The structure described by LiTb4Al2(FeO6)2 crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(12), one O(2), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-73°. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(5), one O(6), and one O(8) atom. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), one O(5), one O(6), and one O(9) atom. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(3), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the fourth Tb site, Tb(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(12), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent Al(1)O6 octahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 38-40°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(3), one O(6), and one O(7) atom to form FeO6 octahedra that share corners with four equivalent Al(1)O6 octahedra and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 32-37°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(11), one O(2), one O(4), one O(6), and one O(7) atom to form AlO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 32-40°. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(3), one O(5), one O(8), and one O(9) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Fe(2), and one Al(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Fe(1), and one Al(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to one Tb(3), one Tb(4), one Fe(2), and one Al(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Tb(3), one Tb(4), one Fe(1), and one Al(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(4), one Fe(1), and one Al(2) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(3), one Fe(2), and one Al(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Tb(3), one Tb(4), one Fe(2), and one Al(1) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(3), one Tb(4), one Fe(1), and one Al(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(1), one Tb(2), one Tb(3), one Tb(4), one Fe(1), and one Al(2) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(3), one Tb(4), one Fe(2), and one Al(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(4), one Fe(2), and one Al(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Tb(3), one Fe(1), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiTb4Al2(FeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.314
_cell_length_b   5.799
_cell_length_c   7.587
_cell_angle_alpha   89.052
_cell_angle_beta   88.930
_cell_angle_gamma   88.376
_symmetry_Int_Tables_number   1
_cell_volume   233.651
_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
  Li  Li0  1  0.359  0.263  0.151  1.0
  Tb  Tb1  1  0.543  0.607  0.266  1.0
  Tb  Tb2  1  0.945  0.078  0.242  1.0
  Tb  Tb3  1  0.488  0.426  0.755  1.0
  Tb  Tb4  1  0.019  0.920  0.752  1.0
  Al  Al5  1  0.015  0.493  0.503  1.0
  Al  Al6  1  0.492  0.963  0.977  1.0
  Fe  Fe7  1  0.995  0.504  0.999  1.0
  Fe  Fe8  1  0.491  0.010  0.504  1.0
  O  O9  1  0.384  0.975  0.248  1.0
  O  O10  1  0.128  0.457  0.265  1.0
  O  O11  1  0.610  0.034  0.752  1.0
  O  O12  1  0.892  0.539  0.734  1.0
  O  O13  1  0.788  0.825  0.051  1.0
  O  O14  1  0.707  0.313  0.447  1.0
  O  O15  1  0.194  0.207  0.568  1.0
  O  O16  1  0.321  0.700  0.941  1.0
  O  O17  1  0.208  0.165  0.951  1.0
  O  O18  1  0.302  0.692  0.553  1.0
  O  O19  1  0.812  0.804  0.441  1.0
  O  O20  1  0.672  0.310  0.061  1.0
[/CIF]
.
The structure described by LiTb4Al2(FeO6)2 crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(12), one O(2), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-73°. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(5), one O(6), and one O(8) atom. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), one O(5), one O(6), and one O(9) atom. In the third Tb site, Tb(3) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(3), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the fourth Tb site, Tb(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(12), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent Al(1)O6 octahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 38-40°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(11), one O(3), one O(6), and one O(7) atom to form FeO6 octahedra that share corners with four equivalent Al(1)O6 octahedra and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 32-37°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(10), one O(11), one O(2), one O(4), one O(6), and one O(7) atom to form AlO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 32-40°. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(3), one O(5), one O(8), and one O(9) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Fe(2), and one Al(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Fe(1), and one Al(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to one Tb(3), one Tb(4), one Fe(2), and one Al(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Tb(3), one Tb(4), one Fe(1), and one Al(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(4), one Fe(1), and one Al(2) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(3), one Fe(2), and one Al(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Tb(3), one Tb(4), one Fe(2), and one Al(1) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(3), one Tb(4), one Fe(1), and one Al(2) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(1), one Tb(2), one Tb(3), one Tb(4), one Fe(1), and one Al(2) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(3), one Tb(4), one Fe(2), and one Al(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Tb(1), one Tb(2), one Tb(4), one Fe(2), and one Al(1) atom. In the twelfth O site, O(12) is bonded in a 6-coordinate geometry to one Li(1), one Tb(1), one Tb(2), one Tb(3), one Fe(1), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LiTb4Al2(FeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.314
_cell_length_b   5.799
_cell_length_c   7.587
_cell_angle_alpha   89.052
_cell_angle_beta   88.930
_cell_angle_gamma   88.376
_symmetry_Int_Tables_number   1
_cell_volume   233.651
_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
  Li  Li0  1  0.359  0.263  0.151  1.0
  Tb  Tb1  1  0.543  0.607  0.266  1.0
  Tb  Tb2  1  0.945  0.078  0.242  1.0
  Tb  Tb3  1  0.488  0.426  0.755  1.0
  Tb  Tb4  1  0.019  0.920  0.752  1.0
  Al  Al5  1  0.015  0.493  0.503  1.0
  Al  Al6  1  0.492  0.963  0.977  1.0
  Fe  Fe7  1  0.995  0.504  0.999  1.0
  Fe  Fe8  1  0.491  0.010  0.504  1.0
  O  O9  1  0.384  0.975  0.248  1.0
  O  O10  1  0.128  0.457  0.265  1.0
  O  O11  1  0.610  0.034  0.752  1.0
  O  O12  1  0.892  0.539  0.734  1.0
  O  O13  1  0.788  0.825  0.051  1.0
  O  O14  1  0.707  0.313  0.447  1.0
  O  O15  1  0.194  0.207  0.568  1.0
  O  O16  1  0.321  0.700  0.941  1.0
  O  O17  1  0.208  0.165  0.951  1.0
  O  O18  1  0.302  0.692  0.553  1.0
  O  O19  1  0.812  0.804  0.441  1.0
  O  O20  1  0.672  0.310  0.061  1.0
[/CIF]
.