The structure described by Sm2Ag2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Sm site, Sm(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form SmO12 cuboctahedra that share corners with four equivalent Sm(2)O12 cuboctahedra, faces with four equivalent Sm(2)O12 cuboctahedra, and faces with eight equivalent Ag(1)O5 square pyramids. Ag(1) is bonded to one O(2) and four equivalent O(1) atoms to form AgO5 square pyramids that share corners with five equivalent Ag(1)O5 square pyramids and faces with four equivalent Sm(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Ag(1) atoms to form a mixture of distorted edge, corner, and face-sharing OSm4Ag2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the second O site, O(2) is bonded to four equivalent Sm(2) and two equivalent Ag(1) atoms to form a mixture of distorted edge, corner, and face-sharing OSm4Ag2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. is represented by the CIF card [CIF]
data_Sm2Ag2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.153
_cell_length_b   4.153
_cell_length_c   7.211
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   124.348
_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  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.000  0.000  0.500  1.0
  Ag  Ag2  1  0.500  0.500  0.196  1.0
  Ag  Ag3  1  0.500  0.500  0.804  1.0
  O  O4  1  0.500  0.000  0.215  1.0
  O  O5  1  0.500  0.000  0.785  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.000  0.500  0.215  1.0
  O  O8  1  0.000  0.500  0.785  1.0
[/CIF]
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The structure described by Sm2Ag2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Sm site, Sm(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form SmO12 cuboctahedra that share corners with four equivalent Sm(2)O12 cuboctahedra, faces with four equivalent Sm(2)O12 cuboctahedra, and faces with eight equivalent Ag(1)O5 square pyramids. Ag(1) is bonded to one O(2) and four equivalent O(1) atoms to form AgO5 square pyramids that share corners with five equivalent Ag(1)O5 square pyramids and faces with four equivalent Sm(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Ag(1) atoms to form a mixture of distorted edge, corner, and face-sharing OSm4Ag2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the second O site, O(2) is bonded to four equivalent Sm(2) and two equivalent Ag(1) atoms to form a mixture of distorted edge, corner, and face-sharing OSm4Ag2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. is represented by the CIF card [CIF]
data_Sm2Ag2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.153
_cell_length_b   4.153
_cell_length_c   7.211
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   124.348
_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  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.000  0.000  0.500  1.0
  Ag  Ag2  1  0.500  0.500  0.196  1.0
  Ag  Ag3  1  0.500  0.500  0.804  1.0
  O  O4  1  0.500  0.000  0.215  1.0
  O  O5  1  0.500  0.000  0.785  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.000  0.500  0.215  1.0
  O  O8  1  0.000  0.500  0.785  1.0
[/CIF]
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