The structure described by LiSrAl2B2O7 crystallizes in the monoclinic C2 space group. Li(1) is bonded in a distorted T-shaped geometry to one O(4) and two equivalent O(3) atoms. Sr(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing AlO4 tetrahedra. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Al(1), and one B(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Al(1), and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Li(1) and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrLiAl2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.832
_cell_length_b   8.577
_cell_length_c   8.832
_cell_angle_alpha   32.887
_cell_angle_beta   32.720
_cell_angle_gamma   32.887
_symmetry_Int_Tables_number   1
_cell_volume   174.976
_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
  Sr  Sr0  1  1.000  0.000  0.000  1.0
  Li  Li1  1  0.920  0.500  0.080  1.0
  Al  Al2  1  0.418  0.441  0.433  1.0
  Al  Al3  1  0.567  0.559  0.582  1.0
  B  B4  1  0.273  0.259  0.259  1.0
  B  B5  1  0.741  0.741  0.727  1.0
  O  O6  1  0.039  0.670  0.479  1.0
  O  O7  1  0.490  0.035  0.665  1.0
  O  O8  1  0.698  0.495  0.032  1.0
  O  O9  1  0.530  0.500  0.470  1.0
  O  O10  1  0.335  0.965  0.510  1.0
  O  O11  1  0.521  0.330  0.961  1.0
  O  O12  1  0.968  0.505  0.302  1.0
[/CIF]
.
The structure described by LiSrAl2B2O7 crystallizes in the monoclinic C2 space group. Li(1) is bonded in a distorted T-shaped geometry to one O(4) and two equivalent O(3) atoms. Sr(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing AlO4 tetrahedra. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Al(1), and one B(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Al(1), and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Sr(1), one Al(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Li(1) and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrLiAl2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.832
_cell_length_b   8.577
_cell_length_c   8.832
_cell_angle_alpha   32.887
_cell_angle_beta   32.720
_cell_angle_gamma   32.887
_symmetry_Int_Tables_number   1
_cell_volume   174.976
_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
  Sr  Sr0  1  1.000  0.000  0.000  1.0
  Li  Li1  1  0.920  0.500  0.080  1.0
  Al  Al2  1  0.418  0.441  0.433  1.0
  Al  Al3  1  0.567  0.559  0.582  1.0
  B  B4  1  0.273  0.259  0.259  1.0
  B  B5  1  0.741  0.741  0.727  1.0
  O  O6  1  0.039  0.670  0.479  1.0
  O  O7  1  0.490  0.035  0.665  1.0
  O  O8  1  0.698  0.495  0.032  1.0
  O  O9  1  0.530  0.500  0.470  1.0
  O  O10  1  0.335  0.965  0.510  1.0
  O  O11  1  0.521  0.330  0.961  1.0
  O  O12  1  0.968  0.505  0.302  1.0
[/CIF]
.