The structure described by CaSm4(Mo2O7)2 crystallizes in the monoclinic Cm space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(5), one O(9), two equivalent O(2), and two equivalent O(7) atoms. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(9), two equivalent O(6), and two equivalent O(7) atoms. In the second Sm site, Sm(2) is bonded to one O(1), one O(10), one O(4), one O(9), two equivalent O(2), and two equivalent O(3) atoms to form distorted SmO8 hexagonal bipyramids that share edges with two equivalent Mo(3)O6 octahedra and edges with four equivalent Mo(2)O6 octahedra. In the third Sm site, Sm(3) is bonded in a 7-coordinate geometry to 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 Mo sites. In the first Mo site, Mo(1) is bonded to one O(5), one O(8), two equivalent O(6), and two equivalent O(7) atoms to form corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. In the second Mo site, Mo(2) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom to form MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, corners with two equivalent Mo(3)O6 octahedra, and edges with two equivalent Sm(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 43-55°. In the third Mo site, Mo(3) is bonded to one O(5), one O(8), two equivalent O(2), and two equivalent O(3) atoms to form distorted MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra, and edges with two equivalent Sm(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 48-64°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Sm(2), and two equivalent Mo(2) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Sm(2), one Mo(2), and one Mo(3) atom. In the third O site, O(3) is bonded to one Sm(2), one Sm(3), one Mo(2), and one Mo(3) atom to form OSm2Mo2 tetrahedra that share corners with two equivalent O(10)Sm2Mo2 tetrahedra, corners with two equivalent O(3)Sm2Mo2 tetrahedra, corners with two equivalent O(4)Sm4 tetrahedra,  an edgeedge with one O(6)Sm2Mo2 tetrahedra,  an edgeedge with one O(8)Sm2Mo2 tetrahedra, and  an edgeedge with one O(9)CaSm4 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Sm(1), one Sm(2), and two equivalent Sm(3) atoms to form OSm4 tetrahedra that share corners with two equivalent O(10)Sm2Mo2 tetrahedra, corners with four equivalent O(3)Sm2Mo2 tetrahedra, corners with four equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(8)Sm2Mo2 tetrahedra, and edges with two equivalent O(6)Sm2Mo2 tetrahedra. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Sm(3), one Mo(1), and one Mo(3) atom. In the sixth O site, O(6) is bonded to one Sm(1), one Sm(3), one Mo(1), and one Mo(2) atom to form OSm2Mo2 tetrahedra that share corners with two equivalent O(6)Sm2Mo2 tetrahedra, corners with two equivalent O(8)Sm2Mo2 tetrahedra, corners with two equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(10)Sm2Mo2 tetrahedra,  an edgeedge with one O(3)Sm2Mo2 tetrahedra, and  an edgeedge with one O(4)Sm4 tetrahedra. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ca(1), one Sm(1), one Sm(3), one Mo(1), and one Mo(2) atom. In the eighth O site, O(8) is bonded to two equivalent Sm(3), one Mo(1), and one Mo(3) atom to form OSm2Mo2 tetrahedra that share corners with four equivalent O(6)Sm2Mo2 tetrahedra, corners with two equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(4)Sm4 tetrahedra, and edges with two equivalent O(3)Sm2Mo2 tetrahedra. In the ninth O site, O(9) is bonded to one Ca(1), one Sm(1), one Sm(2), and two equivalent Sm(3) atoms to form OCaSm4 trigonal bipyramids that share corners with two equivalent O(8)Sm2Mo2 tetrahedra, corners with four equivalent O(6)Sm2Mo2 tetrahedra, corners with four equivalent O(4)Sm4 tetrahedra,  an edgeedge with one O(10)Sm2Mo2 tetrahedra, and edges with two equivalent O(3)Sm2Mo2 tetrahedra. In the tenth O site, O(10) is bonded to one Sm(1), one Sm(2), and two equivalent Mo(2) atoms to form distorted OSm2Mo2 tetrahedra that share corners with two equivalent O(4)Sm4 tetrahedra, corners with four equivalent O(3)Sm2Mo2 tetrahedra, edges with two equivalent O(6)Sm2Mo2 tetrahedra, and  an edgeedge with one O(9)CaSm4 trigonal bipyramid. is represented by the CIF file [CIF]
data_CaSm4(Mo2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.727
_cell_length_b   7.717
_cell_length_c   7.727
_cell_angle_alpha   58.923
_cell_angle_beta   59.065
_cell_angle_gamma   58.925
_symmetry_Int_Tables_number   1
_cell_volume   318.181
_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
  Ca  Ca0  1  0.749  0.742  0.749  1.0
  Sm  Sm1  1  0.471  0.999  0.471  1.0
  Sm  Sm2  1  0.495  0.493  0.495  1.0
  Sm  Sm3  1  0.476  0.465  0.004  1.0
  Sm  Sm4  1  0.004  0.465  0.476  1.0
  Mo  Mo5  1  0.003  0.006  0.003  1.0
  Mo  Mo6  1  0.005  0.006  0.496  1.0
  Mo  Mo7  1  0.496  0.006  0.005  1.0
  Mo  Mo8  1  0.008  0.498  0.008  1.0
  O  O9  1  0.680  0.097  0.680  1.0
  O  O10  1  0.103  0.679  0.668  1.0
  O  O11  1  0.905  0.334  0.345  1.0
  O  O12  1  0.668  0.679  0.103  1.0
  O  O13  1  0.375  0.367  0.375  1.0
  O  O14  1  0.896  0.366  0.896  1.0
  O  O15  1  0.096  0.086  0.651  1.0
  O  O16  1  0.356  0.922  0.904  1.0
  O  O17  1  0.345  0.334  0.905  1.0
  O  O18  1  0.102  0.650  0.102  1.0
  O  O19  1  0.621  0.626  0.621  1.0
  O  O20  1  0.333  0.914  0.333  1.0
  O  O21  1  0.904  0.922  0.356  1.0
  O  O22  1  0.651  0.086  0.096  1.0
[/CIF]
.
The structure described by CaSm4(Mo2O7)2 crystallizes in the monoclinic Cm space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(5), one O(9), two equivalent O(2), and two equivalent O(7) atoms. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(9), two equivalent O(6), and two equivalent O(7) atoms. In the second Sm site, Sm(2) is bonded to one O(1), one O(10), one O(4), one O(9), two equivalent O(2), and two equivalent O(3) atoms to form distorted SmO8 hexagonal bipyramids that share edges with two equivalent Mo(3)O6 octahedra and edges with four equivalent Mo(2)O6 octahedra. In the third Sm site, Sm(3) is bonded in a 7-coordinate geometry to 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 Mo sites. In the first Mo site, Mo(1) is bonded to one O(5), one O(8), two equivalent O(6), and two equivalent O(7) atoms to form corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. In the second Mo site, Mo(2) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom to form MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, corners with two equivalent Mo(3)O6 octahedra, and edges with two equivalent Sm(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 43-55°. In the third Mo site, Mo(3) is bonded to one O(5), one O(8), two equivalent O(2), and two equivalent O(3) atoms to form distorted MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with four equivalent Mo(2)O6 octahedra, and edges with two equivalent Sm(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 48-64°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ca(1), one Sm(2), and two equivalent Mo(2) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Sm(2), one Mo(2), and one Mo(3) atom. In the third O site, O(3) is bonded to one Sm(2), one Sm(3), one Mo(2), and one Mo(3) atom to form OSm2Mo2 tetrahedra that share corners with two equivalent O(10)Sm2Mo2 tetrahedra, corners with two equivalent O(3)Sm2Mo2 tetrahedra, corners with two equivalent O(4)Sm4 tetrahedra,  an edgeedge with one O(6)Sm2Mo2 tetrahedra,  an edgeedge with one O(8)Sm2Mo2 tetrahedra, and  an edgeedge with one O(9)CaSm4 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Sm(1), one Sm(2), and two equivalent Sm(3) atoms to form OSm4 tetrahedra that share corners with two equivalent O(10)Sm2Mo2 tetrahedra, corners with four equivalent O(3)Sm2Mo2 tetrahedra, corners with four equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(8)Sm2Mo2 tetrahedra, and edges with two equivalent O(6)Sm2Mo2 tetrahedra. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ca(1), two equivalent Sm(3), one Mo(1), and one Mo(3) atom. In the sixth O site, O(6) is bonded to one Sm(1), one Sm(3), one Mo(1), and one Mo(2) atom to form OSm2Mo2 tetrahedra that share corners with two equivalent O(6)Sm2Mo2 tetrahedra, corners with two equivalent O(8)Sm2Mo2 tetrahedra, corners with two equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(10)Sm2Mo2 tetrahedra,  an edgeedge with one O(3)Sm2Mo2 tetrahedra, and  an edgeedge with one O(4)Sm4 tetrahedra. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Ca(1), one Sm(1), one Sm(3), one Mo(1), and one Mo(2) atom. In the eighth O site, O(8) is bonded to two equivalent Sm(3), one Mo(1), and one Mo(3) atom to form OSm2Mo2 tetrahedra that share corners with four equivalent O(6)Sm2Mo2 tetrahedra, corners with two equivalent O(9)CaSm4 trigonal bipyramids,  an edgeedge with one O(4)Sm4 tetrahedra, and edges with two equivalent O(3)Sm2Mo2 tetrahedra. In the ninth O site, O(9) is bonded to one Ca(1), one Sm(1), one Sm(2), and two equivalent Sm(3) atoms to form OCaSm4 trigonal bipyramids that share corners with two equivalent O(8)Sm2Mo2 tetrahedra, corners with four equivalent O(6)Sm2Mo2 tetrahedra, corners with four equivalent O(4)Sm4 tetrahedra,  an edgeedge with one O(10)Sm2Mo2 tetrahedra, and edges with two equivalent O(3)Sm2Mo2 tetrahedra. In the tenth O site, O(10) is bonded to one Sm(1), one Sm(2), and two equivalent Mo(2) atoms to form distorted OSm2Mo2 tetrahedra that share corners with two equivalent O(4)Sm4 tetrahedra, corners with four equivalent O(3)Sm2Mo2 tetrahedra, edges with two equivalent O(6)Sm2Mo2 tetrahedra, and  an edgeedge with one O(9)CaSm4 trigonal bipyramid. is represented by the CIF file [CIF]
data_CaSm4(Mo2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.727
_cell_length_b   7.717
_cell_length_c   7.727
_cell_angle_alpha   58.923
_cell_angle_beta   59.065
_cell_angle_gamma   58.925
_symmetry_Int_Tables_number   1
_cell_volume   318.181
_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
  Ca  Ca0  1  0.749  0.742  0.749  1.0
  Sm  Sm1  1  0.471  0.999  0.471  1.0
  Sm  Sm2  1  0.495  0.493  0.495  1.0
  Sm  Sm3  1  0.476  0.465  0.004  1.0
  Sm  Sm4  1  0.004  0.465  0.476  1.0
  Mo  Mo5  1  0.003  0.006  0.003  1.0
  Mo  Mo6  1  0.005  0.006  0.496  1.0
  Mo  Mo7  1  0.496  0.006  0.005  1.0
  Mo  Mo8  1  0.008  0.498  0.008  1.0
  O  O9  1  0.680  0.097  0.680  1.0
  O  O10  1  0.103  0.679  0.668  1.0
  O  O11  1  0.905  0.334  0.345  1.0
  O  O12  1  0.668  0.679  0.103  1.0
  O  O13  1  0.375  0.367  0.375  1.0
  O  O14  1  0.896  0.366  0.896  1.0
  O  O15  1  0.096  0.086  0.651  1.0
  O  O16  1  0.356  0.922  0.904  1.0
  O  O17  1  0.345  0.334  0.905  1.0
  O  O18  1  0.102  0.650  0.102  1.0
  O  O19  1  0.621  0.626  0.621  1.0
  O  O20  1  0.333  0.914  0.333  1.0
  O  O21  1  0.904  0.922  0.356  1.0
  O  O22  1  0.651  0.086  0.096  1.0
[/CIF]
.