The structure described by CaHo2Cu(SiO3)4 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent Cu(1), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Ho(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(3), and two equivalent O(6) atoms. Cu(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent O(1), and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ho(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ca(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ho(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ho(1), one Cu(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaHo2Cu(SiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.231
_cell_length_b   7.525
_cell_length_c   7.969
_cell_angle_alpha   62.356
_cell_angle_beta   85.145
_cell_angle_gamma   77.828
_symmetry_Int_Tables_number   1
_cell_volume   271.601
_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
  Ca  Ca0  1  0.500  0.000  0.000  1.0
  Ho  Ho1  1  0.008  0.784  0.427  1.0
  Ho  Ho2  1  0.992  0.216  0.573  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Si  Si4  1  0.589  0.571  0.230  1.0
  Si  Si5  1  0.411  0.429  0.770  1.0
  Si  Si6  1  0.425  0.196  0.236  1.0
  Si  Si7  1  0.575  0.804  0.764  1.0
  O  O8  1  0.339  0.733  0.247  1.0
  O  O9  1  0.661  0.267  0.753  1.0
  O  O10  1  0.348  0.330  0.003  1.0
  O  O11  1  0.652  0.670  0.997  1.0
  O  O12  1  0.158  0.452  0.651  1.0
  O  O13  1  0.842  0.548  0.349  1.0
  O  O14  1  0.333  0.988  0.749  1.0
  O  O15  1  0.667  0.012  0.251  1.0
  O  O16  1  0.523  0.341  0.311  1.0
  O  O17  1  0.477  0.659  0.689  1.0
  O  O18  1  0.171  0.109  0.354  1.0
  O  O19  1  0.829  0.891  0.646  1.0
[/CIF]
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The structure described by CaHo2Cu(SiO3)4 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent Cu(1), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Ho(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(3), and two equivalent O(6) atoms. Cu(1) is bonded in a 6-coordinate geometry to two equivalent Ca(1), two equivalent O(1), and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ho(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ca(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ho(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ca(1), one Ho(1), one Cu(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaHo2Cu(SiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.231
_cell_length_b   7.525
_cell_length_c   7.969
_cell_angle_alpha   62.356
_cell_angle_beta   85.145
_cell_angle_gamma   77.828
_symmetry_Int_Tables_number   1
_cell_volume   271.601
_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
  Ca  Ca0  1  0.500  0.000  0.000  1.0
  Ho  Ho1  1  0.008  0.784  0.427  1.0
  Ho  Ho2  1  0.992  0.216  0.573  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Si  Si4  1  0.589  0.571  0.230  1.0
  Si  Si5  1  0.411  0.429  0.770  1.0
  Si  Si6  1  0.425  0.196  0.236  1.0
  Si  Si7  1  0.575  0.804  0.764  1.0
  O  O8  1  0.339  0.733  0.247  1.0
  O  O9  1  0.661  0.267  0.753  1.0
  O  O10  1  0.348  0.330  0.003  1.0
  O  O11  1  0.652  0.670  0.997  1.0
  O  O12  1  0.158  0.452  0.651  1.0
  O  O13  1  0.842  0.548  0.349  1.0
  O  O14  1  0.333  0.988  0.749  1.0
  O  O15  1  0.667  0.012  0.251  1.0
  O  O16  1  0.523  0.341  0.311  1.0
  O  O17  1  0.477  0.659  0.689  1.0
  O  O18  1  0.171  0.109  0.354  1.0
  O  O19  1  0.829  0.891  0.646  1.0
[/CIF]
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