The material structure described by Nd2Ge9 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 13-coordinate geometry to one Ge(5), two equivalent Ge(2), four equivalent Ge(1), and six equivalent Ge(4) atoms. In the second Nd site, Nd(2) is bonded in a 13-coordinate geometry to one Ge(5), two equivalent Ge(1), four equivalent Ge(2), and six equivalent Ge(3) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Nd(2), two equivalent Nd(1), one Ge(3), two equivalent Ge(2), and two equivalent Ge(5) atoms. In the second Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Nd(1), two equivalent Nd(2), one Ge(2), one Ge(4), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to three equivalent Nd(2), one Ge(1), two equivalent Ge(3), and two equivalent Ge(5) atoms. In the fourth Ge site, Ge(4) is bonded in a 6-coordinate geometry to three equivalent Nd(1), one Ge(2), and two equivalent Ge(4) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to one Nd(1), one Nd(2), four equivalent Ge(1), and four equivalent Ge(3) atoms. is represented by the CIF card [CIF]
data_Nd2Ge9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.043
_cell_length_b   9.610
_cell_length_c   12.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   485.115
_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
  Nd  Nd0  1  0.500  0.500  0.871  1.0
  Nd  Nd1  1  0.000  0.000  0.129  1.0
  Nd  Nd2  1  0.500  0.500  0.382  1.0
  Nd  Nd3  1  0.000  0.000  0.618  1.0
  Ge  Ge4  1  0.500  0.811  0.267  1.0
  Ge  Ge5  1  0.500  0.189  0.267  1.0
  Ge  Ge6  1  0.000  0.689  0.733  1.0
  Ge  Ge7  1  0.000  0.311  0.733  1.0
  Ge  Ge8  1  0.500  0.846  0.782  1.0
  Ge  Ge9  1  0.500  0.154  0.782  1.0
  Ge  Ge10  1  0.000  0.654  0.218  1.0
  Ge  Ge11  1  0.000  0.346  0.218  1.0
  Ge  Ge12  1  0.500  0.832  0.472  1.0
  Ge  Ge13  1  0.500  0.168  0.472  1.0
  Ge  Ge14  1  0.000  0.668  0.528  1.0
  Ge  Ge15  1  0.000  0.332  0.528  1.0
  Ge  Ge16  1  0.500  0.828  0.981  1.0
  Ge  Ge17  1  0.500  0.172  0.981  1.0
  Ge  Ge18  1  0.000  0.672  0.019  1.0
  Ge  Ge19  1  0.000  0.328  0.019  1.0
  Ge  Ge20  1  0.500  0.500  0.627  1.0
  Ge  Ge21  1  0.000  0.000  0.373  1.0
[/CIF]
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The material structure described by Nd2Ge9 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 13-coordinate geometry to one Ge(5), two equivalent Ge(2), four equivalent Ge(1), and six equivalent Ge(4) atoms. In the second Nd site, Nd(2) is bonded in a 13-coordinate geometry to one Ge(5), two equivalent Ge(1), four equivalent Ge(2), and six equivalent Ge(3) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Nd(2), two equivalent Nd(1), one Ge(3), two equivalent Ge(2), and two equivalent Ge(5) atoms. In the second Ge site, Ge(2) is bonded in a 7-coordinate geometry to one Nd(1), two equivalent Nd(2), one Ge(2), one Ge(4), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to three equivalent Nd(2), one Ge(1), two equivalent Ge(3), and two equivalent Ge(5) atoms. In the fourth Ge site, Ge(4) is bonded in a 6-coordinate geometry to three equivalent Nd(1), one Ge(2), and two equivalent Ge(4) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to one Nd(1), one Nd(2), four equivalent Ge(1), and four equivalent Ge(3) atoms. is represented by the CIF card [CIF]
data_Nd2Ge9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.043
_cell_length_b   9.610
_cell_length_c   12.487
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   485.115
_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
  Nd  Nd0  1  0.500  0.500  0.871  1.0
  Nd  Nd1  1  0.000  0.000  0.129  1.0
  Nd  Nd2  1  0.500  0.500  0.382  1.0
  Nd  Nd3  1  0.000  0.000  0.618  1.0
  Ge  Ge4  1  0.500  0.811  0.267  1.0
  Ge  Ge5  1  0.500  0.189  0.267  1.0
  Ge  Ge6  1  0.000  0.689  0.733  1.0
  Ge  Ge7  1  0.000  0.311  0.733  1.0
  Ge  Ge8  1  0.500  0.846  0.782  1.0
  Ge  Ge9  1  0.500  0.154  0.782  1.0
  Ge  Ge10  1  0.000  0.654  0.218  1.0
  Ge  Ge11  1  0.000  0.346  0.218  1.0
  Ge  Ge12  1  0.500  0.832  0.472  1.0
  Ge  Ge13  1  0.500  0.168  0.472  1.0
  Ge  Ge14  1  0.000  0.668  0.528  1.0
  Ge  Ge15  1  0.000  0.332  0.528  1.0
  Ge  Ge16  1  0.500  0.828  0.981  1.0
  Ge  Ge17  1  0.500  0.172  0.981  1.0
  Ge  Ge18  1  0.000  0.672  0.019  1.0
  Ge  Ge19  1  0.000  0.328  0.019  1.0
  Ge  Ge20  1  0.500  0.500  0.627  1.0
  Ge  Ge21  1  0.000  0.000  0.373  1.0
[/CIF]
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