The compound described by La8Ni4O17 crystallizes in the monoclinic C2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), one O(7), one O(9), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(9), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 10-19°. In the second Ni site, Ni(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. In the third Ni site, Ni(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 4-19°. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(3), one La(4), and one Ni(1) atom. In the second O site, O(1) is bonded to one La(3), one La(4), two equivalent La(1), one Ni(1), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share corners with five equivalent O(3)La5Ni octahedra,  a cornercorner with one O(7)La4 tetrahedra, edges with two equivalent O(5)La4Ni2 octahedra,  an edgeedge with one O(7)La4 tetrahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra, and  a faceface with one O(8)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 46-56°. In the third O site, O(2) is bonded in a 4-coordinate geometry to one La(2), one La(3), one La(4), two equivalent La(1), and one Ni(3) atom. In the fourth O site, O(3) is bonded to one La(1), one La(2), one La(4), two equivalent La(3), and one Ni(2) atom to form distorted OLa5Ni octahedra that share  a cornercorner with one O(5)La4Ni2 octahedra,  a cornercorner with one O(8)La4Ni2 octahedra,  a cornercorner with one O(3)La5Ni octahedra, corners with five equivalent O(1)La4Ni2 octahedra, corners with two equivalent O(7)La4 tetrahedra,  an edgeedge with one O(3)La5Ni octahedra, faces with two equivalent O(5)La4Ni2 octahedra, and faces with two equivalent O(8)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), two equivalent La(2), and one Ni(3) atom. In the sixth O site, O(5) is bonded to one La(3), one La(4), two equivalent La(1), one Ni(2), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share  a cornercorner with one O(3)La5Ni octahedra, corners with two equivalent O(8)La4Ni2 octahedra, corners with three equivalent O(7)La4 tetrahedra, edges with two equivalent O(1)La4Ni2 octahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra,  a faceface with one O(8)La4Ni2 octahedra, and faces with two equivalent O(3)La5Ni octahedra. The corner-sharing octahedral tilt angles range from 3-49°. In the seventh O site, O(6) is bonded in a 6-coordinate geometry to one La(3), one La(4), two equivalent La(2), one Ni(1), and one Ni(3) atom. In the eighth O site, O(7) is bonded to two equivalent La(1) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4Ni2 octahedra, corners with two equivalent O(8)La4Ni2 octahedra, corners with four equivalent O(3)La5Ni octahedra, corners with six equivalent O(5)La4Ni2 octahedra, and edges with two equivalent O(1)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 9-69°. In the ninth O site, O(8) is bonded to one La(3), one La(4), two equivalent La(2), one Ni(2), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share  a cornercorner with one O(3)La5Ni octahedra, corners with two equivalent O(5)La4Ni2 octahedra,  a cornercorner with one O(7)La4 tetrahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra,  a faceface with one O(8)La4Ni2 octahedra, and faces with two equivalent O(3)La5Ni octahedra. The corner-sharing octahedral tilt angles range from 3-48°. is represented by the CIF file [CIF]
data_La8Ni4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.817
_cell_length_b   7.817
_cell_length_c   6.932
_cell_angle_alpha   73.162
_cell_angle_beta   73.162
_cell_angle_gamma   89.091
_symmetry_Int_Tables_number   1
_cell_volume   386.975
_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
  La  La0  1  0.676  0.179  0.287  1.0
  La  La1  1  0.821  0.324  0.713  1.0
  La  La2  1  0.166  0.678  0.281  1.0
  La  La3  1  0.680  0.684  0.277  1.0
  La  La4  1  0.808  0.831  0.708  1.0
  La  La5  1  0.322  0.834  0.719  1.0
  La  La6  1  0.316  0.320  0.723  1.0
  La  La7  1  0.169  0.192  0.292  1.0
  Ni  Ni8  1  0.999  0.001  0.000  1.0
  Ni  Ni9  1  0.496  0.504  0.000  1.0
  Ni  Ni10  1  0.492  0.004  0.008  1.0
  Ni  Ni11  1  0.996  0.508  0.992  1.0
  O  O12  1  0.747  0.010  0.977  1.0
  O  O13  1  0.914  0.480  0.338  1.0
  O  O14  1  0.411  0.418  0.342  1.0
  O  O15  1  0.081  0.569  0.648  1.0
  O  O16  1  0.500  0.253  0.990  1.0
  O  O17  1  0.237  0.996  0.055  1.0
  O  O18  1  0.873  0.127  0.500  1.0
  O  O19  1  0.239  0.502  0.007  1.0
  O  O20  1  0.004  0.763  0.945  1.0
  O  O21  1  0.895  0.863  0.329  1.0
  O  O22  1  0.137  0.105  0.671  1.0
  O  O23  1  0.520  0.086  0.662  1.0
  O  O24  1  0.990  0.253  0.023  1.0
  O  O25  1  0.498  0.761  0.993  1.0
  O  O26  1  0.747  0.500  0.010  1.0
  O  O27  1  0.582  0.589  0.658  1.0
  O  O28  1  0.431  0.919  0.352  1.0
[/CIF]
.
The compound described by La8Ni4O17 crystallizes in the monoclinic C2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(3), one O(4), one O(7), one O(9), two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(9), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 10-19°. In the second Ni site, Ni(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. In the third Ni site, Ni(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 4-19°. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(3), one La(4), and one Ni(1) atom. In the second O site, O(1) is bonded to one La(3), one La(4), two equivalent La(1), one Ni(1), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share corners with five equivalent O(3)La5Ni octahedra,  a cornercorner with one O(7)La4 tetrahedra, edges with two equivalent O(5)La4Ni2 octahedra,  an edgeedge with one O(7)La4 tetrahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra, and  a faceface with one O(8)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 46-56°. In the third O site, O(2) is bonded in a 4-coordinate geometry to one La(2), one La(3), one La(4), two equivalent La(1), and one Ni(3) atom. In the fourth O site, O(3) is bonded to one La(1), one La(2), one La(4), two equivalent La(3), and one Ni(2) atom to form distorted OLa5Ni octahedra that share  a cornercorner with one O(5)La4Ni2 octahedra,  a cornercorner with one O(8)La4Ni2 octahedra,  a cornercorner with one O(3)La5Ni octahedra, corners with five equivalent O(1)La4Ni2 octahedra, corners with two equivalent O(7)La4 tetrahedra,  an edgeedge with one O(3)La5Ni octahedra, faces with two equivalent O(5)La4Ni2 octahedra, and faces with two equivalent O(8)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), two equivalent La(2), and one Ni(3) atom. In the sixth O site, O(5) is bonded to one La(3), one La(4), two equivalent La(1), one Ni(2), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share  a cornercorner with one O(3)La5Ni octahedra, corners with two equivalent O(8)La4Ni2 octahedra, corners with three equivalent O(7)La4 tetrahedra, edges with two equivalent O(1)La4Ni2 octahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra,  a faceface with one O(8)La4Ni2 octahedra, and faces with two equivalent O(3)La5Ni octahedra. The corner-sharing octahedral tilt angles range from 3-49°. In the seventh O site, O(6) is bonded in a 6-coordinate geometry to one La(3), one La(4), two equivalent La(2), one Ni(1), and one Ni(3) atom. In the eighth O site, O(7) is bonded to two equivalent La(1) and two equivalent La(4) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4Ni2 octahedra, corners with two equivalent O(8)La4Ni2 octahedra, corners with four equivalent O(3)La5Ni octahedra, corners with six equivalent O(5)La4Ni2 octahedra, and edges with two equivalent O(1)La4Ni2 octahedra. The corner-sharing octahedral tilt angles range from 9-69°. In the ninth O site, O(8) is bonded to one La(3), one La(4), two equivalent La(2), one Ni(2), and one Ni(3) atom to form distorted OLa4Ni2 octahedra that share  a cornercorner with one O(3)La5Ni octahedra, corners with two equivalent O(5)La4Ni2 octahedra,  a cornercorner with one O(7)La4 tetrahedra,  a faceface with one O(1)La4Ni2 octahedra,  a faceface with one O(5)La4Ni2 octahedra,  a faceface with one O(8)La4Ni2 octahedra, and faces with two equivalent O(3)La5Ni octahedra. The corner-sharing octahedral tilt angles range from 3-48°. is represented by the CIF file [CIF]
data_La8Ni4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.817
_cell_length_b   7.817
_cell_length_c   6.932
_cell_angle_alpha   73.162
_cell_angle_beta   73.162
_cell_angle_gamma   89.091
_symmetry_Int_Tables_number   1
_cell_volume   386.975
_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
  La  La0  1  0.676  0.179  0.287  1.0
  La  La1  1  0.821  0.324  0.713  1.0
  La  La2  1  0.166  0.678  0.281  1.0
  La  La3  1  0.680  0.684  0.277  1.0
  La  La4  1  0.808  0.831  0.708  1.0
  La  La5  1  0.322  0.834  0.719  1.0
  La  La6  1  0.316  0.320  0.723  1.0
  La  La7  1  0.169  0.192  0.292  1.0
  Ni  Ni8  1  0.999  0.001  0.000  1.0
  Ni  Ni9  1  0.496  0.504  0.000  1.0
  Ni  Ni10  1  0.492  0.004  0.008  1.0
  Ni  Ni11  1  0.996  0.508  0.992  1.0
  O  O12  1  0.747  0.010  0.977  1.0
  O  O13  1  0.914  0.480  0.338  1.0
  O  O14  1  0.411  0.418  0.342  1.0
  O  O15  1  0.081  0.569  0.648  1.0
  O  O16  1  0.500  0.253  0.990  1.0
  O  O17  1  0.237  0.996  0.055  1.0
  O  O18  1  0.873  0.127  0.500  1.0
  O  O19  1  0.239  0.502  0.007  1.0
  O  O20  1  0.004  0.763  0.945  1.0
  O  O21  1  0.895  0.863  0.329  1.0
  O  O22  1  0.137  0.105  0.671  1.0
  O  O23  1  0.520  0.086  0.662  1.0
  O  O24  1  0.990  0.253  0.023  1.0
  O  O25  1  0.498  0.761  0.993  1.0
  O  O26  1  0.747  0.500  0.010  1.0
  O  O27  1  0.582  0.589  0.658  1.0
  O  O28  1  0.431  0.919  0.352  1.0
[/CIF]
.