The crystal structure described by TlAlSiO4 crystallizes in the orthorhombic Pnma space group. Tl(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AlO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Al(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Tl(1), one Al(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_AlTlSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.464
_cell_length_b   8.352
_cell_length_c   9.603
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   438.258
_cell_formula_units_Z   4
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
  Al  Al0  1  0.750  0.693  0.584  1.0
  Al  Al1  1  0.250  0.307  0.416  1.0
  Al  Al2  1  0.250  0.807  0.084  1.0
  Al  Al3  1  0.750  0.193  0.916  1.0
  Tl  Tl4  1  0.750  0.498  0.183  1.0
  Tl  Tl5  1  0.250  0.502  0.817  1.0
  Tl  Tl6  1  0.250  0.002  0.683  1.0
  Tl  Tl7  1  0.750  0.998  0.317  1.0
  Si  Si8  1  0.750  0.796  0.923  1.0
  Si  Si9  1  0.250  0.204  0.077  1.0
  Si  Si10  1  0.250  0.704  0.423  1.0
  Si  Si11  1  0.750  0.296  0.577  1.0
  O  O12  1  0.750  0.487  0.563  1.0
  O  O13  1  0.250  0.513  0.437  1.0
  O  O14  1  0.250  0.013  0.063  1.0
  O  O15  1  0.750  0.987  0.937  1.0
  O  O16  1  0.750  0.741  0.760  1.0
  O  O17  1  0.250  0.259  0.240  1.0
  O  O18  1  0.250  0.759  0.260  1.0
  O  O19  1  0.750  0.241  0.740  1.0
  O  O20  1  0.009  0.783  0.503  1.0
  O  O21  1  0.509  0.217  0.497  1.0
  O  O22  1  0.509  0.717  0.003  1.0
  O  O23  1  0.009  0.283  0.997  1.0
  O  O24  1  0.491  0.783  0.503  1.0
  O  O25  1  0.991  0.217  0.497  1.0
  O  O26  1  0.991  0.717  0.003  1.0
  O  O27  1  0.491  0.283  0.997  1.0
[/CIF]
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The crystal structure described by TlAlSiO4 crystallizes in the orthorhombic Pnma space group. Tl(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form AlO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Al(1) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Tl(1), one Al(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_AlTlSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.464
_cell_length_b   8.352
_cell_length_c   9.603
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   438.258
_cell_formula_units_Z   4
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
  Al  Al0  1  0.750  0.693  0.584  1.0
  Al  Al1  1  0.250  0.307  0.416  1.0
  Al  Al2  1  0.250  0.807  0.084  1.0
  Al  Al3  1  0.750  0.193  0.916  1.0
  Tl  Tl4  1  0.750  0.498  0.183  1.0
  Tl  Tl5  1  0.250  0.502  0.817  1.0
  Tl  Tl6  1  0.250  0.002  0.683  1.0
  Tl  Tl7  1  0.750  0.998  0.317  1.0
  Si  Si8  1  0.750  0.796  0.923  1.0
  Si  Si9  1  0.250  0.204  0.077  1.0
  Si  Si10  1  0.250  0.704  0.423  1.0
  Si  Si11  1  0.750  0.296  0.577  1.0
  O  O12  1  0.750  0.487  0.563  1.0
  O  O13  1  0.250  0.513  0.437  1.0
  O  O14  1  0.250  0.013  0.063  1.0
  O  O15  1  0.750  0.987  0.937  1.0
  O  O16  1  0.750  0.741  0.760  1.0
  O  O17  1  0.250  0.259  0.240  1.0
  O  O18  1  0.250  0.759  0.260  1.0
  O  O19  1  0.750  0.241  0.740  1.0
  O  O20  1  0.009  0.783  0.503  1.0
  O  O21  1  0.509  0.217  0.497  1.0
  O  O22  1  0.509  0.717  0.003  1.0
  O  O23  1  0.009  0.283  0.997  1.0
  O  O24  1  0.491  0.783  0.503  1.0
  O  O25  1  0.991  0.217  0.497  1.0
  O  O26  1  0.991  0.717  0.003  1.0
  O  O27  1  0.491  0.283  0.997  1.0
[/CIF]
.