The crystal structure described by MgSm2Ti2(O3Cl)2 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(2), one O(3), two equivalent O(4), and one Cl(1) atom to form distorted MgClO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Mg(1)ClO5 trigonal bipyramids, edges with two equivalent Ti(2)O6 octahedra, and edges with three equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), one Cl(2), and three equivalent Cl(1) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(3), one O(6), two equivalent O(5), one Cl(1), and three equivalent Cl(2) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, edges with three equivalent Ti(2)O6 octahedra, and edges with three equivalent Mg(1)ClO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 17°. In the second Ti site, Ti(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra,  a cornercorner with one Mg(1)ClO5 trigonal bipyramid, edges with three equivalent Ti(1)O6 octahedra, and edges with two equivalent Mg(1)ClO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 2°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Sm(1), one Ti(2), and two equivalent Ti(1) atoms to form distorted OSmMgTi3 trigonal bipyramids that share  a cornercorner with one O(3)SmMgTi3 square pyramid,  a cornercorner with one Cl(2)Sm4 tetrahedra, corners with two equivalent O(1)SmMgTi3 trigonal bipyramids,  a cornercorner with one O(2)Sm2MgTi trigonal pyramid, edges with two equivalent O(3)SmMgTi3 square pyramids, edges with three equivalent O(4)SmMg2Ti2 square pyramids, and edges with two equivalent O(2)Sm2MgTi trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), two equivalent Sm(1), and one Ti(1) atom to form OSm2MgTi trigonal pyramids that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with two equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, corners with two equivalent O(2)Sm2MgTi trigonal pyramids,  an edgeedge with one O(3)SmMgTi3 square pyramid, edges with two equivalent O(4)SmMg2Ti2 square pyramids, and edges with two equivalent O(1)SmMgTi3 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Sm(2), one Ti(1), and two equivalent Ti(2) atoms to form distorted OSmMgTi3 square pyramids that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with two equivalent O(3)SmMgTi3 square pyramids, corners with three equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, edges with two equivalent O(4)SmMg2Ti2 square pyramids, edges with two equivalent O(1)SmMgTi3 trigonal bipyramids, and  an edgeedge with one O(2)Sm2MgTi trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Mg(1), one Sm(1), one Ti(1), and one Ti(2) atom to form OSmMg2Ti2 square pyramids that share  a cornercorner with one O(3)SmMgTi3 square pyramid, corners with two equivalent O(4)SmMg2Ti2 square pyramids,  a cornercorner with one Cl(2)Sm4 tetrahedra,  a cornercorner with one O(2)Sm2MgTi trigonal pyramid, edges with two equivalent O(3)SmMgTi3 square pyramids, edges with three equivalent O(1)SmMgTi3 trigonal bipyramids, and edges with two equivalent O(2)Sm2MgTi trigonal pyramids. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(2) and one Ti(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Sm(2), one Ti(1), and one Ti(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(2), and three equivalent Sm(1) atoms. In the second Cl site, Cl(2) is bonded to one Sm(1) and three equivalent Sm(2) atoms to form ClSm4 tetrahedra that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with three equivalent O(3)SmMgTi3 square pyramids, corners with six equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, and corners with two equivalent O(2)Sm2MgTi trigonal pyramids. is represented by the CIF card [CIF]
data_Sm2MgTi2(ClO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.169
_cell_length_b   5.302
_cell_length_c   10.223
_cell_angle_alpha   76.517
_cell_angle_beta   78.217
_cell_angle_gamma   66.818
_symmetry_Int_Tables_number   1
_cell_volume   200.426
_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  0.195  0.806  0.805  1.0
  Sm  Sm1  1  0.781  0.225  0.214  1.0
  Mg  Mg2  1  0.921  0.543  0.616  1.0
  Ti  Ti3  1  0.644  0.168  0.546  1.0
  Ti  Ti4  1  0.355  0.849  0.441  1.0
  Cl  Cl5  1  0.886  0.324  0.904  1.0
  Cl  Cl6  1  0.114  0.677  0.095  1.0
  O  O7  1  0.137  0.149  0.578  1.0
  O  O8  1  0.698  0.882  0.722  1.0
  O  O9  1  0.857  0.847  0.439  1.0
  O  O10  1  0.411  0.543  0.636  1.0
  O  O11  1  0.339  0.060  0.262  1.0
  O  O12  1  0.580  0.452  0.388  1.0
[/CIF]
.
The crystal structure described by MgSm2Ti2(O3Cl)2 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(2), one O(3), two equivalent O(4), and one Cl(1) atom to form distorted MgClO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Mg(1)ClO5 trigonal bipyramids, edges with two equivalent Ti(2)O6 octahedra, and edges with three equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), one Cl(2), and three equivalent Cl(1) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(3), one O(6), two equivalent O(5), one Cl(1), and three equivalent Cl(2) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, edges with three equivalent Ti(2)O6 octahedra, and edges with three equivalent Mg(1)ClO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 17°. In the second Ti site, Ti(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra,  a cornercorner with one Mg(1)ClO5 trigonal bipyramid, edges with three equivalent Ti(1)O6 octahedra, and edges with two equivalent Mg(1)ClO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 2°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Sm(1), one Ti(2), and two equivalent Ti(1) atoms to form distorted OSmMgTi3 trigonal bipyramids that share  a cornercorner with one O(3)SmMgTi3 square pyramid,  a cornercorner with one Cl(2)Sm4 tetrahedra, corners with two equivalent O(1)SmMgTi3 trigonal bipyramids,  a cornercorner with one O(2)Sm2MgTi trigonal pyramid, edges with two equivalent O(3)SmMgTi3 square pyramids, edges with three equivalent O(4)SmMg2Ti2 square pyramids, and edges with two equivalent O(2)Sm2MgTi trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), two equivalent Sm(1), and one Ti(1) atom to form OSm2MgTi trigonal pyramids that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with two equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, corners with two equivalent O(2)Sm2MgTi trigonal pyramids,  an edgeedge with one O(3)SmMgTi3 square pyramid, edges with two equivalent O(4)SmMg2Ti2 square pyramids, and edges with two equivalent O(1)SmMgTi3 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Sm(2), one Ti(1), and two equivalent Ti(2) atoms to form distorted OSmMgTi3 square pyramids that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with two equivalent O(3)SmMgTi3 square pyramids, corners with three equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, edges with two equivalent O(4)SmMg2Ti2 square pyramids, edges with two equivalent O(1)SmMgTi3 trigonal bipyramids, and  an edgeedge with one O(2)Sm2MgTi trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Mg(1), one Sm(1), one Ti(1), and one Ti(2) atom to form OSmMg2Ti2 square pyramids that share  a cornercorner with one O(3)SmMgTi3 square pyramid, corners with two equivalent O(4)SmMg2Ti2 square pyramids,  a cornercorner with one Cl(2)Sm4 tetrahedra,  a cornercorner with one O(2)Sm2MgTi trigonal pyramid, edges with two equivalent O(3)SmMgTi3 square pyramids, edges with three equivalent O(1)SmMgTi3 trigonal bipyramids, and edges with two equivalent O(2)Sm2MgTi trigonal pyramids. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(2) and one Ti(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Sm(2), one Ti(1), and one Ti(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(2), and three equivalent Sm(1) atoms. In the second Cl site, Cl(2) is bonded to one Sm(1) and three equivalent Sm(2) atoms to form ClSm4 tetrahedra that share  a cornercorner with one O(4)SmMg2Ti2 square pyramid, corners with three equivalent O(3)SmMgTi3 square pyramids, corners with six equivalent Cl(2)Sm4 tetrahedra,  a cornercorner with one O(1)SmMgTi3 trigonal bipyramid, and corners with two equivalent O(2)Sm2MgTi trigonal pyramids. is represented by the CIF card [CIF]
data_Sm2MgTi2(ClO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.169
_cell_length_b   5.302
_cell_length_c   10.223
_cell_angle_alpha   76.517
_cell_angle_beta   78.217
_cell_angle_gamma   66.818
_symmetry_Int_Tables_number   1
_cell_volume   200.426
_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  0.195  0.806  0.805  1.0
  Sm  Sm1  1  0.781  0.225  0.214  1.0
  Mg  Mg2  1  0.921  0.543  0.616  1.0
  Ti  Ti3  1  0.644  0.168  0.546  1.0
  Ti  Ti4  1  0.355  0.849  0.441  1.0
  Cl  Cl5  1  0.886  0.324  0.904  1.0
  Cl  Cl6  1  0.114  0.677  0.095  1.0
  O  O7  1  0.137  0.149  0.578  1.0
  O  O8  1  0.698  0.882  0.722  1.0
  O  O9  1  0.857  0.847  0.439  1.0
  O  O10  1  0.411  0.543  0.636  1.0
  O  O11  1  0.339  0.060  0.262  1.0
  O  O12  1  0.580  0.452  0.388  1.0
[/CIF]
.