The crystal structure described by Li3CrAl2O6 is beta Polonium-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, edges with four equivalent Al(1)O6 octahedra, and edges with six equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. In the second Li site, Li(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with four equivalent Li(2)O6 octahedra, and edges with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 9°. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with three equivalent Cr(1)O6 octahedra, edges with three equivalent Al(1)O6 octahedra, and edges with four equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Li(2), one Cr(1), and two equivalent Al(1) atoms to form a mixture of corner and edge-sharing OLi3Al2Cr octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(2), one Cr(1), and two equivalent Al(1) atoms to form a mixture of corner and edge-sharing OLi3Al2Cr octahedra. The corner-sharing octahedral tilt angles range from 0-3°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3Al2CrO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.983
_cell_length_b   4.983
_cell_length_c   5.100
_cell_angle_alpha   99.458
_cell_angle_beta   99.458
_cell_angle_gamma   119.984
_symmetry_Int_Tables_number   1
_cell_volume   103.601
_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
  Al  Al0  1  0.667  0.333  0.000  1.0
  Al  Al1  1  0.333  0.667  0.000  1.0
  Cr  Cr2  1  0.000  1.000  1.000  1.0
  Li  Li3  1  0.500  0.500  0.500  1.0
  Li  Li4  1  0.832  0.168  0.500  1.0
  Li  Li5  1  0.168  0.832  0.500  1.0
  O  O6  1  0.273  0.273  0.782  1.0
  O  O7  1  0.727  0.727  0.218  1.0
  O  O8  1  0.073  0.419  0.217  1.0
  O  O9  1  0.419  0.073  0.217  1.0
  O  O10  1  0.581  0.927  0.783  1.0
  O  O11  1  0.927  0.581  0.783  1.0
[/CIF]
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The crystal structure described by Li3CrAl2O6 is beta Polonium-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, edges with four equivalent Al(1)O6 octahedra, and edges with six equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. In the second Li site, Li(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-9°. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with four equivalent Li(2)O6 octahedra, and edges with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 9°. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with four equivalent Li(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with three equivalent Cr(1)O6 octahedra, edges with three equivalent Al(1)O6 octahedra, and edges with four equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Li(2), one Cr(1), and two equivalent Al(1) atoms to form a mixture of corner and edge-sharing OLi3Al2Cr octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(2), one Cr(1), and two equivalent Al(1) atoms to form a mixture of corner and edge-sharing OLi3Al2Cr octahedra. The corner-sharing octahedral tilt angles range from 0-3°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3Al2CrO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.983
_cell_length_b   4.983
_cell_length_c   5.100
_cell_angle_alpha   99.458
_cell_angle_beta   99.458
_cell_angle_gamma   119.984
_symmetry_Int_Tables_number   1
_cell_volume   103.601
_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
  Al  Al0  1  0.667  0.333  0.000  1.0
  Al  Al1  1  0.333  0.667  0.000  1.0
  Cr  Cr2  1  0.000  1.000  1.000  1.0
  Li  Li3  1  0.500  0.500  0.500  1.0
  Li  Li4  1  0.832  0.168  0.500  1.0
  Li  Li5  1  0.168  0.832  0.500  1.0
  O  O6  1  0.273  0.273  0.782  1.0
  O  O7  1  0.727  0.727  0.218  1.0
  O  O8  1  0.073  0.419  0.217  1.0
  O  O9  1  0.419  0.073  0.217  1.0
  O  O10  1  0.581  0.927  0.783  1.0
  O  O11  1  0.927  0.581  0.783  1.0
[/CIF]
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