The structure described by Rb2AlTb3F16 crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded in a 9-coordinate geometry to three equivalent F(1) and six equivalent F(2) atoms. Tb(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(1), two equivalent F(3), and four equivalent F(2) atoms. Al(1) is bonded in an octahedral geometry to six equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(4) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second F site, F(1) is bonded to two equivalent Rb(1) and two equivalent Tb(1) atoms to form a mixture of edge and corner-sharing FRb2Tb2 tetrahedra. In the third F site, F(2) is bonded to two equivalent Rb(1) and two equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing FRb2Tb2 tetrahedra. In the fourth F site, F(3) is bonded in a distorted bent 150 degrees geometry to one Tb(1) and one Al(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Tb3AlF16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.811
_cell_length_b   7.811
_cell_length_c   12.766
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   674.481
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.333  0.667  0.436  1.0
  Rb  Rb1  1  0.667  0.333  0.564  1.0
  Rb  Rb2  1  0.667  0.333  0.936  1.0
  Rb  Rb3  1  0.333  0.667  0.064  1.0
  Tb  Tb4  1  0.167  0.833  0.750  1.0
  Tb  Tb5  1  0.833  0.167  0.250  1.0
  Tb  Tb6  1  0.167  0.334  0.750  1.0
  Tb  Tb7  1  0.334  0.167  0.250  1.0
  Tb  Tb8  1  0.666  0.833  0.750  1.0
  Tb  Tb9  1  0.833  0.666  0.250  1.0
  Al  Al10  1  0.000  0.000  0.000  1.0
  Al  Al11  1  0.000  0.000  0.500  1.0
  F  F12  1  0.183  0.817  0.250  1.0
  F  F13  1  0.550  0.100  0.154  1.0
  F  F14  1  0.100  0.550  0.654  1.0
  F  F15  1  0.224  0.112  0.080  1.0
  F  F16  1  0.224  0.112  0.420  1.0
  F  F17  1  0.183  0.365  0.250  1.0
  F  F18  1  0.450  0.900  0.654  1.0
  F  F19  1  0.550  0.450  0.346  1.0
  F  F20  1  0.112  0.224  0.580  1.0
  F  F21  1  0.776  0.888  0.580  1.0
  F  F22  1  0.817  0.183  0.750  1.0
  F  F23  1  0.888  0.112  0.420  1.0
  F  F24  1  0.550  0.100  0.346  1.0
  F  F25  1  0.900  0.450  0.346  1.0
  F  F26  1  0.112  0.888  0.580  1.0
  F  F27  1  0.112  0.888  0.920  1.0
  F  F28  1  0.635  0.817  0.250  1.0
  F  F29  1  0.900  0.450  0.154  1.0
  F  F30  1  0.776  0.888  0.920  1.0
  F  F31  1  0.112  0.224  0.920  1.0
  F  F32  1  0.450  0.550  0.846  1.0
  F  F33  1  0.888  0.776  0.080  1.0
  F  F34  1  0.100  0.550  0.846  1.0
  F  F35  1  0.450  0.900  0.846  1.0
  F  F36  1  0.450  0.550  0.654  1.0
  F  F37  1  0.365  0.183  0.750  1.0
  F  F38  1  0.888  0.112  0.080  1.0
  F  F39  1  0.550  0.450  0.154  1.0
  F  F40  1  0.817  0.635  0.750  1.0
  F  F41  1  0.000  0.000  0.750  1.0
  F  F42  1  0.888  0.776  0.420  1.0
  F  F43  1  0.000  0.000  0.250  1.0
[/CIF]
.
The structure described by Rb2AlTb3F16 crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded in a 9-coordinate geometry to three equivalent F(1) and six equivalent F(2) atoms. Tb(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(1), two equivalent F(3), and four equivalent F(2) atoms. Al(1) is bonded in an octahedral geometry to six equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(4) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second F site, F(1) is bonded to two equivalent Rb(1) and two equivalent Tb(1) atoms to form a mixture of edge and corner-sharing FRb2Tb2 tetrahedra. In the third F site, F(2) is bonded to two equivalent Rb(1) and two equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing FRb2Tb2 tetrahedra. In the fourth F site, F(3) is bonded in a distorted bent 150 degrees geometry to one Tb(1) and one Al(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Tb3AlF16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.811
_cell_length_b   7.811
_cell_length_c   12.766
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   674.481
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.333  0.667  0.436  1.0
  Rb  Rb1  1  0.667  0.333  0.564  1.0
  Rb  Rb2  1  0.667  0.333  0.936  1.0
  Rb  Rb3  1  0.333  0.667  0.064  1.0
  Tb  Tb4  1  0.167  0.833  0.750  1.0
  Tb  Tb5  1  0.833  0.167  0.250  1.0
  Tb  Tb6  1  0.167  0.334  0.750  1.0
  Tb  Tb7  1  0.334  0.167  0.250  1.0
  Tb  Tb8  1  0.666  0.833  0.750  1.0
  Tb  Tb9  1  0.833  0.666  0.250  1.0
  Al  Al10  1  0.000  0.000  0.000  1.0
  Al  Al11  1  0.000  0.000  0.500  1.0
  F  F12  1  0.183  0.817  0.250  1.0
  F  F13  1  0.550  0.100  0.154  1.0
  F  F14  1  0.100  0.550  0.654  1.0
  F  F15  1  0.224  0.112  0.080  1.0
  F  F16  1  0.224  0.112  0.420  1.0
  F  F17  1  0.183  0.365  0.250  1.0
  F  F18  1  0.450  0.900  0.654  1.0
  F  F19  1  0.550  0.450  0.346  1.0
  F  F20  1  0.112  0.224  0.580  1.0
  F  F21  1  0.776  0.888  0.580  1.0
  F  F22  1  0.817  0.183  0.750  1.0
  F  F23  1  0.888  0.112  0.420  1.0
  F  F24  1  0.550  0.100  0.346  1.0
  F  F25  1  0.900  0.450  0.346  1.0
  F  F26  1  0.112  0.888  0.580  1.0
  F  F27  1  0.112  0.888  0.920  1.0
  F  F28  1  0.635  0.817  0.250  1.0
  F  F29  1  0.900  0.450  0.154  1.0
  F  F30  1  0.776  0.888  0.920  1.0
  F  F31  1  0.112  0.224  0.920  1.0
  F  F32  1  0.450  0.550  0.846  1.0
  F  F33  1  0.888  0.776  0.080  1.0
  F  F34  1  0.100  0.550  0.846  1.0
  F  F35  1  0.450  0.900  0.846  1.0
  F  F36  1  0.450  0.550  0.654  1.0
  F  F37  1  0.365  0.183  0.750  1.0
  F  F38  1  0.888  0.112  0.080  1.0
  F  F39  1  0.550  0.450  0.154  1.0
  F  F40  1  0.817  0.635  0.750  1.0
  F  F41  1  0.000  0.000  0.750  1.0
  F  F42  1  0.888  0.776  0.420  1.0
  F  F43  1  0.000  0.000  0.250  1.0
[/CIF]
.