The crystal structure described by Y2AlGe3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 11-coordinate geometry to two equivalent Al(1), one Ge(3), four equivalent Ge(1), and four equivalent Ge(2) atoms. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. Al(1) is bonded to two equivalent Y(1), one Ge(2), and three equivalent Ge(3) atoms to form distorted edge-sharing AlY2Ge4 tetrahedra. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Y(2), four equivalent Y(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Y(2), four equivalent Y(1), one Al(1), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to one Y(1), three equivalent Y(2), and three equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2AlGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.216
_cell_length_b   6.840
_cell_length_c   17.755
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   511.995
_cell_formula_units_Z   4
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  0.667  0.796  1.0
  Y  Y1  1  0.750  0.333  0.204  1.0
  Y  Y2  1  0.250  0.167  0.704  1.0
  Y  Y3  1  0.750  0.833  0.296  1.0
  Y  Y4  1  0.250  0.169  0.915  1.0
  Y  Y5  1  0.750  0.831  0.085  1.0
  Y  Y6  1  0.250  0.669  0.585  1.0
  Y  Y7  1  0.750  0.331  0.415  1.0
  Al  Al8  1  0.250  0.450  0.064  1.0
  Al  Al9  1  0.750  0.550  0.936  1.0
  Al  Al10  1  0.250  0.950  0.436  1.0
  Al  Al11  1  0.750  0.050  0.564  1.0
  Ge  Ge12  1  0.250  0.037  0.173  1.0
  Ge  Ge13  1  0.750  0.963  0.827  1.0
  Ge  Ge14  1  0.250  0.537  0.327  1.0
  Ge  Ge15  1  0.750  0.463  0.673  1.0
  Ge  Ge16  1  0.750  0.855  0.688  1.0
  Ge  Ge17  1  0.250  0.145  0.312  1.0
  Ge  Ge18  1  0.750  0.355  0.812  1.0
  Ge  Ge19  1  0.250  0.645  0.188  1.0
  Ge  Ge20  1  0.750  0.750  0.466  1.0
  Ge  Ge21  1  0.250  0.250  0.534  1.0
  Ge  Ge22  1  0.750  0.250  0.034  1.0
  Ge  Ge23  1  0.250  0.750  0.966  1.0
[/CIF]
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The crystal structure described by Y2AlGe3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 11-coordinate geometry to two equivalent Al(1), one Ge(3), four equivalent Ge(1), and four equivalent Ge(2) atoms. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. Al(1) is bonded to two equivalent Y(1), one Ge(2), and three equivalent Ge(3) atoms to form distorted edge-sharing AlY2Ge4 tetrahedra. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Y(2), four equivalent Y(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Y(2), four equivalent Y(1), one Al(1), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to one Y(1), three equivalent Y(2), and three equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2AlGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.216
_cell_length_b   6.840
_cell_length_c   17.755
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   511.995
_cell_formula_units_Z   4
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  0.667  0.796  1.0
  Y  Y1  1  0.750  0.333  0.204  1.0
  Y  Y2  1  0.250  0.167  0.704  1.0
  Y  Y3  1  0.750  0.833  0.296  1.0
  Y  Y4  1  0.250  0.169  0.915  1.0
  Y  Y5  1  0.750  0.831  0.085  1.0
  Y  Y6  1  0.250  0.669  0.585  1.0
  Y  Y7  1  0.750  0.331  0.415  1.0
  Al  Al8  1  0.250  0.450  0.064  1.0
  Al  Al9  1  0.750  0.550  0.936  1.0
  Al  Al10  1  0.250  0.950  0.436  1.0
  Al  Al11  1  0.750  0.050  0.564  1.0
  Ge  Ge12  1  0.250  0.037  0.173  1.0
  Ge  Ge13  1  0.750  0.963  0.827  1.0
  Ge  Ge14  1  0.250  0.537  0.327  1.0
  Ge  Ge15  1  0.750  0.463  0.673  1.0
  Ge  Ge16  1  0.750  0.855  0.688  1.0
  Ge  Ge17  1  0.250  0.145  0.312  1.0
  Ge  Ge18  1  0.750  0.355  0.812  1.0
  Ge  Ge19  1  0.250  0.645  0.188  1.0
  Ge  Ge20  1  0.750  0.750  0.466  1.0
  Ge  Ge21  1  0.250  0.250  0.534  1.0
  Ge  Ge22  1  0.750  0.250  0.034  1.0
  Ge  Ge23  1  0.250  0.750  0.966  1.0
[/CIF]
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