The material structure described by Li2Al(NiO2)3 is Caswellsilverite-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with three equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-7°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, and edges with three equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(4)O6 octahedra, and edges with three equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(3)O6 octahedra, and edges with three equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the third Ni site, Ni(3) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(2)O6 octahedra, and edges with three equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-11°. In the fourth Ni site, Ni(4) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(1)O6 octahedra, and edges with three equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-10°. In the fifth Ni site, Ni(5) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, and edges with three equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(2)O6 octahedra, and edges with three equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. In the second Al site, Al(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(1)O6 octahedra, and edges with three equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. There are six inequivalent O sites. In the first O site, O(5) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(6) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the third O site, O(1) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 1-8°. In the fourth O site, O(2) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the fifth O site, O(3) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the sixth O site, O(4) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. is represented by the CIF card [CIF]
data_Li2Al(NiO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.013
_cell_length_b   5.013
_cell_length_c   9.697
_cell_angle_alpha   94.371
_cell_angle_beta   85.628
_cell_angle_gamma   61.350
_symmetry_Int_Tables_number   1
_cell_volume   211.455
_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
  Li  Li0  1  0.916  0.414  0.251  1.0
  Li  Li1  1  0.414  0.916  0.749  1.0
  Li  Li2  1  0.586  0.093  0.251  1.0
  Li  Li3  1  0.093  0.586  0.749  1.0
  Al  Al4  1  0.664  0.664  1.000  1.0
  Al  Al5  1  0.172  0.172  0.500  1.0
  Ni  Ni6  1  0.498  0.498  0.500  1.0
  Ni  Ni7  1  0.999  0.999  1.000  1.0
  Ni  Ni8  1  0.334  0.334  1.000  1.0
  Ni  Ni9  1  0.832  0.832  0.500  1.0
  Ni  Ni10  1  0.251  0.743  0.251  1.0
  Ni  Ni11  1  0.743  0.251  0.749  1.0
  O  O12  1  0.302  0.010  0.109  1.0
  O  O13  1  0.822  0.520  0.611  1.0
  O  O14  1  0.520  0.822  0.389  1.0
  O  O15  1  0.010  0.302  0.891  1.0
  O  O16  1  0.624  0.400  0.122  1.0
  O  O17  1  0.107  0.898  0.614  1.0
  O  O18  1  0.898  0.107  0.386  1.0
  O  O19  1  0.400  0.624  0.878  1.0
  O  O20  1  0.948  0.720  0.111  1.0
  O  O21  1  0.447  0.201  0.620  1.0
  O  O22  1  0.201  0.447  0.380  1.0
  O  O23  1  0.720  0.948  0.889  1.0
[/CIF]
.
The material structure described by Li2Al(NiO2)3 is Caswellsilverite-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with three equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-7°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form LiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, and edges with three equivalent Ni(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(4)O6 octahedra, and edges with three equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(3)O6 octahedra, and edges with three equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the third Ni site, Ni(3) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(2)O6 octahedra, and edges with three equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-11°. In the fourth Ni site, Ni(4) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(1)O6 octahedra, and edges with three equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-10°. In the fifth Ni site, Ni(5) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NiO6 octahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra,  a cornercorner with one Ni(3)O6 octahedra,  a cornercorner with one Ni(4)O6 octahedra,  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, edges with three equivalent Li(1)O6 octahedra, and edges with three equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-11°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(2)O6 octahedra, and edges with three equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. In the second Al site, Al(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Ni(5)O6 octahedra, edges with three equivalent Ni(1)O6 octahedra, and edges with three equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. There are six inequivalent O sites. In the first O site, O(5) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the second O site, O(6) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the third O site, O(1) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 1-8°. In the fourth O site, O(2) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the fifth O site, O(3) is bonded to one Li(1), one Li(2), one Ni(2), one Ni(3), one Ni(5), and one Al(1) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-6°. In the sixth O site, O(4) is bonded to one Li(1), one Li(2), one Ni(1), one Ni(4), one Ni(5), and one Al(2) atom to form a mixture of corner and edge-sharing OLi2AlNi3 octahedra. The corner-sharing octahedral tilt angles range from 2-8°. is represented by the CIF card [CIF]
data_Li2Al(NiO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.013
_cell_length_b   5.013
_cell_length_c   9.697
_cell_angle_alpha   94.371
_cell_angle_beta   85.628
_cell_angle_gamma   61.350
_symmetry_Int_Tables_number   1
_cell_volume   211.455
_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
  Li  Li0  1  0.916  0.414  0.251  1.0
  Li  Li1  1  0.414  0.916  0.749  1.0
  Li  Li2  1  0.586  0.093  0.251  1.0
  Li  Li3  1  0.093  0.586  0.749  1.0
  Al  Al4  1  0.664  0.664  1.000  1.0
  Al  Al5  1  0.172  0.172  0.500  1.0
  Ni  Ni6  1  0.498  0.498  0.500  1.0
  Ni  Ni7  1  0.999  0.999  1.000  1.0
  Ni  Ni8  1  0.334  0.334  1.000  1.0
  Ni  Ni9  1  0.832  0.832  0.500  1.0
  Ni  Ni10  1  0.251  0.743  0.251  1.0
  Ni  Ni11  1  0.743  0.251  0.749  1.0
  O  O12  1  0.302  0.010  0.109  1.0
  O  O13  1  0.822  0.520  0.611  1.0
  O  O14  1  0.520  0.822  0.389  1.0
  O  O15  1  0.010  0.302  0.891  1.0
  O  O16  1  0.624  0.400  0.122  1.0
  O  O17  1  0.107  0.898  0.614  1.0
  O  O18  1  0.898  0.107  0.386  1.0
  O  O19  1  0.400  0.624  0.878  1.0
  O  O20  1  0.948  0.720  0.111  1.0
  O  O21  1  0.447  0.201  0.620  1.0
  O  O22  1  0.201  0.447  0.380  1.0
  O  O23  1  0.720  0.948  0.889  1.0
[/CIF]
.