The material structure described by Ho2AlGe3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 11-coordinate geometry to two equivalent Al(1), one Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms. Al(1) is bonded to two equivalent Ho(1), one Ge(3), and three equivalent Ge(1) atoms to form distorted AlHo2Ge4 tetrahedra that share corners with two equivalent Ge(1)Ho4Al3 pentagonal bipyramids and edges with four equivalent Al(1)Ho2Ge4 tetrahedra. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Ho(1), three equivalent Ho(2), and three equivalent Al(1) atoms to form distorted GeHo4Al3 pentagonal bipyramids that share corners with two equivalent Al(1)Ho2Ge4 tetrahedra and edges with six equivalent Ge(1)Ho4Al3 pentagonal bipyramids. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Ho(2), four equivalent Ho(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ho(2), four equivalent Ho(1), one Al(1), and two equivalent Ge(2) atoms. is represented by the CIF card [CIF]
data_Ho2AlGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.178
_cell_length_b   6.829
_cell_length_c   17.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.298
_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
  Ho  Ho0  1  0.250  0.666  0.703  1.0
  Ho  Ho1  1  0.750  0.334  0.297  1.0
  Ho  Ho2  1  0.750  0.834  0.203  1.0
  Ho  Ho3  1  0.250  0.166  0.797  1.0
  Ho  Ho4  1  0.250  0.668  0.915  1.0
  Ho  Ho5  1  0.750  0.332  0.085  1.0
  Ho  Ho6  1  0.750  0.832  0.415  1.0
  Ho  Ho7  1  0.250  0.168  0.585  1.0
  Al  Al8  1  0.250  0.951  0.064  1.0
  Al  Al9  1  0.750  0.049  0.936  1.0
  Al  Al10  1  0.750  0.549  0.564  1.0
  Al  Al11  1  0.250  0.451  0.436  1.0
  Ge  Ge12  1  0.250  0.751  0.535  1.0
  Ge  Ge13  1  0.750  0.249  0.465  1.0
  Ge  Ge14  1  0.750  0.749  0.035  1.0
  Ge  Ge15  1  0.250  0.251  0.965  1.0
  Ge  Ge16  1  0.250  0.535  0.172  1.0
  Ge  Ge17  1  0.750  0.465  0.828  1.0
  Ge  Ge18  1  0.750  0.965  0.672  1.0
  Ge  Ge19  1  0.250  0.035  0.328  1.0
  Ge  Ge20  1  0.250  0.646  0.312  1.0
  Ge  Ge21  1  0.750  0.354  0.688  1.0
  Ge  Ge22  1  0.750  0.854  0.812  1.0
  Ge  Ge23  1  0.250  0.146  0.188  1.0
[/CIF]
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The material structure described by Ho2AlGe3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 11-coordinate geometry to two equivalent Al(1), one Ge(1), four equivalent Ge(2), and four equivalent Ge(3) atoms. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), and three equivalent Ge(1) atoms. Al(1) is bonded to two equivalent Ho(1), one Ge(3), and three equivalent Ge(1) atoms to form distorted AlHo2Ge4 tetrahedra that share corners with two equivalent Ge(1)Ho4Al3 pentagonal bipyramids and edges with four equivalent Al(1)Ho2Ge4 tetrahedra. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Ho(1), three equivalent Ho(2), and three equivalent Al(1) atoms to form distorted GeHo4Al3 pentagonal bipyramids that share corners with two equivalent Al(1)Ho2Ge4 tetrahedra and edges with six equivalent Ge(1)Ho4Al3 pentagonal bipyramids. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Ho(2), four equivalent Ho(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Ho(2), four equivalent Ho(1), one Al(1), and two equivalent Ge(2) atoms. is represented by the CIF card [CIF]
data_Ho2AlGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.178
_cell_length_b   6.829
_cell_length_c   17.678
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.298
_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
  Ho  Ho0  1  0.250  0.666  0.703  1.0
  Ho  Ho1  1  0.750  0.334  0.297  1.0
  Ho  Ho2  1  0.750  0.834  0.203  1.0
  Ho  Ho3  1  0.250  0.166  0.797  1.0
  Ho  Ho4  1  0.250  0.668  0.915  1.0
  Ho  Ho5  1  0.750  0.332  0.085  1.0
  Ho  Ho6  1  0.750  0.832  0.415  1.0
  Ho  Ho7  1  0.250  0.168  0.585  1.0
  Al  Al8  1  0.250  0.951  0.064  1.0
  Al  Al9  1  0.750  0.049  0.936  1.0
  Al  Al10  1  0.750  0.549  0.564  1.0
  Al  Al11  1  0.250  0.451  0.436  1.0
  Ge  Ge12  1  0.250  0.751  0.535  1.0
  Ge  Ge13  1  0.750  0.249  0.465  1.0
  Ge  Ge14  1  0.750  0.749  0.035  1.0
  Ge  Ge15  1  0.250  0.251  0.965  1.0
  Ge  Ge16  1  0.250  0.535  0.172  1.0
  Ge  Ge17  1  0.750  0.465  0.828  1.0
  Ge  Ge18  1  0.750  0.965  0.672  1.0
  Ge  Ge19  1  0.250  0.035  0.328  1.0
  Ge  Ge20  1  0.250  0.646  0.312  1.0
  Ge  Ge21  1  0.750  0.354  0.688  1.0
  Ge  Ge22  1  0.750  0.854  0.812  1.0
  Ge  Ge23  1  0.250  0.146  0.188  1.0
[/CIF]
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