The structure described by MgSm2Mo2(O15I4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(12), one O(18), one O(26), one O(3), and one O(30) atom to form MgO5 trigonal bipyramids that share  an edgeedge with one Mo(2)O6 octahedra. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(15), one O(17), one O(23), one O(27), one O(4), and one O(6) atom. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(12), one O(16), one O(18), one O(24), one O(28), one O(3), one O(5), and one O(9) atom. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(25), one O(27), one O(29), and one O(7) atom. In the second Mo site, Mo(2) is bonded to one O(14), one O(2), one O(26), one O(28), one O(30), and one O(8) atom to form distorted MoO6 octahedra that share  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are thirty inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mo(1) and one I(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mo(2) and one I(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Sm(2), and one I(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sm(2) and one I(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sm(1) and one I(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Mo(1) and one I(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(2) and one I(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Sm(2) and one I(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one I(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mg(1), one Sm(2), and one I(4) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Mo(1) and one I(5) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Mo(2) and one I(6) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one I(5) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Sm(2) and one I(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one I(5) atom. In the eighteenth O site, O(18) is bonded in a distorted T-shaped geometry to one Mg(1), one Sm(2), and one I(6) atom. In the nineteenth O site, O(19) is bonded in a distorted single-bond geometry to one I(7) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one I(1) and one I(8) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 120 degrees geometry to one I(6) and one I(7) atom. In the twenty-second O site, O(22) is bonded in a distorted single-bond geometry to one I(5) and one I(8) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Sm(2) and one I(8) atom. In the twenty-fifth O site, O(25) is bonded in a distorted single-bond geometry to one Mo(1) and one I(7) atom. In the twenty-sixth O site, O(26) is bonded in an L-shaped geometry to one Mg(1) and one Mo(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to one Sm(1) and one Mo(1) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Sm(2) and one Mo(2) atom. In the twenty-ninth O site, O(29) is bonded in a single-bond geometry to one Mo(1) atom. In the thirtieth O site, O(30) is bonded in a distorted L-shaped geometry to one Mg(1) and one Mo(2) atom. There are eight inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(20), one O(3), and one O(5) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(11), one O(7), and one O(9) atom. In the fourth I site, I(4) is bonded in a 3-coordinate geometry to one O(10), one O(12), and one O(8) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(13), one O(15), one O(17), and one O(22) atom. In the sixth I site, I(6) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(16), one O(18), and one O(21) atom. In the seventh I site, I(7) is bonded in a distorted see-saw-like geometry to one O(19), one O(21), one O(23), and one O(25) atom. In the eighth I site, I(8) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(22), and one O(24) atom. is represented by the CIF file [CIF]
data_Sm2MgMo2(I4O15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.242
_cell_length_b   7.210
_cell_length_c   14.291
_cell_angle_alpha   91.960
_cell_angle_beta   88.621
_cell_angle_gamma   114.855
_symmetry_Int_Tables_number   1
_cell_volume   676.662
_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  0.086  0.422  0.440  1.0
  Sm  Sm1  1  0.885  0.563  0.953  1.0
  Mg  Mg2  1  0.217  0.432  0.855  1.0
  Mo  Mo3  1  0.585  0.773  0.279  1.0
  Mo  Mo4  1  0.455  0.247  0.765  1.0
  I  I5  1  0.496  0.748  0.038  1.0
  I  I6  1  0.490  0.244  0.519  1.0
  I  I7  1  0.747  0.286  0.198  1.0
  I  I8  1  0.268  0.728  0.681  1.0
  I  I9  1  0.155  0.927  0.317  1.0
  I  I10  1  0.834  0.033  0.798  1.0
  I  I11  1  0.762  0.867  0.541  1.0
  I  I12  1  0.226  0.124  0.053  1.0
  O  O13  1  0.376  0.680  0.152  1.0
  O  O14  1  0.608  0.292  0.639  1.0
  O  O15  1  0.259  0.616  0.968  1.0
  O  O16  1  0.726  0.363  0.454  1.0
  O  O17  1  0.572  0.533  0.018  1.0
  O  O18  1  0.409  0.455  0.523  1.0
  O  O19  1  0.741  0.023  0.180  1.0
  O  O20  1  0.243  0.977  0.686  1.0
  O  O21  1  0.887  0.389  0.090  1.0
  O  O22  1  0.079  0.592  0.594  1.0
  O  O23  1  0.952  0.385  0.282  1.0
  O  O24  1  0.122  0.630  0.792  1.0
  O  O25  1  0.428  0.979  0.299  1.0
  O  O26  1  0.570  0.013  0.790  1.0
  O  O27  1  0.213  0.167  0.381  1.0
  O  O28  1  0.772  0.822  0.875  1.0
  O  O29  1  0.100  0.759  0.417  1.0
  O  O30  1  0.926  0.252  0.890  1.0
  O  O31  1  0.526  0.903  0.538  1.0
  O  O32  1  0.450  0.067  0.038  1.0
  O  O33  1  0.751  0.815  0.669  1.0
  O  O34  1  0.230  0.159  0.179  1.0
  O  O35  1  0.952  0.132  0.545  1.0
  O  O36  1  0.022  0.866  0.038  1.0
  O  O37  1  0.768  0.912  0.368  1.0
  O  O38  1  0.276  0.165  0.864  1.0
  O  O39  1  0.380  0.592  0.342  1.0
  O  O40  1  0.674  0.418  0.825  1.0
  O  O41  1  0.712  0.634  0.225  1.0
  O  O42  1  0.340  0.413  0.729  1.0
[/CIF]
.
The structure described by MgSm2Mo2(O15I4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(12), one O(18), one O(26), one O(3), and one O(30) atom to form MgO5 trigonal bipyramids that share  an edgeedge with one Mo(2)O6 octahedra. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(15), one O(17), one O(23), one O(27), one O(4), and one O(6) atom. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(12), one O(16), one O(18), one O(24), one O(28), one O(3), one O(5), and one O(9) atom. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(25), one O(27), one O(29), and one O(7) atom. In the second Mo site, Mo(2) is bonded to one O(14), one O(2), one O(26), one O(28), one O(30), and one O(8) atom to form distorted MoO6 octahedra that share  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are thirty inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mo(1) and one I(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mo(2) and one I(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Sm(2), and one I(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sm(2) and one I(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sm(1) and one I(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Mo(1) and one I(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Mo(2) and one I(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Sm(2) and one I(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Sm(1) and one I(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mg(1), one Sm(2), and one I(4) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Mo(1) and one I(5) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Mo(2) and one I(6) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one I(5) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 150 degrees geometry to one Sm(2) and one I(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one I(5) atom. In the eighteenth O site, O(18) is bonded in a distorted T-shaped geometry to one Mg(1), one Sm(2), and one I(6) atom. In the nineteenth O site, O(19) is bonded in a distorted single-bond geometry to one I(7) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one I(1) and one I(8) atom. In the twenty-first O site, O(21) is bonded in a distorted bent 120 degrees geometry to one I(6) and one I(7) atom. In the twenty-second O site, O(22) is bonded in a distorted single-bond geometry to one I(5) and one I(8) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one Sm(1) and one I(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Sm(2) and one I(8) atom. In the twenty-fifth O site, O(25) is bonded in a distorted single-bond geometry to one Mo(1) and one I(7) atom. In the twenty-sixth O site, O(26) is bonded in an L-shaped geometry to one Mg(1) and one Mo(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted linear geometry to one Sm(1) and one Mo(1) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Sm(2) and one Mo(2) atom. In the twenty-ninth O site, O(29) is bonded in a single-bond geometry to one Mo(1) atom. In the thirtieth O site, O(30) is bonded in a distorted L-shaped geometry to one Mg(1) and one Mo(2) atom. There are eight inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(20), one O(3), and one O(5) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(11), one O(7), and one O(9) atom. In the fourth I site, I(4) is bonded in a 3-coordinate geometry to one O(10), one O(12), and one O(8) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(13), one O(15), one O(17), and one O(22) atom. In the sixth I site, I(6) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(16), one O(18), and one O(21) atom. In the seventh I site, I(7) is bonded in a distorted see-saw-like geometry to one O(19), one O(21), one O(23), and one O(25) atom. In the eighth I site, I(8) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(22), and one O(24) atom. is represented by the CIF file [CIF]
data_Sm2MgMo2(I4O15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.242
_cell_length_b   7.210
_cell_length_c   14.291
_cell_angle_alpha   91.960
_cell_angle_beta   88.621
_cell_angle_gamma   114.855
_symmetry_Int_Tables_number   1
_cell_volume   676.662
_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  0.086  0.422  0.440  1.0
  Sm  Sm1  1  0.885  0.563  0.953  1.0
  Mg  Mg2  1  0.217  0.432  0.855  1.0
  Mo  Mo3  1  0.585  0.773  0.279  1.0
  Mo  Mo4  1  0.455  0.247  0.765  1.0
  I  I5  1  0.496  0.748  0.038  1.0
  I  I6  1  0.490  0.244  0.519  1.0
  I  I7  1  0.747  0.286  0.198  1.0
  I  I8  1  0.268  0.728  0.681  1.0
  I  I9  1  0.155  0.927  0.317  1.0
  I  I10  1  0.834  0.033  0.798  1.0
  I  I11  1  0.762  0.867  0.541  1.0
  I  I12  1  0.226  0.124  0.053  1.0
  O  O13  1  0.376  0.680  0.152  1.0
  O  O14  1  0.608  0.292  0.639  1.0
  O  O15  1  0.259  0.616  0.968  1.0
  O  O16  1  0.726  0.363  0.454  1.0
  O  O17  1  0.572  0.533  0.018  1.0
  O  O18  1  0.409  0.455  0.523  1.0
  O  O19  1  0.741  0.023  0.180  1.0
  O  O20  1  0.243  0.977  0.686  1.0
  O  O21  1  0.887  0.389  0.090  1.0
  O  O22  1  0.079  0.592  0.594  1.0
  O  O23  1  0.952  0.385  0.282  1.0
  O  O24  1  0.122  0.630  0.792  1.0
  O  O25  1  0.428  0.979  0.299  1.0
  O  O26  1  0.570  0.013  0.790  1.0
  O  O27  1  0.213  0.167  0.381  1.0
  O  O28  1  0.772  0.822  0.875  1.0
  O  O29  1  0.100  0.759  0.417  1.0
  O  O30  1  0.926  0.252  0.890  1.0
  O  O31  1  0.526  0.903  0.538  1.0
  O  O32  1  0.450  0.067  0.038  1.0
  O  O33  1  0.751  0.815  0.669  1.0
  O  O34  1  0.230  0.159  0.179  1.0
  O  O35  1  0.952  0.132  0.545  1.0
  O  O36  1  0.022  0.866  0.038  1.0
  O  O37  1  0.768  0.912  0.368  1.0
  O  O38  1  0.276  0.165  0.864  1.0
  O  O39  1  0.380  0.592  0.342  1.0
  O  O40  1  0.674  0.418  0.825  1.0
  O  O41  1  0.712  0.634  0.225  1.0
  O  O42  1  0.340  0.413  0.729  1.0
[/CIF]
.