The compound described by Ba8CaU4Y2O24 crystallizes in the orthorhombic Cmmm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(11), one O(9), two equivalent O(2), two equivalent O(3), two equivalent O(8), and four equivalent O(1) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ca(1)O6 octahedra, faces with two equivalent U(1)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(11), one O(6), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ca(1)O6 octahedra,  a faceface with one U(1)O6 octahedra,  a faceface with one U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the third Ba site, Ba(3) is bonded to one O(10), one O(6), two equivalent O(3), two equivalent O(5), two equivalent O(7), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ca(2)O6 octahedra, faces with two equivalent U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the fourth Ba site, Ba(4) is bonded to one O(10), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ca(2)O6 octahedra,  a faceface with one U(1)O6 octahedra,  a faceface with one U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent O(11) and four equivalent O(2) atoms to form CaO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with four equivalent U(3)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Ca site, Ca(2) is bonded to two equivalent O(10) and four equivalent O(5) atoms to form CaO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with four equivalent U(3)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are three inequivalent U sites. In the first U site, U(1) is bonded to one O(11), one O(9), and four equivalent O(1) atoms to form UO6 octahedra that share  a cornercorner with one Ca(1)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second U site, U(2) is bonded to one O(10), one O(6), and four equivalent O(4) atoms to form UO6 octahedra that share  a cornercorner with one Ca(2)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third U site, U(3) is bonded to one O(2), one O(5), one O(7), one O(8), and two equivalent O(3) atoms to form UO6 octahedra that share  a cornercorner with one Ca(1)O6 octahedra,  a cornercorner with one Ca(2)O6 octahedra, corners with two equivalent Y(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-2°. Y(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form YO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with two equivalent U(2)O6 octahedra, corners with two equivalent U(3)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-4°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(1), one U(1), and one Y(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Ca(1), and one U(3) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one U(3), and one Y(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(3), one U(2), and one Y(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Ca(2), and one U(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Ba(2), two equivalent Ba(3), and one U(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Ba(2), two equivalent Ba(3), and one U(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Ba(1), two equivalent Ba(4), and one U(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to two equivalent Ba(1), two equivalent Ba(4), and one U(1) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Ca(2), and one U(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Ca(1), and one U(1) atom. is represented by the CIF card [CIF]
data_Ba8CaY2U4O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.765
_cell_length_b   8.765
_cell_length_c   10.768
_cell_angle_alpha   113.985
_cell_angle_beta   113.985
_cell_angle_gamma   90.070
_symmetry_Int_Tables_number   1
_cell_volume   676.764
_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  0.649  0.649  0.766  1.0
  Ba  Ba1  1  0.883  0.883  0.234  1.0
  Ba  Ba2  1  0.118  0.645  0.763  1.0
  Ba  Ba3  1  0.882  0.355  0.237  1.0
  Ba  Ba4  1  0.351  0.351  0.234  1.0
  Ba  Ba5  1  0.117  0.117  0.766  1.0
  Ba  Ba6  1  0.645  0.118  0.763  1.0
  Ba  Ba7  1  0.355  0.882  0.237  1.0
  Ca  Ca8  1  0.500  0.500  0.000  1.0
  O  O9  1  0.491  0.248  0.496  1.0
  O  O10  1  0.502  0.762  1.000  1.0
  O  O11  1  0.623  0.123  0.245  1.0
  O  O12  1  0.238  0.498  1.000  1.0
  O  O13  1  0.498  0.238  1.000  1.0
  O  O14  1  0.752  0.995  0.504  1.0
  O  O15  1  0.248  0.005  0.496  1.0
  O  O16  1  0.861  0.861  0.723  1.0
  O  O17  1  0.730  0.003  1.000  1.0
  O  O18  1  0.003  0.730  1.000  1.0
  O  O19  1  0.139  0.139  0.277  1.0
  O  O20  1  0.248  0.491  0.496  1.0
  O  O21  1  0.995  0.752  0.504  1.0
  O  O22  1  0.368  0.368  0.736  1.0
  O  O23  1  0.752  0.509  0.504  1.0
  O  O24  1  0.632  0.632  0.264  1.0
  O  O25  1  0.270  0.997  1.000  1.0
  O  O26  1  0.997  0.270  1.000  1.0
  O  O27  1  0.877  0.377  0.755  1.0
  O  O28  1  0.762  0.502  1.000  1.0
  O  O29  1  0.377  0.877  0.755  1.0
  O  O30  1  0.509  0.752  0.504  1.0
  O  O31  1  0.005  0.248  0.496  1.0
  O  O32  1  0.123  0.623  0.245  1.0
  U  U33  1  0.253  0.253  0.507  1.0
  U  U34  1  0.500  0.000  1.000  1.0
  U  U35  1  0.747  0.747  0.493  1.0
  U  U36  1  0.000  0.500  1.000  1.0
  Y  Y37  1  0.250  0.750  0.500  1.0
  Y  Y38  1  0.750  0.250  0.500  1.0
[/CIF]
.
The compound described by Ba8CaU4Y2O24 crystallizes in the orthorhombic Cmmm space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(11), one O(9), two equivalent O(2), two equivalent O(3), two equivalent O(8), and four equivalent O(1) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ca(1)O6 octahedra, faces with two equivalent U(1)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the second Ba site, Ba(2) is bonded to one O(11), one O(6), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ca(1)O6 octahedra,  a faceface with one U(1)O6 octahedra,  a faceface with one U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the third Ba site, Ba(3) is bonded to one O(10), one O(6), two equivalent O(3), two equivalent O(5), two equivalent O(7), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with two equivalent Ba(1)O12 cuboctahedra, corners with two equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ca(2)O6 octahedra, faces with two equivalent U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. In the fourth Ba site, Ba(4) is bonded to one O(10), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with two equivalent Ba(2)O12 cuboctahedra, corners with two equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra,  a faceface with one Ca(2)O6 octahedra,  a faceface with one U(1)O6 octahedra,  a faceface with one U(2)O6 octahedra, faces with two equivalent U(3)O6 octahedra, and faces with two equivalent Y(1)O6 octahedra. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to two equivalent O(11) and four equivalent O(2) atoms to form CaO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with four equivalent U(3)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Ca site, Ca(2) is bonded to two equivalent O(10) and four equivalent O(5) atoms to form CaO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with four equivalent U(3)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are three inequivalent U sites. In the first U site, U(1) is bonded to one O(11), one O(9), and four equivalent O(1) atoms to form UO6 octahedra that share  a cornercorner with one Ca(1)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second U site, U(2) is bonded to one O(10), one O(6), and four equivalent O(4) atoms to form UO6 octahedra that share  a cornercorner with one Ca(2)O6 octahedra, corners with four equivalent Y(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(4)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third U site, U(3) is bonded to one O(2), one O(5), one O(7), one O(8), and two equivalent O(3) atoms to form UO6 octahedra that share  a cornercorner with one Ca(1)O6 octahedra,  a cornercorner with one Ca(2)O6 octahedra, corners with two equivalent Y(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-2°. Y(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form YO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with two equivalent U(2)O6 octahedra, corners with two equivalent U(3)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(3)O12 cuboctahedra, and faces with two equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-4°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(1), one U(1), and one Y(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Ca(1), and one U(3) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Ba(1), one Ba(2), one Ba(3), one Ba(4), one U(3), and one Y(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Ba(2), one Ba(4), two equivalent Ba(3), one U(2), and one Y(1) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Ca(2), and one U(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Ba(2), two equivalent Ba(3), and one U(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Ba(2), two equivalent Ba(3), and one U(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Ba(1), two equivalent Ba(4), and one U(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to two equivalent Ba(1), two equivalent Ba(4), and one U(1) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Ca(2), and one U(2) atom. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), one Ca(1), and one U(1) atom. is represented by the CIF card [CIF]
data_Ba8CaY2U4O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.765
_cell_length_b   8.765
_cell_length_c   10.768
_cell_angle_alpha   113.985
_cell_angle_beta   113.985
_cell_angle_gamma   90.070
_symmetry_Int_Tables_number   1
_cell_volume   676.764
_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  0.649  0.649  0.766  1.0
  Ba  Ba1  1  0.883  0.883  0.234  1.0
  Ba  Ba2  1  0.118  0.645  0.763  1.0
  Ba  Ba3  1  0.882  0.355  0.237  1.0
  Ba  Ba4  1  0.351  0.351  0.234  1.0
  Ba  Ba5  1  0.117  0.117  0.766  1.0
  Ba  Ba6  1  0.645  0.118  0.763  1.0
  Ba  Ba7  1  0.355  0.882  0.237  1.0
  Ca  Ca8  1  0.500  0.500  0.000  1.0
  O  O9  1  0.491  0.248  0.496  1.0
  O  O10  1  0.502  0.762  1.000  1.0
  O  O11  1  0.623  0.123  0.245  1.0
  O  O12  1  0.238  0.498  1.000  1.0
  O  O13  1  0.498  0.238  1.000  1.0
  O  O14  1  0.752  0.995  0.504  1.0
  O  O15  1  0.248  0.005  0.496  1.0
  O  O16  1  0.861  0.861  0.723  1.0
  O  O17  1  0.730  0.003  1.000  1.0
  O  O18  1  0.003  0.730  1.000  1.0
  O  O19  1  0.139  0.139  0.277  1.0
  O  O20  1  0.248  0.491  0.496  1.0
  O  O21  1  0.995  0.752  0.504  1.0
  O  O22  1  0.368  0.368  0.736  1.0
  O  O23  1  0.752  0.509  0.504  1.0
  O  O24  1  0.632  0.632  0.264  1.0
  O  O25  1  0.270  0.997  1.000  1.0
  O  O26  1  0.997  0.270  1.000  1.0
  O  O27  1  0.877  0.377  0.755  1.0
  O  O28  1  0.762  0.502  1.000  1.0
  O  O29  1  0.377  0.877  0.755  1.0
  O  O30  1  0.509  0.752  0.504  1.0
  O  O31  1  0.005  0.248  0.496  1.0
  O  O32  1  0.123  0.623  0.245  1.0
  U  U33  1  0.253  0.253  0.507  1.0
  U  U34  1  0.500  0.000  1.000  1.0
  U  U35  1  0.747  0.747  0.493  1.0
  U  U36  1  0.000  0.500  1.000  1.0
  Y  Y37  1  0.250  0.750  0.500  1.0
  Y  Y38  1  0.750  0.250  0.500  1.0
[/CIF]
.