The structure described by Y4AlGe8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(3) atoms. In the second Y site, Y(2) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(4) atoms. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to four equivalent Al(1), two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(1) atoms. In the fourth Y site, Y(4) is bonded in a 10-coordinate geometry to two equivalent Ge(3), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(2) atoms. Al(1) is bonded in a 9-coordinate geometry to four equivalent Y(3), one Ge(1), two equivalent Ge(5), and two equivalent Ge(7) atoms. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Y(2), four equivalent Y(3), one Al(1), and two equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Y(1), four equivalent Y(4), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Y(4), four equivalent Y(1), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Y(3), four equivalent Y(2), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to two equivalent Y(1), two equivalent Y(3), two equivalent Al(1), and four equivalent Ge(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 8-coordinate geometry to two equivalent Y(2), two equivalent Y(4), and four equivalent Ge(8) atoms. In the seventh Ge site, Ge(7) is bonded in a 4-coordinate geometry to two equivalent Y(1), two equivalent Y(3), two equivalent Al(1), and four equivalent Ge(5) atoms. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Y(2), two equivalent Y(4), and four equivalent Ge(6) atoms. is represented by the CIF file [CIF]
data_Y4AlGe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.047
_cell_length_b   4.171
_cell_length_c   16.374
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   276.379
_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
  Y  Y0  1  0.250  0.000  0.092  1.0
  Y  Y1  1  0.250  0.500  0.609  1.0
  Y  Y2  1  0.750  0.500  0.397  1.0
  Y  Y3  1  0.750  0.000  0.892  1.0
  Al  Al4  1  0.250  0.000  0.322  1.0
  Ge  Ge5  1  0.250  0.000  0.469  1.0
  Ge  Ge6  1  0.250  0.500  0.942  1.0
  Ge  Ge7  1  0.750  0.500  0.043  1.0
  Ge  Ge8  1  0.750  0.000  0.570  1.0
  Ge  Ge9  1  0.250  0.500  0.232  1.0
  Ge  Ge10  1  0.250  0.000  0.747  1.0
  Ge  Ge11  1  0.750  0.000  0.230  1.0
  Ge  Ge12  1  0.750  0.500  0.753  1.0
[/CIF]
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The structure described by Y4AlGe8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 10-coordinate geometry to two equivalent Ge(2), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(3) atoms. In the second Y site, Y(2) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(4) atoms. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to four equivalent Al(1), two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(1) atoms. In the fourth Y site, Y(4) is bonded in a 10-coordinate geometry to two equivalent Ge(3), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(2) atoms. Al(1) is bonded in a 9-coordinate geometry to four equivalent Y(3), one Ge(1), two equivalent Ge(5), and two equivalent Ge(7) atoms. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Y(2), four equivalent Y(3), one Al(1), and two equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Y(1), four equivalent Y(4), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Y(4), four equivalent Y(1), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 8-coordinate geometry to two equivalent Y(3), four equivalent Y(2), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to two equivalent Y(1), two equivalent Y(3), two equivalent Al(1), and four equivalent Ge(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 8-coordinate geometry to two equivalent Y(2), two equivalent Y(4), and four equivalent Ge(8) atoms. In the seventh Ge site, Ge(7) is bonded in a 4-coordinate geometry to two equivalent Y(1), two equivalent Y(3), two equivalent Al(1), and four equivalent Ge(5) atoms. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Y(2), two equivalent Y(4), and four equivalent Ge(6) atoms. is represented by the CIF file [CIF]
data_Y4AlGe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.047
_cell_length_b   4.171
_cell_length_c   16.374
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   276.379
_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
  Y  Y0  1  0.250  0.000  0.092  1.0
  Y  Y1  1  0.250  0.500  0.609  1.0
  Y  Y2  1  0.750  0.500  0.397  1.0
  Y  Y3  1  0.750  0.000  0.892  1.0
  Al  Al4  1  0.250  0.000  0.322  1.0
  Ge  Ge5  1  0.250  0.000  0.469  1.0
  Ge  Ge6  1  0.250  0.500  0.942  1.0
  Ge  Ge7  1  0.750  0.500  0.043  1.0
  Ge  Ge8  1  0.750  0.000  0.570  1.0
  Ge  Ge9  1  0.250  0.500  0.232  1.0
  Ge  Ge10  1  0.250  0.000  0.747  1.0
  Ge  Ge11  1  0.750  0.000  0.230  1.0
  Ge  Ge12  1  0.750  0.500  0.753  1.0
[/CIF]
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