The material described by BaLa2O4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a trigonal planar geometry to one O(6) and two equivalent O(3) atoms. There are three inequivalent La sites. In the first La site, La(1) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form a mixture of face and corner-sharing LaO6 octahedra. The corner-sharing octahedral tilt angles range from 29-32°. In the second La site, La(2) is bonded to one O(2), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form a mixture of distorted face, corner, and edge-sharing LaO6 octahedra. The corner-sharing octahedra are not tilted. In the third La site, La(3) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(7), and two equivalent O(1) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(2) and two equivalent La(3) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent O(2)BaLa3 tetrahedra, corners with two equivalent O(5)BaLa3 tetrahedra,  an edgeedge with one O(2)BaLa3 tetrahedra,  an edgeedge with one O(5)BaLa3 tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. In the second O site, O(2) is bonded to one Ba(1), one La(1), one La(2), and one La(3) atom to form distorted OBaLa3 tetrahedra that share corners with two equivalent O(5)BaLa3 tetrahedra, corners with two equivalent O(1)La4 tetrahedra,  an edgeedge with one O(5)BaLa3 tetrahedra, and  an edgeedge with one O(1)La4 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), and two equivalent La(1) atoms. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Ba(1), one La(1), one La(2), and one La(3) atom. In the fifth O site, O(5) is bonded to one Ba(1), one La(1), one La(2), and one La(3) atom to form distorted OBaLa3 tetrahedra that share corners with two equivalent O(2)BaLa3 tetrahedra, corners with two equivalent O(1)La4 tetrahedra,  an edgeedge with one O(2)BaLa3 tetrahedra, and  an edgeedge with one O(1)La4 tetrahedra. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), and two equivalent La(1) atoms. In the seventh O site, O(7) is bonded in a distorted square co-planar geometry to two equivalent La(2) and two equivalent La(3) atoms. is represented by the CIF file [CIF]
data_BaLa2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.413
_cell_length_b   6.413
_cell_length_c   23.549
_cell_angle_alpha   89.366
_cell_angle_beta   89.366
_cell_angle_gamma   61.143
_symmetry_Int_Tables_number   1
_cell_volume   848.141
_cell_formula_units_Z   6
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
  Ba  Ba0  1  0.448  0.227  0.651  1.0
  Ba  Ba1  1  0.227  0.448  0.151  1.0
  Ba  Ba2  1  0.110  0.890  0.750  1.0
  Ba  Ba3  1  0.890  0.110  0.250  1.0
  Ba  Ba4  1  0.552  0.773  0.349  1.0
  Ba  Ba5  1  0.773  0.552  0.849  1.0
  La  La6  1  0.443  0.218  0.806  1.0
  La  La7  1  0.218  0.443  0.306  1.0
  La  La8  1  0.446  0.227  0.950  1.0
  La  La9  1  0.227  0.446  0.450  1.0
  La  La10  1  0.109  0.883  0.926  1.0
  La  La11  1  0.883  0.109  0.426  1.0
  La  La12  1  0.891  0.117  0.074  1.0
  La  La13  1  0.117  0.891  0.574  1.0
  La  La14  1  0.773  0.554  0.550  1.0
  La  La15  1  0.554  0.773  0.050  1.0
  La  La16  1  0.782  0.557  0.694  1.0
  La  La17  1  0.557  0.782  0.194  1.0
  O  O18  1  0.211  0.079  0.003  1.0
  O  O19  1  0.079  0.211  0.503  1.0
  O  O20  1  0.380  0.963  0.876  1.0
  O  O21  1  0.963  0.380  0.376  1.0
  O  O22  1  0.303  0.101  0.253  1.0
  O  O23  1  0.101  0.303  0.753  1.0
  O  O24  1  0.197  0.529  0.879  1.0
  O  O25  1  0.529  0.197  0.379  1.0
  O  O26  1  0.149  0.768  0.376  1.0
  O  O27  1  0.768  0.149  0.876  1.0
  O  O28  1  0.511  0.489  0.750  1.0
  O  O29  1  0.500  0.500  0.500  1.0
  O  O30  1  0.500  0.500  0.000  1.0
  O  O31  1  0.489  0.511  0.250  1.0
  O  O32  1  0.232  0.851  0.124  1.0
  O  O33  1  0.851  0.232  0.624  1.0
  O  O34  1  0.471  0.803  0.621  1.0
  O  O35  1  0.803  0.471  0.121  1.0
  O  O36  1  0.697  0.899  0.747  1.0
  O  O37  1  0.899  0.697  0.247  1.0
  O  O38  1  0.037  0.620  0.624  1.0
  O  O39  1  0.620  0.037  0.124  1.0
  O  O40  1  0.789  0.921  0.997  1.0
  O  O41  1  0.921  0.789  0.497  1.0
[/CIF]
.
The material described by BaLa2O4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a trigonal planar geometry to one O(6) and two equivalent O(3) atoms. There are three inequivalent La sites. In the first La site, La(1) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form a mixture of face and corner-sharing LaO6 octahedra. The corner-sharing octahedral tilt angles range from 29-32°. In the second La site, La(2) is bonded to one O(2), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form a mixture of distorted face, corner, and edge-sharing LaO6 octahedra. The corner-sharing octahedra are not tilted. In the third La site, La(3) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(7), and two equivalent O(1) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(2) and two equivalent La(3) atoms to form distorted OLa4 tetrahedra that share corners with two equivalent O(2)BaLa3 tetrahedra, corners with two equivalent O(5)BaLa3 tetrahedra,  an edgeedge with one O(2)BaLa3 tetrahedra,  an edgeedge with one O(5)BaLa3 tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. In the second O site, O(2) is bonded to one Ba(1), one La(1), one La(2), and one La(3) atom to form distorted OBaLa3 tetrahedra that share corners with two equivalent O(5)BaLa3 tetrahedra, corners with two equivalent O(1)La4 tetrahedra,  an edgeedge with one O(5)BaLa3 tetrahedra, and  an edgeedge with one O(1)La4 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), and two equivalent La(1) atoms. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Ba(1), one La(1), one La(2), and one La(3) atom. In the fifth O site, O(5) is bonded to one Ba(1), one La(1), one La(2), and one La(3) atom to form distorted OBaLa3 tetrahedra that share corners with two equivalent O(2)BaLa3 tetrahedra, corners with two equivalent O(1)La4 tetrahedra,  an edgeedge with one O(2)BaLa3 tetrahedra, and  an edgeedge with one O(1)La4 tetrahedra. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), and two equivalent La(1) atoms. In the seventh O site, O(7) is bonded in a distorted square co-planar geometry to two equivalent La(2) and two equivalent La(3) atoms. is represented by the CIF file [CIF]
data_BaLa2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.413
_cell_length_b   6.413
_cell_length_c   23.549
_cell_angle_alpha   89.366
_cell_angle_beta   89.366
_cell_angle_gamma   61.143
_symmetry_Int_Tables_number   1
_cell_volume   848.141
_cell_formula_units_Z   6
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
  Ba  Ba0  1  0.448  0.227  0.651  1.0
  Ba  Ba1  1  0.227  0.448  0.151  1.0
  Ba  Ba2  1  0.110  0.890  0.750  1.0
  Ba  Ba3  1  0.890  0.110  0.250  1.0
  Ba  Ba4  1  0.552  0.773  0.349  1.0
  Ba  Ba5  1  0.773  0.552  0.849  1.0
  La  La6  1  0.443  0.218  0.806  1.0
  La  La7  1  0.218  0.443  0.306  1.0
  La  La8  1  0.446  0.227  0.950  1.0
  La  La9  1  0.227  0.446  0.450  1.0
  La  La10  1  0.109  0.883  0.926  1.0
  La  La11  1  0.883  0.109  0.426  1.0
  La  La12  1  0.891  0.117  0.074  1.0
  La  La13  1  0.117  0.891  0.574  1.0
  La  La14  1  0.773  0.554  0.550  1.0
  La  La15  1  0.554  0.773  0.050  1.0
  La  La16  1  0.782  0.557  0.694  1.0
  La  La17  1  0.557  0.782  0.194  1.0
  O  O18  1  0.211  0.079  0.003  1.0
  O  O19  1  0.079  0.211  0.503  1.0
  O  O20  1  0.380  0.963  0.876  1.0
  O  O21  1  0.963  0.380  0.376  1.0
  O  O22  1  0.303  0.101  0.253  1.0
  O  O23  1  0.101  0.303  0.753  1.0
  O  O24  1  0.197  0.529  0.879  1.0
  O  O25  1  0.529  0.197  0.379  1.0
  O  O26  1  0.149  0.768  0.376  1.0
  O  O27  1  0.768  0.149  0.876  1.0
  O  O28  1  0.511  0.489  0.750  1.0
  O  O29  1  0.500  0.500  0.500  1.0
  O  O30  1  0.500  0.500  0.000  1.0
  O  O31  1  0.489  0.511  0.250  1.0
  O  O32  1  0.232  0.851  0.124  1.0
  O  O33  1  0.851  0.232  0.624  1.0
  O  O34  1  0.471  0.803  0.621  1.0
  O  O35  1  0.803  0.471  0.121  1.0
  O  O36  1  0.697  0.899  0.747  1.0
  O  O37  1  0.899  0.697  0.247  1.0
  O  O38  1  0.037  0.620  0.624  1.0
  O  O39  1  0.620  0.037  0.124  1.0
  O  O40  1  0.789  0.921  0.997  1.0
  O  O41  1  0.921  0.789  0.497  1.0
[/CIF]
.