The crystal structure described by Sr2MgSmTa(CuO4)2 crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. Sm(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. Ta(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra are not tilted. Cu(1) is bonded in a rectangular see-saw-like geometry to four equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sm(1), and two equivalent Cu(1) atoms to form a mixture of corner, face, and edge-sharing OSr2Sm2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the second O site, O(2) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to four equivalent Sr(1) and one Ta(1) atom. is represented by the CIF card [CIF]
data_Sr2SmMgTa(CuO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.045
_cell_length_b   4.045
_cell_length_c   13.140
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   214.959
_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
  Sr  Sr0  1  0.500  0.500  0.746  1.0
  Sr  Sr1  1  0.500  0.500  0.254  1.0
  Sm  Sm2  1  0.500  0.500  0.500  1.0
  Mg  Mg3  1  0.500  0.500  0.000  1.0
  Ta  Ta4  1  0.000  0.000  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.611  1.0
  Cu  Cu6  1  0.000  0.000  0.389  1.0
  O  O7  1  0.500  0.000  0.618  1.0
  O  O8  1  0.000  0.500  0.618  1.0
  O  O9  1  0.500  0.000  0.382  1.0
  O  O10  1  0.000  0.500  0.382  1.0
  O  O11  1  0.000  0.500  0.000  1.0
  O  O12  1  0.500  0.000  0.000  1.0
  O  O13  1  0.000  0.000  0.150  1.0
  O  O14  1  0.000  0.000  0.850  1.0
[/CIF]
.
The crystal structure described by Sr2MgSmTa(CuO4)2 crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. Sm(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. Ta(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra are not tilted. Cu(1) is bonded in a rectangular see-saw-like geometry to four equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sm(1), and two equivalent Cu(1) atoms to form a mixture of corner, face, and edge-sharing OSr2Sm2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the second O site, O(2) is bonded in a square co-planar geometry to two equivalent Mg(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to four equivalent Sr(1) and one Ta(1) atom. is represented by the CIF card [CIF]
data_Sr2SmMgTa(CuO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.045
_cell_length_b   4.045
_cell_length_c   13.140
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   214.959
_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
  Sr  Sr0  1  0.500  0.500  0.746  1.0
  Sr  Sr1  1  0.500  0.500  0.254  1.0
  Sm  Sm2  1  0.500  0.500  0.500  1.0
  Mg  Mg3  1  0.500  0.500  0.000  1.0
  Ta  Ta4  1  0.000  0.000  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.611  1.0
  Cu  Cu6  1  0.000  0.000  0.389  1.0
  O  O7  1  0.500  0.000  0.618  1.0
  O  O8  1  0.000  0.500  0.618  1.0
  O  O9  1  0.500  0.000  0.382  1.0
  O  O10  1  0.000  0.500  0.382  1.0
  O  O11  1  0.000  0.500  0.000  1.0
  O  O12  1  0.500  0.000  0.000  1.0
  O  O13  1  0.000  0.000  0.150  1.0
  O  O14  1  0.000  0.000  0.850  1.0
[/CIF]
.