154.431
_symmetry_Int_Tables_number   1
_cell_volume   602.110
_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
  Er  Er0  1  0.018  0.982  0.764  1.0
  Er  Er1  1  0.982  0.018  0.264  1.0
  Er  Er2  1  0.175  0.825  0.319  1.0
  Er  Er3  1  0.825  0.175  0.819  1.0
  Er  Er4  1  0.167  0.833  0.960  1.0
  Er  Er5  1  0.833  0.167  0.460  1.0
  Er  Er6  1  0.033  0.967  0.500  1.0
  Er  Er7  1  0.967  0.033  1.000  1.0
  Zn  Zn8  1  0.344  0.656  0.990  1.0
  Zn  Zn9  1  0.656  0.344  0.490  1.0
  Zn  Zn10  1  0.301  0.699  0.639  1.0
  Zn  Zn11  1  0.699  0.301  0.139  1.0
  Zn  Zn12  1  0.650  0.350  0.782  1.0
  Zn  Zn13  1  0.350  0.650  0.282  1.0
  Zn  Zn14  1  0.152  0.848  0.636  1.0
  Zn  Zn15  1  0.848  0.152  0.136  1.0
  Zn  Zn16  1  0.435  0.565  0.579  1.0
  Zn  Zn17  1  0.565  0.435  0.079  1.0
  Ge  Ge18  1  0.229  0.771  0.498  1.0
  Ge  Ge19  1  0.771  0.229  0.998  1.0
  Ge  Ge20  1  0.431  0.569  0.856  1.0
  Ge  Ge21  1  0.569  0.431  0.356  1.0
  Ge  Ge22  1  0.224  0.776  0.778  1.0
  Ge  Ge23  1  0.776  0.224  0.278  1.0
  Ge  Ge24  1  0.560  0.440  0.909  1.0
  Ge  Ge25  1  0.440  0.560  0.409  1.0
  Ge  Ge26  1  0.567  0.433  0.634  1.0
  Ge  Ge27  1  0.433  0.567  0.134  1.0
  Ge  Ge28  1  0.113  0.887  0.146  1.0
  Ge  Ge29  1  0.887  0.113  0.646  1.0
[/CIF]
.
The crystal structure described by Er4Zn5Ge6 crystallizes in the orthorhombic Cmc2_1 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a 10-coordinate geometry to one Zn(4), two equivalent Zn(3), one Ge(6), two equivalent Ge(2), two equivalent Ge(4), and two equivalent Ge(5) atoms. In the second Er site, Er(2) is bonded to one Ge(1), one Ge(6), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted ErGe6 octahedra that share  a cornercorner with one Er(3)Ge6 octahedra,  a cornercorner with one Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, edges with two equivalent Er(3)Ge6 octahedra, and edges with two equivalent Zn(2)Ge4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the third Er site, Er(3) is bonded to one Ge(3), one Ge(6), two equivalent Ge(1), and two equivalent Ge(4) atoms to form distorted ErGe6 octahedra that share  a cornercorner with one Er(2)Ge6 octahedra,  a cornercorner with one Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, edges with two equivalent Er(3)Ge6 octahedra, and edges with two equivalent Zn(2)Ge4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. In the fourth Er site, Er(4) is bonded in a 11-coordinate geometry to one Zn(4), two equivalent Zn(1), two equivalent Zn(5), two equivalent Ge(2), two equivalent Ge(4), and two equivalent Ge(5) atoms. There are five inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to two equivalent Er(4), one Ge(2), one Ge(5), and two equivalent Ge(1) atoms. In the second Zn site, Zn(2) is bonded to one Ge(1), one Ge(3), and two equivalent Ge(6) atoms to form distorted ZnGe4 tetrahedra that share  a cornercorner with one Er(2)Ge6 octahedra,  a cornercorner with one Er(3)Ge6 octahedra, corners with two equivalent Zn(2)Ge4 tetrahedra, edges with two equivalent Er(2)Ge6 octahedra, and edges with two equivalent Er(3)Ge6 octahedra. The corner-sharing octahedral tilt angles range from 12-13°. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent Er(1), one Ge(4), one Ge(5), and two equivalent Ge(3) atoms. In the fourth Zn site, Zn(4) is bonded in a 4-coordinate geometry to one Er(1), one Er(4), one Ge(1), one Ge(3), and two equivalent Ge(5) atoms. In the fifth Zn site, Zn(5) is bonded in a 4-coordinate geometry to two equivalent Er(4), one Ge(4), one Ge(5), and two equivalent Ge(6) atoms. There are six inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Er(2), two equivalent Er(3), one Zn(2), one Zn(4), and two equivalent Zn(1) atoms to form distorted edge-sharing GeEr3Zn4 pentagonal bipyramids. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Er(1), two equivalent Er(2), two equivalent Er(4), one Zn(1), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded to one Er(3), two equivalent Er(2), one Zn(2), one Zn(4), and two equivalent Zn(3) atoms to form distorted edge-sharing GeEr3Zn4 pentagonal bipyramids. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(3), two equivalent Er(4), one Zn(3), one Zn(5), and one Ge(2) atom. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Er(1), two equivalent Er(4), one Zn(1), one Zn(3), one Zn(5), and two equivalent Zn(4) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to one Er(1), one Er(2), one Er(3), two equivalent Zn(2), and two equivalent Zn(5) atoms. is represented by the CIF card [CIF]
data_Er4Zn5Ge6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.559
_cell_length_b   9.559
_cell_length_c   15.267
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   154.431
_symmetry_Int_Tables_number   1
_cell_volume   602.110
_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
  Er  Er0  1  0.018  0.982  0.764  1.0
  Er  Er1  1  0.982  0.018  0.264  1.0
  Er  Er2  1  0.175  0.825  0.319  1.0
  Er  Er3  1  0.825  0.175  0.819  1.0
  Er  Er4  1  0.167  0.833  0.960  1.0
  Er  Er5  1  0.833  0.167  0.460  1.0
  Er  Er6  1  0.033  0.967  0.500  1.0
  Er  Er7  1  0.967  0.033  1.000  1.0
  Zn  Zn8  1  0.344  0.656  0.990  1.0
  Zn  Zn9  1  0.656  0.344  0.490  1.0
  Zn  Zn10  1  0.301  0.699  0.639  1.0
  Zn  Zn11  1  0.699  0.301  0.139  1.0
  Zn  Zn12  1  0.650  0.350  0.782  1.0
  Zn  Zn13  1  0.350  0.650  0.282  1.0
  Zn  Zn14  1  0.152  0.848  0.636  1.0
  Zn  Zn15  1  0.848  0.152  0.136  1.0
  Zn  Zn16  1  0.435  0.565  0.579  1.0
  Zn  Zn17  1  0.565  0.435  0.079  1.0
  Ge  Ge18  1  0.229  0.771  0.498  1.0
  Ge  Ge19  1  0.771  0.229  0.998  1.0
  Ge  Ge20  1  0.431  0.569  0.856  1.0
  Ge  Ge21  1  0.569  0.431  0.356  1.0
  Ge  Ge22  1  0.224  0.776  0.778  1.0
  Ge  Ge23  1  0.776  0.224  0.278  1.0
  Ge  Ge24  1  0.560  0.440  0.909  1.0
  Ge  Ge25  1  0.440  0.560  0.409  1.0
  Ge  Ge26  1  0.567  0.433  0.634  1.0
  Ge  Ge27  1  0.433  0.567  0.134  1.0
  Ge  Ge28  1  0.113  0.887  0.146  1.0
  Ge  Ge29  1  0.887  0.113  0.646  1.0
[/CIF]
.