The compound described by Ba3Nd3Co6O17 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(4), two equivalent O(1), two equivalent O(2), three equivalent O(5), and four equivalent O(3) atoms to form BaO12 cuboctahedra that share  a cornercorner with one Ba(2)O12 cuboctahedra, corners with three equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Co(2)O6 octahedra, faces with three equivalent Co(1)O6 octahedra, and faces with three equivalent Co(3)O5 square pyramids. In the second Ba site, Ba(2) is bonded to two equivalent O(4), two equivalent O(5), four equivalent O(1), and four equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Co(1)O6 octahedra, faces with four equivalent Co(2)O6 octahedra, and faces with two equivalent Co(3)O5 square pyramids. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 11-coordinate geometry to two equivalent O(2), two equivalent O(3), three equivalent O(6), and four equivalent O(1) atoms. In the second Nd site, Nd(2) is bonded in a 10-coordinate geometry to two equivalent O(6), four equivalent O(2), and four equivalent O(3) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O5 square pyramids,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the second Co site, Co(2) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, corners with two equivalent Co(3)O5 square pyramids, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third Co site, Co(3) is bonded to one O(5), two equivalent O(2), and two equivalent O(3) atoms to form CoO5 square pyramids that share corners with two equivalent Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-18°. There are six inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Co(2) atoms to form distorted OBa4Co2 octahedra that share corners with two equivalent O(4)Ba4Co2 octahedra, corners with two equivalent O(5)Ba4Co2 octahedra, corners with four equivalent O(1)Ba2Nd2Co2 octahedra, edges with four equivalent O(5)Ba4Co2 octahedra, and faces with four equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(5) is bonded to one Ba(2), three equivalent Ba(1), one Co(1), and one Co(3) atom to form distorted OBa4Co2 octahedra that share  a cornercorner with one O(4)Ba4Co2 octahedra, corners with three equivalent O(5)Ba4Co2 octahedra, corners with six equivalent O(1)Ba2Nd2Co2 octahedra, edges with two equivalent O(4)Ba4Co2 octahedra, edges with two equivalent O(5)Ba4Co2 octahedra, and faces with two equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the third O site, O(6) is bonded in a distorted linear geometry to one Nd(2), three equivalent Nd(1), one Co(1), and one Co(2) atom. In the fourth O site, O(1) is bonded to one Ba(1), one Ba(2), two equivalent Nd(1), one Co(1), and one Co(2) atom to form distorted OBa2Nd2Co2 octahedra that share  a cornercorner with one O(4)Ba4Co2 octahedra, corners with three equivalent O(5)Ba4Co2 octahedra, corners with four equivalent O(1)Ba2Nd2Co2 octahedra,  an edgeedge with one O(1)Ba2Nd2Co2 octahedra,  a faceface with one O(4)Ba4Co2 octahedra,  a faceface with one O(5)Ba4Co2 octahedra, and faces with two equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fifth O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), one Nd(2), one Co(2), and one Co(3) atom. In the sixth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Nd(1), one Nd(2), one Co(1), and one Co(3) atom. is represented by the CIF card [CIF]
data_Ba3Nd3Co6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.602
_cell_length_b   8.602
_cell_length_c   9.496
_cell_angle_alpha   58.644
_cell_angle_beta   58.644
_cell_angle_gamma   38.226
_symmetry_Int_Tables_number   1
_cell_volume   362.913
_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
  Ba  Ba0  1  0.333  0.333  0.332  1.0
  Ba  Ba1  1  0.667  0.667  0.668  1.0
  Ba  Ba2  1  0.000  0.000  0.000  1.0
  Nd  Nd3  1  0.174  0.174  0.151  1.0
  Nd  Nd4  1  0.500  0.500  0.500  1.0
  Nd  Nd5  1  0.826  0.826  0.849  1.0
  Co  Co6  1  0.253  0.253  0.747  1.0
  Co  Co7  1  0.582  0.582  0.089  1.0
  Co  Co8  1  0.919  0.919  0.418  1.0
  Co  Co9  1  0.418  0.418  0.911  1.0
  Co  Co10  1  0.747  0.747  0.253  1.0
  Co  Co11  1  0.081  0.081  0.582  1.0
  O  O12  1  0.922  0.428  0.927  1.0
  O  O13  1  0.249  0.768  0.270  1.0
  O  O14  1  0.619  0.089  0.589  1.0
  O  O15  1  0.428  0.922  0.927  1.0
  O  O16  1  0.768  0.249  0.270  1.0
  O  O17  1  0.089  0.619  0.589  1.0
  O  O18  1  0.078  0.572  0.073  1.0
  O  O19  1  0.381  0.911  0.411  1.0
  O  O20  1  0.751  0.232  0.730  1.0
  O  O21  1  0.572  0.078  0.073  1.0
  O  O22  1  0.911  0.381  0.411  1.0
  O  O23  1  0.232  0.751  0.730  1.0
  O  O24  1  0.500  0.500  0.000  1.0
  O  O25  1  0.824  0.824  0.334  1.0
  O  O26  1  0.176  0.176  0.666  1.0
  O  O27  1  0.668  0.668  0.165  1.0
  O  O28  1  0.332  0.332  0.835  1.0
[/CIF]
.
The compound described by Ba3Nd3Co6O17 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(4), two equivalent O(1), two equivalent O(2), three equivalent O(5), and four equivalent O(3) atoms to form BaO12 cuboctahedra that share  a cornercorner with one Ba(2)O12 cuboctahedra, corners with three equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Co(2)O6 octahedra, faces with three equivalent Co(1)O6 octahedra, and faces with three equivalent Co(3)O5 square pyramids. In the second Ba site, Ba(2) is bonded to two equivalent O(4), two equivalent O(5), four equivalent O(1), and four equivalent O(2) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Co(1)O6 octahedra, faces with four equivalent Co(2)O6 octahedra, and faces with two equivalent Co(3)O5 square pyramids. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 11-coordinate geometry to two equivalent O(2), two equivalent O(3), three equivalent O(6), and four equivalent O(1) atoms. In the second Nd site, Nd(2) is bonded in a 10-coordinate geometry to two equivalent O(6), four equivalent O(2), and four equivalent O(3) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O5 square pyramids,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-10°. In the second Co site, Co(2) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, corners with two equivalent Co(3)O5 square pyramids, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third Co site, Co(3) is bonded to one O(5), two equivalent O(2), and two equivalent O(3) atoms to form CoO5 square pyramids that share corners with two equivalent Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a faceface with one Ba(2)O12 cuboctahedra, and faces with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-18°. There are six inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Co(2) atoms to form distorted OBa4Co2 octahedra that share corners with two equivalent O(4)Ba4Co2 octahedra, corners with two equivalent O(5)Ba4Co2 octahedra, corners with four equivalent O(1)Ba2Nd2Co2 octahedra, edges with four equivalent O(5)Ba4Co2 octahedra, and faces with four equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(5) is bonded to one Ba(2), three equivalent Ba(1), one Co(1), and one Co(3) atom to form distorted OBa4Co2 octahedra that share  a cornercorner with one O(4)Ba4Co2 octahedra, corners with three equivalent O(5)Ba4Co2 octahedra, corners with six equivalent O(1)Ba2Nd2Co2 octahedra, edges with two equivalent O(4)Ba4Co2 octahedra, edges with two equivalent O(5)Ba4Co2 octahedra, and faces with two equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the third O site, O(6) is bonded in a distorted linear geometry to one Nd(2), three equivalent Nd(1), one Co(1), and one Co(2) atom. In the fourth O site, O(1) is bonded to one Ba(1), one Ba(2), two equivalent Nd(1), one Co(1), and one Co(2) atom to form distorted OBa2Nd2Co2 octahedra that share  a cornercorner with one O(4)Ba4Co2 octahedra, corners with three equivalent O(5)Ba4Co2 octahedra, corners with four equivalent O(1)Ba2Nd2Co2 octahedra,  an edgeedge with one O(1)Ba2Nd2Co2 octahedra,  a faceface with one O(4)Ba4Co2 octahedra,  a faceface with one O(5)Ba4Co2 octahedra, and faces with two equivalent O(1)Ba2Nd2Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fifth O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), one Nd(2), one Co(2), and one Co(3) atom. In the sixth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Nd(1), one Nd(2), one Co(1), and one Co(3) atom. is represented by the CIF card [CIF]
data_Ba3Nd3Co6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.602
_cell_length_b   8.602
_cell_length_c   9.496
_cell_angle_alpha   58.644
_cell_angle_beta   58.644
_cell_angle_gamma   38.226
_symmetry_Int_Tables_number   1
_cell_volume   362.913
_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
  Ba  Ba0  1  0.333  0.333  0.332  1.0
  Ba  Ba1  1  0.667  0.667  0.668  1.0
  Ba  Ba2  1  0.000  0.000  0.000  1.0
  Nd  Nd3  1  0.174  0.174  0.151  1.0
  Nd  Nd4  1  0.500  0.500  0.500  1.0
  Nd  Nd5  1  0.826  0.826  0.849  1.0
  Co  Co6  1  0.253  0.253  0.747  1.0
  Co  Co7  1  0.582  0.582  0.089  1.0
  Co  Co8  1  0.919  0.919  0.418  1.0
  Co  Co9  1  0.418  0.418  0.911  1.0
  Co  Co10  1  0.747  0.747  0.253  1.0
  Co  Co11  1  0.081  0.081  0.582  1.0
  O  O12  1  0.922  0.428  0.927  1.0
  O  O13  1  0.249  0.768  0.270  1.0
  O  O14  1  0.619  0.089  0.589  1.0
  O  O15  1  0.428  0.922  0.927  1.0
  O  O16  1  0.768  0.249  0.270  1.0
  O  O17  1  0.089  0.619  0.589  1.0
  O  O18  1  0.078  0.572  0.073  1.0
  O  O19  1  0.381  0.911  0.411  1.0
  O  O20  1  0.751  0.232  0.730  1.0
  O  O21  1  0.572  0.078  0.073  1.0
  O  O22  1  0.911  0.381  0.411  1.0
  O  O23  1  0.232  0.751  0.730  1.0
  O  O24  1  0.500  0.500  0.000  1.0
  O  O25  1  0.824  0.824  0.334  1.0
  O  O26  1  0.176  0.176  0.666  1.0
  O  O27  1  0.668  0.668  0.165  1.0
  O  O28  1  0.332  0.332  0.835  1.0
[/CIF]
.