The structure described by SmY15O24 is Spinel-like structured and crystallizes in the monoclinic C2 space group. Sm(1) is bonded to two equivalent O(12), two equivalent O(3), and two equivalent O(8) atoms to form distorted SmO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with two equivalent Y(5)O6 octahedra, corners with two equivalent Y(6)O6 octahedra, edges with two equivalent Y(2)O6 octahedra, edges with two equivalent Y(4)O6 octahedra, and edges with two equivalent Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. There are nine inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the second Y site, Y(2) is bonded to one O(10), one O(12), one O(2), one O(3), one O(4), and one O(9) atom to form YO6 octahedra that share  a cornercorner with one Y(3)O6 octahedra,  a cornercorner with one Y(4)O6 octahedra,  a cornercorner with one Y(5)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra,  a cornercorner with one Y(9)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(3)O6 octahedra,  an edgeedge with one Y(4)O6 octahedra,  an edgeedge with one Y(5)O6 octahedra, and  an edgeedge with one Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. In the third Y site, Y(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form distorted YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra, corners with two equivalent Y(5)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra, and edges with two equivalent Y(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the fourth Y site, Y(4) is bonded to one O(1), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form distorted YO6 octahedra that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra, corners with two equivalent Y(9)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and edges with two equivalent Y(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-56°. In the fifth Y site, Y(5) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(7) atom to form distorted YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra, corners with two equivalent Y(3)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra, and edges with two equivalent Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the sixth Y site, Y(6) is bonded to one O(1), one O(11), one O(5), one O(6), one O(7), and one O(8) atom to form YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(3)O6 octahedra,  a cornercorner with one Y(4)O6 octahedra,  a cornercorner with one Y(5)O6 octahedra,  a cornercorner with one Y(9)O6 octahedra,  an edgeedge with one Y(3)O6 octahedra,  an edgeedge with one Y(4)O6 octahedra,  an edgeedge with one Y(5)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and  an edgeedge with one Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the seventh Y site, Y(7) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(5) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the eighth Y site, Y(8) is bonded to two equivalent O(11), two equivalent O(6), and two equivalent O(9) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the ninth Y site, Y(9) is bonded to one O(10), one O(11), one O(12), one O(3), one O(6), and one O(7) atom to form distorted YO6 octahedra that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra, corners with two equivalent Y(4)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and edges with two equivalent Y(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-56°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Y(3), one Y(4), one Y(6), and one Y(7) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(5)Y4 trigonal pyramids. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(4)Y4 trigonal pyramids. In the third O site, O(3) is bonded to one Sm(1), one Y(2), one Y(4), and one Y(9) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(12)SmY3 trigonal pyramids. In the fourth O site, O(4) is bonded to one Y(1), one Y(2), one Y(3), and one Y(5) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(2)Y4 trigonal pyramids. In the fifth O site, O(5) is bonded to one Y(3), one Y(5), one Y(6), and one Y(7) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(1)Y4 trigonal pyramids. In the sixth O site, O(6) is bonded to one Y(4), one Y(6), one Y(8), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(11)Y4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Y(1), one Y(5), one Y(6), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(12)SmY3 trigonal pyramid,  an edgeedge with one O(11)Y4 trigonal pyramid,  an edgeedge with one O(4)Y4 trigonal pyramid, and  an edgeedge with one O(5)Y4 trigonal pyramid. In the eighth O site, O(8) is bonded to one Sm(1), one Y(3), one Y(4), and one Y(6) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(3)SmY3 trigonal pyramid,  an edgeedge with one O(1)Y4 trigonal pyramid,  an edgeedge with one O(2)Y4 trigonal pyramid, and  an edgeedge with one O(6)Y4 trigonal pyramid. In the ninth O site, O(9) is bonded to one Y(2), one Y(3), one Y(4), and one Y(8) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(3)SmY3 trigonal pyramid,  an edgeedge with one O(1)Y4 trigonal pyramid,  an edgeedge with one O(2)Y4 trigonal pyramid, and  an edgeedge with one O(6)Y4 trigonal pyramid. In the tenth O site, O(10) is bonded to one Y(2), one Y(5), one Y(7), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(12)SmY3 trigonal pyramid,  an edgeedge with one O(11)Y4 trigonal pyramid,  an edgeedge with one O(4)Y4 trigonal pyramid, and  an edgeedge with one O(5)Y4 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Y(5), one Y(6), one Y(8), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(6)Y4 trigonal pyramids. In the twelfth O site, O(12) is bonded to one Sm(1), one Y(2), one Y(5), and one Y(9) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(3)SmY3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmY15O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.198
_cell_length_b   9.198
_cell_length_c   10.625
_cell_angle_alpha   54.805
_cell_angle_beta   54.805
_cell_angle_gamma   70.607
_symmetry_Int_Tables_number   1
_cell_volume   600.271
_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
  Sm  Sm0  1  0.032  0.968  0.500  1.0
  Y  Y1  1  0.968  0.032  0.000  1.0
  Y  Y2  1  1.000  0.498  0.751  1.0
  Y  Y3  1  0.716  0.218  0.783  1.0
  Y  Y4  1  0.782  0.284  0.217  1.0
  Y  Y5  1  0.250  0.251  0.031  1.0
  Y  Y6  1  0.251  0.250  0.533  1.0
  Y  Y7  1  0.502  0.000  0.249  1.0
  Y  Y8  1  1.000  0.502  0.248  1.0
  Y  Y9  1  0.498  0.000  0.752  1.0
  Y  Y10  1  0.533  0.467  0.500  1.0
  Y  Y11  1  0.467  0.533  0.000  1.0
  Y  Y12  1  0.750  0.749  0.467  1.0
  Y  Y13  1  0.749  0.750  0.969  1.0
  Y  Y14  1  0.218  0.716  0.282  1.0
  Y  Y15  1  0.284  0.782  0.718  1.0
  O  O16  1  0.457  0.240  0.781  1.0
  O  O17  1  0.042  0.261  0.978  1.0
  O  O18  1  0.031  0.725  0.766  1.0
  O  O19  1  0.729  0.032  0.261  1.0
  O  O20  1  0.532  0.228  0.480  1.0
  O  O21  1  0.230  0.532  0.979  1.0
  O  O22  1  0.760  0.543  0.219  1.0
  O  O23  1  0.739  0.958  0.022  1.0
  O  O24  1  0.229  0.989  0.793  1.0
  O  O25  1  0.989  0.235  0.287  1.0
  O  O26  1  0.511  0.271  0.011  1.0
  O  O27  1  0.271  0.511  0.511  1.0
  O  O28  1  0.011  0.771  0.207  1.0
  O  O29  1  0.489  0.729  0.489  1.0
  O  O30  1  0.765  0.011  0.713  1.0
  O  O31  1  0.729  0.489  0.989  1.0
  O  O32  1  0.238  0.457  0.282  1.0
  O  O33  1  0.266  0.042  0.477  1.0
  O  O34  1  0.772  0.468  0.520  1.0
  O  O35  1  0.468  0.770  0.021  1.0
  O  O36  1  0.275  0.969  0.234  1.0
  O  O37  1  0.968  0.271  0.739  1.0
  O  O38  1  0.543  0.762  0.718  1.0
  O  O39  1  0.958  0.734  0.523  1.0
[/CIF]
.
The structure described by SmY15O24 is Spinel-like structured and crystallizes in the monoclinic C2 space group. Sm(1) is bonded to two equivalent O(12), two equivalent O(3), and two equivalent O(8) atoms to form distorted SmO6 octahedra that share corners with two equivalent Y(3)O6 octahedra, corners with two equivalent Y(5)O6 octahedra, corners with two equivalent Y(6)O6 octahedra, edges with two equivalent Y(2)O6 octahedra, edges with two equivalent Y(4)O6 octahedra, and edges with two equivalent Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. There are nine inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(7) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the second Y site, Y(2) is bonded to one O(10), one O(12), one O(2), one O(3), one O(4), and one O(9) atom to form YO6 octahedra that share  a cornercorner with one Y(3)O6 octahedra,  a cornercorner with one Y(4)O6 octahedra,  a cornercorner with one Y(5)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra,  a cornercorner with one Y(9)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(3)O6 octahedra,  an edgeedge with one Y(4)O6 octahedra,  an edgeedge with one Y(5)O6 octahedra, and  an edgeedge with one Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. In the third Y site, Y(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form distorted YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra, corners with two equivalent Y(5)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra, and edges with two equivalent Y(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the fourth Y site, Y(4) is bonded to one O(1), one O(2), one O(3), one O(6), one O(8), and one O(9) atom to form distorted YO6 octahedra that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra, corners with two equivalent Y(9)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and edges with two equivalent Y(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-56°. In the fifth Y site, Y(5) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(7) atom to form distorted YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(8)O6 octahedra, corners with two equivalent Y(3)O6 octahedra,  an edgeedge with one Y(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra, and edges with two equivalent Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the sixth Y site, Y(6) is bonded to one O(1), one O(11), one O(5), one O(6), one O(7), and one O(8) atom to form YO6 octahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(3)O6 octahedra,  a cornercorner with one Y(4)O6 octahedra,  a cornercorner with one Y(5)O6 octahedra,  a cornercorner with one Y(9)O6 octahedra,  an edgeedge with one Y(3)O6 octahedra,  an edgeedge with one Y(4)O6 octahedra,  an edgeedge with one Y(5)O6 octahedra,  an edgeedge with one Y(7)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and  an edgeedge with one Y(9)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the seventh Y site, Y(7) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(5) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the eighth Y site, Y(8) is bonded to two equivalent O(11), two equivalent O(6), and two equivalent O(9) atoms to form a mixture of distorted edge and corner-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the ninth Y site, Y(9) is bonded to one O(10), one O(11), one O(12), one O(3), one O(6), and one O(7) atom to form distorted YO6 octahedra that share  a cornercorner with one Y(1)O6 octahedra,  a cornercorner with one Y(2)O6 octahedra,  a cornercorner with one Y(6)O6 octahedra,  a cornercorner with one Y(7)O6 octahedra, corners with two equivalent Y(4)O6 octahedra,  an edgeedge with one Sm(1)O6 octahedra,  an edgeedge with one Y(2)O6 octahedra,  an edgeedge with one Y(6)O6 octahedra,  an edgeedge with one Y(8)O6 octahedra, and edges with two equivalent Y(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-56°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Y(3), one Y(4), one Y(6), and one Y(7) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(5)Y4 trigonal pyramids. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(4)Y4 trigonal pyramids. In the third O site, O(3) is bonded to one Sm(1), one Y(2), one Y(4), and one Y(9) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(12)SmY3 trigonal pyramids. In the fourth O site, O(4) is bonded to one Y(1), one Y(2), one Y(3), and one Y(5) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(2)Y4 trigonal pyramids. In the fifth O site, O(5) is bonded to one Y(3), one Y(5), one Y(6), and one Y(7) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(1)Y4 trigonal pyramids. In the sixth O site, O(6) is bonded to one Y(4), one Y(6), one Y(8), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(8)SmY3 trigonal pyramid,  an edgeedge with one O(9)Y4 trigonal pyramid, and edges with two equivalent O(11)Y4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Y(1), one Y(5), one Y(6), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(10)Y4 trigonal pyramids, corners with two equivalent O(2)Y4 trigonal pyramids, corners with two equivalent O(6)Y4 trigonal pyramids,  an edgeedge with one O(12)SmY3 trigonal pyramid,  an edgeedge with one O(11)Y4 trigonal pyramid,  an edgeedge with one O(4)Y4 trigonal pyramid, and  an edgeedge with one O(5)Y4 trigonal pyramid. In the eighth O site, O(8) is bonded to one Sm(1), one Y(3), one Y(4), and one Y(6) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(3)SmY3 trigonal pyramid,  an edgeedge with one O(1)Y4 trigonal pyramid,  an edgeedge with one O(2)Y4 trigonal pyramid, and  an edgeedge with one O(6)Y4 trigonal pyramid. In the ninth O site, O(9) is bonded to one Y(2), one Y(3), one Y(4), and one Y(8) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(3)SmY3 trigonal pyramid,  an edgeedge with one O(1)Y4 trigonal pyramid,  an edgeedge with one O(2)Y4 trigonal pyramid, and  an edgeedge with one O(6)Y4 trigonal pyramid. In the tenth O site, O(10) is bonded to one Y(2), one Y(5), one Y(7), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(3)SmY3 trigonal pyramids, corners with two equivalent O(1)Y4 trigonal pyramids, corners with two equivalent O(7)Y4 trigonal pyramids,  an edgeedge with one O(12)SmY3 trigonal pyramid,  an edgeedge with one O(11)Y4 trigonal pyramid,  an edgeedge with one O(4)Y4 trigonal pyramid, and  an edgeedge with one O(5)Y4 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Y(5), one Y(6), one Y(8), and one Y(9) atom to form OY4 trigonal pyramids that share  a cornercorner with one O(3)SmY3 trigonal pyramid,  a cornercorner with one O(8)SmY3 trigonal pyramid,  a cornercorner with one O(1)Y4 trigonal pyramid,  a cornercorner with one O(11)Y4 trigonal pyramid,  a cornercorner with one O(4)Y4 trigonal pyramid,  a cornercorner with one O(7)Y4 trigonal pyramid, corners with two equivalent O(12)SmY3 trigonal pyramids, corners with two equivalent O(5)Y4 trigonal pyramids, corners with two equivalent O(9)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(6)Y4 trigonal pyramids. In the twelfth O site, O(12) is bonded to one Sm(1), one Y(2), one Y(5), and one Y(9) atom to form OSmY3 trigonal pyramids that share  a cornercorner with one O(12)SmY3 trigonal pyramid,  a cornercorner with one O(10)Y4 trigonal pyramid,  a cornercorner with one O(2)Y4 trigonal pyramid,  a cornercorner with one O(5)Y4 trigonal pyramid,  a cornercorner with one O(6)Y4 trigonal pyramid,  a cornercorner with one O(9)Y4 trigonal pyramid, corners with two equivalent O(8)SmY3 trigonal pyramids, corners with two equivalent O(11)Y4 trigonal pyramids, corners with two equivalent O(4)Y4 trigonal pyramids,  an edgeedge with one O(10)Y4 trigonal pyramid,  an edgeedge with one O(7)Y4 trigonal pyramid, and edges with two equivalent O(3)SmY3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmY15O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.198
_cell_length_b   9.198
_cell_length_c   10.625
_cell_angle_alpha   54.805
_cell_angle_beta   54.805
_cell_angle_gamma   70.607
_symmetry_Int_Tables_number   1
_cell_volume   600.271
_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
  Sm  Sm0  1  0.032  0.968  0.500  1.0
  Y  Y1  1  0.968  0.032  0.000  1.0
  Y  Y2  1  1.000  0.498  0.751  1.0
  Y  Y3  1  0.716  0.218  0.783  1.0
  Y  Y4  1  0.782  0.284  0.217  1.0
  Y  Y5  1  0.250  0.251  0.031  1.0
  Y  Y6  1  0.251  0.250  0.533  1.0
  Y  Y7  1  0.502  0.000  0.249  1.0
  Y  Y8  1  1.000  0.502  0.248  1.0
  Y  Y9  1  0.498  0.000  0.752  1.0
  Y  Y10  1  0.533  0.467  0.500  1.0
  Y  Y11  1  0.467  0.533  0.000  1.0
  Y  Y12  1  0.750  0.749  0.467  1.0
  Y  Y13  1  0.749  0.750  0.969  1.0
  Y  Y14  1  0.218  0.716  0.282  1.0
  Y  Y15  1  0.284  0.782  0.718  1.0
  O  O16  1  0.457  0.240  0.781  1.0
  O  O17  1  0.042  0.261  0.978  1.0
  O  O18  1  0.031  0.725  0.766  1.0
  O  O19  1  0.729  0.032  0.261  1.0
  O  O20  1  0.532  0.228  0.480  1.0
  O  O21  1  0.230  0.532  0.979  1.0
  O  O22  1  0.760  0.543  0.219  1.0
  O  O23  1  0.739  0.958  0.022  1.0
  O  O24  1  0.229  0.989  0.793  1.0
  O  O25  1  0.989  0.235  0.287  1.0
  O  O26  1  0.511  0.271  0.011  1.0
  O  O27  1  0.271  0.511  0.511  1.0
  O  O28  1  0.011  0.771  0.207  1.0
  O  O29  1  0.489  0.729  0.489  1.0
  O  O30  1  0.765  0.011  0.713  1.0
  O  O31  1  0.729  0.489  0.989  1.0
  O  O32  1  0.238  0.457  0.282  1.0
  O  O33  1  0.266  0.042  0.477  1.0
  O  O34  1  0.772  0.468  0.520  1.0
  O  O35  1  0.468  0.770  0.021  1.0
  O  O36  1  0.275  0.969  0.234  1.0
  O  O37  1  0.968  0.271  0.739  1.0
  O  O38  1  0.543  0.762  0.718  1.0
  O  O39  1  0.958  0.734  0.523  1.0
[/CIF]
.