The material structure described by Ho2Cu(GeO3)4 crystallizes in the triclinic P-1 space group. Ho(1) is bonded to one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted HoO7 pentagonal bipyramids that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Ho(1)O7 pentagonal bipyramids, and  an edgeedge with one Ge(2)O4 tetrahedra. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form GeO4 tetrahedra that share corners with four equivalent Ho(1)O7 pentagonal bipyramids and corners with two equivalent Ge(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ho(1)O7 pentagonal bipyramids, corners with two equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Ho(1)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ho(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ho(1), one Cu(1), and one Ge(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ho(1), one Cu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Ho2Cu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.993
_cell_length_b   7.260
_cell_length_c   7.985
_cell_angle_alpha   113.604
_cell_angle_beta   86.943
_cell_angle_gamma   103.146
_symmetry_Int_Tables_number   1
_cell_volume   258.005
_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
  Ho  Ho0  1  0.954  0.770  0.549  1.0
  Ho  Ho1  1  0.046  0.230  0.451  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.460  0.832  0.225  1.0
  Ge  Ge4  1  0.540  0.168  0.775  1.0
  Ge  Ge5  1  0.418  0.616  0.795  1.0
  Ge  Ge6  1  0.582  0.384  0.205  1.0
  O  O7  1  0.225  0.933  0.389  1.0
  O  O8  1  0.775  0.067  0.611  1.0
  O  O9  1  0.206  0.575  0.611  1.0
  O  O10  1  0.794  0.425  0.389  1.0
  O  O11  1  0.584  0.658  0.295  1.0
  O  O12  1  0.416  0.342  0.705  1.0
  O  O13  1  0.268  0.688  0.012  1.0
  O  O14  1  0.257  0.223  0.194  1.0
  O  O15  1  0.743  0.777  0.806  1.0
  O  O16  1  0.248  0.992  0.796  1.0
  O  O17  1  0.752  0.008  0.204  1.0
  O  O18  1  0.732  0.312  0.988  1.0
[/CIF]
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The material structure described by Ho2Cu(GeO3)4 crystallizes in the triclinic P-1 space group. Ho(1) is bonded to one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form distorted HoO7 pentagonal bipyramids that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Ho(1)O7 pentagonal bipyramids, and  an edgeedge with one Ge(2)O4 tetrahedra. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form GeO4 tetrahedra that share corners with four equivalent Ho(1)O7 pentagonal bipyramids and corners with two equivalent Ge(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ho(1)O7 pentagonal bipyramids, corners with two equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Ho(1)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ho(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ho(1), one Cu(1), and one Ge(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ho(1), one Cu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Ho2Cu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.993
_cell_length_b   7.260
_cell_length_c   7.985
_cell_angle_alpha   113.604
_cell_angle_beta   86.943
_cell_angle_gamma   103.146
_symmetry_Int_Tables_number   1
_cell_volume   258.005
_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
  Ho  Ho0  1  0.954  0.770  0.549  1.0
  Ho  Ho1  1  0.046  0.230  0.451  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.460  0.832  0.225  1.0
  Ge  Ge4  1  0.540  0.168  0.775  1.0
  Ge  Ge5  1  0.418  0.616  0.795  1.0
  Ge  Ge6  1  0.582  0.384  0.205  1.0
  O  O7  1  0.225  0.933  0.389  1.0
  O  O8  1  0.775  0.067  0.611  1.0
  O  O9  1  0.206  0.575  0.611  1.0
  O  O10  1  0.794  0.425  0.389  1.0
  O  O11  1  0.584  0.658  0.295  1.0
  O  O12  1  0.416  0.342  0.705  1.0
  O  O13  1  0.268  0.688  0.012  1.0
  O  O14  1  0.257  0.223  0.194  1.0
  O  O15  1  0.743  0.777  0.806  1.0
  O  O16  1  0.248  0.992  0.796  1.0
  O  O17  1  0.752  0.008  0.204  1.0
  O  O18  1  0.732  0.312  0.988  1.0
[/CIF]
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