The structure described by LiAlMnO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(4), and three equivalent O(2) atoms. Mn(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Al(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-51°. Al(1) is bonded to one O(4), two equivalent O(3), and three equivalent O(1) atoms to form AlO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-51°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1) and three equivalent Al(1) atoms to form OMnAl3 trigonal pyramids that share  a cornercorner with one O(4)Li2Mn2Al square pyramid, corners with two equivalent O(1)MnAl3 trigonal pyramids, corners with five equivalent O(3)LiMnAl2 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids,  an edgeedge with one O(3)LiMnAl2 trigonal pyramid, and edges with two equivalent O(1)MnAl3 trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Li(1) and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded to one Li(1), one Mn(1), and two equivalent Al(1) atoms to form OLiMnAl2 trigonal pyramids that share corners with two equivalent O(4)Li2Mn2Al square pyramids, corners with two equivalent O(3)LiMnAl2 trigonal pyramids, corners with five equivalent O(1)MnAl3 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids, and  an edgeedge with one O(1)MnAl3 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mn(1), and one Al(1) atom to form OLi2Mn2Al square pyramids that share  a cornercorner with one O(1)MnAl3 trigonal pyramid, corners with two equivalent O(3)LiMnAl2 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids, edges with two equivalent O(3)LiMnAl2 trigonal pyramids, and edges with two equivalent O(1)MnAl3 trigonal pyramids. is represented by the CIF file [CIF]
data_LiMnAlO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.871
_cell_length_b   10.087
_cell_length_c   9.354
_cell_angle_alpha   90.002
_cell_angle_beta   89.999
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   270.930
_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
  Li  Li0  1  0.250  0.623  0.074  1.0
  Li  Li1  1  0.750  0.123  0.426  1.0
  Li  Li2  1  0.250  0.877  0.574  1.0
  Li  Li3  1  0.750  0.377  0.926  1.0
  Mn  Mn4  1  0.250  0.848  0.273  1.0
  Mn  Mn5  1  0.250  0.652  0.773  1.0
  Mn  Mn6  1  0.750  0.348  0.227  1.0
  Mn  Mn7  1  0.750  0.152  0.727  1.0
  Al  Al8  1  0.250  0.126  0.003  1.0
  Al  Al9  1  0.750  0.626  0.497  1.0
  Al  Al10  1  0.250  0.374  0.503  1.0
  Al  Al11  1  0.750  0.874  0.997  1.0
  O  O12  1  0.250  0.963  0.104  1.0
  O  O13  1  0.750  0.463  0.396  1.0
  O  O14  1  0.250  0.537  0.604  1.0
  O  O15  1  0.750  0.037  0.896  1.0
  O  O16  1  0.250  0.436  0.131  1.0
  O  O17  1  0.750  0.936  0.369  1.0
  O  O18  1  0.250  0.064  0.631  1.0
  O  O19  1  0.750  0.564  0.869  1.0
  O  O20  1  0.750  0.214  0.085  1.0
  O  O21  1  0.250  0.714  0.415  1.0
  O  O22  1  0.750  0.286  0.585  1.0
  O  O23  1  0.250  0.786  0.915  1.0
  O  O24  1  0.750  0.758  0.163  1.0
  O  O25  1  0.250  0.258  0.337  1.0
  O  O26  1  0.750  0.742  0.663  1.0
  O  O27  1  0.250  0.242  0.837  1.0
[/CIF]
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The structure described by LiAlMnO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent O(4), and three equivalent O(2) atoms. Mn(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with three equivalent Al(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-51°. Al(1) is bonded to one O(4), two equivalent O(3), and three equivalent O(1) atoms to form AlO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-51°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1) and three equivalent Al(1) atoms to form OMnAl3 trigonal pyramids that share  a cornercorner with one O(4)Li2Mn2Al square pyramid, corners with two equivalent O(1)MnAl3 trigonal pyramids, corners with five equivalent O(3)LiMnAl2 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids,  an edgeedge with one O(3)LiMnAl2 trigonal pyramid, and edges with two equivalent O(1)MnAl3 trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Li(1) and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded to one Li(1), one Mn(1), and two equivalent Al(1) atoms to form OLiMnAl2 trigonal pyramids that share corners with two equivalent O(4)Li2Mn2Al square pyramids, corners with two equivalent O(3)LiMnAl2 trigonal pyramids, corners with five equivalent O(1)MnAl3 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids, and  an edgeedge with one O(1)MnAl3 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Li(1), two equivalent Mn(1), and one Al(1) atom to form OLi2Mn2Al square pyramids that share  a cornercorner with one O(1)MnAl3 trigonal pyramid, corners with two equivalent O(3)LiMnAl2 trigonal pyramids, edges with two equivalent O(4)Li2Mn2Al square pyramids, edges with two equivalent O(3)LiMnAl2 trigonal pyramids, and edges with two equivalent O(1)MnAl3 trigonal pyramids. is represented by the CIF file [CIF]
data_LiMnAlO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.871
_cell_length_b   10.087
_cell_length_c   9.354
_cell_angle_alpha   90.002
_cell_angle_beta   89.999
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   270.930
_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
  Li  Li0  1  0.250  0.623  0.074  1.0
  Li  Li1  1  0.750  0.123  0.426  1.0
  Li  Li2  1  0.250  0.877  0.574  1.0
  Li  Li3  1  0.750  0.377  0.926  1.0
  Mn  Mn4  1  0.250  0.848  0.273  1.0
  Mn  Mn5  1  0.250  0.652  0.773  1.0
  Mn  Mn6  1  0.750  0.348  0.227  1.0
  Mn  Mn7  1  0.750  0.152  0.727  1.0
  Al  Al8  1  0.250  0.126  0.003  1.0
  Al  Al9  1  0.750  0.626  0.497  1.0
  Al  Al10  1  0.250  0.374  0.503  1.0
  Al  Al11  1  0.750  0.874  0.997  1.0
  O  O12  1  0.250  0.963  0.104  1.0
  O  O13  1  0.750  0.463  0.396  1.0
  O  O14  1  0.250  0.537  0.604  1.0
  O  O15  1  0.750  0.037  0.896  1.0
  O  O16  1  0.250  0.436  0.131  1.0
  O  O17  1  0.750  0.936  0.369  1.0
  O  O18  1  0.250  0.064  0.631  1.0
  O  O19  1  0.750  0.564  0.869  1.0
  O  O20  1  0.750  0.214  0.085  1.0
  O  O21  1  0.250  0.714  0.415  1.0
  O  O22  1  0.750  0.286  0.585  1.0
  O  O23  1  0.250  0.786  0.915  1.0
  O  O24  1  0.750  0.758  0.163  1.0
  O  O25  1  0.250  0.258  0.337  1.0
  O  O26  1  0.750  0.742  0.663  1.0
  O  O27  1  0.250  0.242  0.837  1.0
[/CIF]
.