The compound described by Ce4Ge7 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to two equivalent Ge(4), two equivalent Ge(6), and four equivalent Ge(1) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Ge(3), two equivalent Ge(7), four equivalent Ge(2), and four equivalent Ge(5) atoms to form a mixture of edge and face-sharing CeGe12 cuboctahedra. In the third Ce site, Ce(3) is bonded in a 10-coordinate geometry to two equivalent Ge(2), four equivalent Ge(3), and four equivalent Ge(6) atoms. In the fourth Ce site, Ce(4) is bonded to two equivalent Ge(1), two equivalent Ge(5), four equivalent Ge(4), and four equivalent Ge(7) atoms to form a mixture of distorted edge and face-sharing CeGe12 cuboctahedra. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Ce(4), four equivalent Ce(1), and two equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ce(3), four equivalent Ce(2), one Ge(5), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(3), one Ge(6), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(4), one Ge(7), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Ce(4), four equivalent Ce(2), one Ge(2), and two equivalent Ge(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to two equivalent Ce(1), four equivalent Ce(3), and one Ge(3) atom. In the seventh Ge site, Ge(7) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(4), one Ge(4), and two equivalent Ge(5) atoms. is represented by the CIF file [CIF]
data_Ce4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.091
_cell_length_b   4.204
_cell_length_c   15.036
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.572
_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
  Ce  Ce0  1  0.250  0.000  0.377  1.0
  Ce  Ce1  1  0.750  0.500  0.877  1.0
  Ce  Ce2  1  0.250  0.500  0.126  1.0
  Ce  Ce3  1  0.750  0.000  0.623  1.0
  Ge  Ge4  1  0.750  0.500  0.433  1.0
  Ge  Ge5  1  0.250  0.000  0.962  1.0
  Ge  Ge6  1  0.750  0.000  0.058  1.0
  Ge  Ge7  1  0.250  0.500  0.537  1.0
  Ge  Ge8  1  0.250  0.000  0.793  1.0
  Ge  Ge9  1  0.750  0.000  0.224  1.0
  Ge  Ge10  1  0.250  0.500  0.705  1.0
[/CIF]
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The compound described by Ce4Ge7 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to two equivalent Ge(4), two equivalent Ge(6), and four equivalent Ge(1) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Ge(3), two equivalent Ge(7), four equivalent Ge(2), and four equivalent Ge(5) atoms to form a mixture of edge and face-sharing CeGe12 cuboctahedra. In the third Ce site, Ce(3) is bonded in a 10-coordinate geometry to two equivalent Ge(2), four equivalent Ge(3), and four equivalent Ge(6) atoms. In the fourth Ce site, Ce(4) is bonded to two equivalent Ge(1), two equivalent Ge(5), four equivalent Ge(4), and four equivalent Ge(7) atoms to form a mixture of distorted edge and face-sharing CeGe12 cuboctahedra. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Ce(4), four equivalent Ce(1), and two equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ce(3), four equivalent Ce(2), one Ge(5), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(3), one Ge(6), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(4), one Ge(7), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to two equivalent Ce(4), four equivalent Ce(2), one Ge(2), and two equivalent Ge(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to two equivalent Ce(1), four equivalent Ce(3), and one Ge(3) atom. In the seventh Ge site, Ge(7) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(4), one Ge(4), and two equivalent Ge(5) atoms. is represented by the CIF file [CIF]
data_Ce4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.091
_cell_length_b   4.204
_cell_length_c   15.036
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.572
_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
  Ce  Ce0  1  0.250  0.000  0.377  1.0
  Ce  Ce1  1  0.750  0.500  0.877  1.0
  Ce  Ce2  1  0.250  0.500  0.126  1.0
  Ce  Ce3  1  0.750  0.000  0.623  1.0
  Ge  Ge4  1  0.750  0.500  0.433  1.0
  Ge  Ge5  1  0.250  0.000  0.962  1.0
  Ge  Ge6  1  0.750  0.000  0.058  1.0
  Ge  Ge7  1  0.250  0.500  0.537  1.0
  Ge  Ge8  1  0.250  0.000  0.793  1.0
  Ge  Ge9  1  0.750  0.000  0.224  1.0
  Ge  Ge10  1  0.250  0.500  0.705  1.0
[/CIF]
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