The compound described by NaHo9(SiO4)6O2 crystallizes in the trigonal P3 space group. Na(1) is bonded in a 9-coordinate geometry to three equivalent O(10), three equivalent O(4), and three equivalent O(6) atoms. There are five inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(3), one O(6), one O(7), one O(8), and one O(9) atom. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the third Ho site, Ho(3) is bonded in a 9-coordinate geometry to three equivalent O(3), three equivalent O(5), and three equivalent O(9) atoms. In the fourth Ho site, Ho(4) is bonded in a 9-coordinate geometry to three equivalent O(3), three equivalent O(5), and three equivalent O(8) atoms. In the fifth Ho site, Ho(5) is bonded in a 6-coordinate geometry to three equivalent O(4) and three equivalent O(6) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(10), one O(3), one O(6), and one O(7) atom. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(8), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to one Ho(1), one Ho(2), one Ho(4), and one Si(2) atom. In the second O site, O(9) is bonded in a 4-coordinate geometry to one Ho(1), one Ho(2), one Ho(3), and one Si(2) atom. In the third O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one Ho(1), one Ho(2), and one Si(1) atom. In the fourth O site, O(1) is bonded in a trigonal planar geometry to three equivalent Ho(1) atoms. In the fifth O site, O(2) is bonded in a trigonal planar geometry to three equivalent Ho(2) atoms. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(3), one Ho(4), and one Si(1) atom. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Ho(2), one Ho(5), and one Si(2) atom. In the eighth O site, O(5) is bonded to one Ho(2), one Ho(3), one Ho(4), and one Si(2) atom to form distorted edge-sharing OHo3Si tetrahedra. In the ninth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Ho(1), one Ho(5), and one Si(1) atom. In the tenth O site, O(7) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_NaHo9(Si3O13)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.418
_cell_length_b   9.418
_cell_length_c   6.772
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   520.127
_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
  Na  Na0  1  0.000  0.000  0.504  1.0
  Ho  Ho1  1  0.101  0.669  0.251  1.0
  Ho  Ho2  1  0.568  0.899  0.251  1.0
  Ho  Ho3  1  0.331  0.432  0.251  1.0
  Ho  Ho4  1  0.570  0.669  0.749  1.0
  Ho  Ho5  1  0.099  0.430  0.749  1.0
  Ho  Ho6  1  0.331  0.901  0.749  1.0
  Ho  Ho7  1  0.667  0.333  0.002  1.0
  Ho  Ho8  1  0.667  0.333  0.499  1.0
  Ho  Ho9  1  0.000  0.000  0.997  1.0
  Si  Si10  1  0.960  0.265  0.251  1.0
  Si  Si11  1  0.305  0.040  0.251  1.0
  Si  Si12  1  0.735  0.695  0.251  1.0
  Si  Si13  1  0.705  0.064  0.753  1.0
  Si  Si14  1  0.359  0.295  0.753  1.0
  Si  Si15  1  0.936  0.641  0.753  1.0
  O  O16  1  0.333  0.667  0.247  1.0
  O  O17  1  0.333  0.667  0.749  1.0
  O  O18  1  0.839  0.344  0.251  1.0
  O  O19  1  0.505  0.161  0.251  1.0
  O  O20  1  0.656  0.495  0.251  1.0
  O  O21  1  0.818  0.981  0.762  1.0
  O  O22  1  0.164  0.182  0.762  1.0
  O  O23  1  0.019  0.836  0.762  1.0
  O  O24  1  0.803  0.268  0.750  1.0
  O  O25  1  0.465  0.197  0.750  1.0
  O  O26  1  0.732  0.535  0.750  1.0
  O  O27  1  0.855  0.066  0.237  1.0
  O  O28  1  0.210  0.145  0.237  1.0
  O  O29  1  0.934  0.790  0.237  1.0
  O  O30  1  0.085  0.331  0.059  1.0
  O  O31  1  0.246  0.915  0.059  1.0
  O  O32  1  0.669  0.754  0.059  1.0
  O  O33  1  0.583  0.008  0.558  1.0
  O  O34  1  0.426  0.417  0.558  1.0
  O  O35  1  0.992  0.574  0.558  1.0
  O  O36  1  0.578  0.009  0.943  1.0
  O  O37  1  0.431  0.422  0.943  1.0
  O  O38  1  0.991  0.569  0.943  1.0
  O  O39  1  0.088  0.340  0.438  1.0
  O  O40  1  0.252  0.912  0.438  1.0
  O  O41  1  0.660  0.748  0.438  1.0
[/CIF]
.
The compound described by NaHo9(SiO4)6O2 crystallizes in the trigonal P3 space group. Na(1) is bonded in a 9-coordinate geometry to three equivalent O(10), three equivalent O(4), and three equivalent O(6) atoms. There are five inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(3), one O(6), one O(7), one O(8), and one O(9) atom. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the third Ho site, Ho(3) is bonded in a 9-coordinate geometry to three equivalent O(3), three equivalent O(5), and three equivalent O(9) atoms. In the fourth Ho site, Ho(4) is bonded in a 9-coordinate geometry to three equivalent O(3), three equivalent O(5), and three equivalent O(8) atoms. In the fifth Ho site, Ho(5) is bonded in a 6-coordinate geometry to three equivalent O(4) and three equivalent O(6) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(10), one O(3), one O(6), and one O(7) atom. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(8), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to one Ho(1), one Ho(2), one Ho(4), and one Si(2) atom. In the second O site, O(9) is bonded in a 4-coordinate geometry to one Ho(1), one Ho(2), one Ho(3), and one Si(2) atom. In the third O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one Ho(1), one Ho(2), and one Si(1) atom. In the fourth O site, O(1) is bonded in a trigonal planar geometry to three equivalent Ho(1) atoms. In the fifth O site, O(2) is bonded in a trigonal planar geometry to three equivalent Ho(2) atoms. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(3), one Ho(4), and one Si(1) atom. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Ho(2), one Ho(5), and one Si(2) atom. In the eighth O site, O(5) is bonded to one Ho(2), one Ho(3), one Ho(4), and one Si(2) atom to form distorted edge-sharing OHo3Si tetrahedra. In the ninth O site, O(6) is bonded in a 4-coordinate geometry to one Na(1), one Ho(1), one Ho(5), and one Si(1) atom. In the tenth O site, O(7) is bonded in a 3-coordinate geometry to one Ho(1), one Ho(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_NaHo9(Si3O13)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.418
_cell_length_b   9.418
_cell_length_c   6.772
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   520.127
_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
  Na  Na0  1  0.000  0.000  0.504  1.0
  Ho  Ho1  1  0.101  0.669  0.251  1.0
  Ho  Ho2  1  0.568  0.899  0.251  1.0
  Ho  Ho3  1  0.331  0.432  0.251  1.0
  Ho  Ho4  1  0.570  0.669  0.749  1.0
  Ho  Ho5  1  0.099  0.430  0.749  1.0
  Ho  Ho6  1  0.331  0.901  0.749  1.0
  Ho  Ho7  1  0.667  0.333  0.002  1.0
  Ho  Ho8  1  0.667  0.333  0.499  1.0
  Ho  Ho9  1  0.000  0.000  0.997  1.0
  Si  Si10  1  0.960  0.265  0.251  1.0
  Si  Si11  1  0.305  0.040  0.251  1.0
  Si  Si12  1  0.735  0.695  0.251  1.0
  Si  Si13  1  0.705  0.064  0.753  1.0
  Si  Si14  1  0.359  0.295  0.753  1.0
  Si  Si15  1  0.936  0.641  0.753  1.0
  O  O16  1  0.333  0.667  0.247  1.0
  O  O17  1  0.333  0.667  0.749  1.0
  O  O18  1  0.839  0.344  0.251  1.0
  O  O19  1  0.505  0.161  0.251  1.0
  O  O20  1  0.656  0.495  0.251  1.0
  O  O21  1  0.818  0.981  0.762  1.0
  O  O22  1  0.164  0.182  0.762  1.0
  O  O23  1  0.019  0.836  0.762  1.0
  O  O24  1  0.803  0.268  0.750  1.0
  O  O25  1  0.465  0.197  0.750  1.0
  O  O26  1  0.732  0.535  0.750  1.0
  O  O27  1  0.855  0.066  0.237  1.0
  O  O28  1  0.210  0.145  0.237  1.0
  O  O29  1  0.934  0.790  0.237  1.0
  O  O30  1  0.085  0.331  0.059  1.0
  O  O31  1  0.246  0.915  0.059  1.0
  O  O32  1  0.669  0.754  0.059  1.0
  O  O33  1  0.583  0.008  0.558  1.0
  O  O34  1  0.426  0.417  0.558  1.0
  O  O35  1  0.992  0.574  0.558  1.0
  O  O36  1  0.578  0.009  0.943  1.0
  O  O37  1  0.431  0.422  0.943  1.0
  O  O38  1  0.991  0.569  0.943  1.0
  O  O39  1  0.088  0.340  0.438  1.0
  O  O40  1  0.252  0.912  0.438  1.0
  O  O41  1  0.660  0.748  0.438  1.0
[/CIF]
.