data_2002411
_chemical_name_systematic          'Tristrontium dilanthanum disamarium oxide'
_chemical_formula_structural       'Sr3 La2 Sm2 O9'
_chemical_formula_sum              'La2 O9 Sm2 Sr3'
_publ_section_title
;
Metastabile Oxometallate der Lanthanoidmetalle: Zur Kenntnis von Sr3
Pr4 O9 und Sr3 La2 Sm2 O9. Mit einem Beitrag ueber Sr Pr2 O4
;
loop_
_publ_author_name
  'Mueller-Buschbaum, Hk'
  'Boehlke, A'
_journal_name_full
;
Zeitschrift fuer Anorganische und Allgemeine Chemie
;
_journal_volume                    553
_journal_year                      1987
_journal_page_first                212
_journal_page_last                 218
_cell_length_a                     11.518(11)
_cell_length_b                     7.263(6)
_cell_length_c                     13.290(7)
_cell_angle_alpha                  90
_cell_angle_beta                   115.61(5)
_cell_angle_gamma                  90
_cell_volume                       1002.6
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'C 1 c 1'
_symmetry_Int_Tables_number        9
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/2+x,1/2-y,1/2+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Sr2+   2.000
  La3+   3.000
  Sm3+   3.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Sr1   Sr2+   4 a 0.75 0.0850(13) 0. 0.4286  0 d
  Sr2   Sr2+   4 a 0.5750(11) 0.8040(9) 0.2211(11) 0.4286  0 d
  Sr3   Sr2+   4 a 0.8303(13) 0.1382(15) 0.2886(11) 0.4286  0 d
  Sr4   Sr2+   4 a 0.8368(12) 0.3383(13) 0.6692(11) 0.4286  0 d
  Sr5   Sr2+   4 a 0.6238(11) 0.6165(15) 0.8791(9) 0.4286  0 d
  Sr6   Sr2+   4 a 0.9361(10) 0.4456(11) 0.9492(8) 0.4286  0 d
  Sr7   Sr2+   4 a 0.0594(12) 0.8764(15) 0.0841(10) 0.4286  0 d
  La1   La3+   4 a 0.75 0.0850(13) 0. 0.2857  0 d
  La2   La3+   4 a 0.5750(11) 0.8040(9) 0.2211(11) 0.2857  0 d
  La3   La3+   4 a 0.8303(13) 0.1382(15) 0.2886(11) 0.2857  0 d
  La4   La3+   4 a 0.8368(12) 0.3383(13) 0.6692(11) 0.2857  0 d
  La5   La3+   4 a 0.6238(11) 0.6165(15) 0.8791(9) 0.2857  0 d
  La6   La3+   4 a 0.9361(10) 0.4456(11) 0.9492(8) 0.2857  0 d
  La7   La3+   4 a 0.0594(12) 0.8764(15) 0.0841(10) 0.2857  0 d
  Sm1   Sm3+   4 a 0.75 0.0850(13) 0. 0.2857  0 d
  Sm2   Sm3+   4 a 0.5750(11) 0.8040(9) 0.2211(11) 0.2857  0 d
  Sm3   Sm3+   4 a 0.8303(13) 0.1382(15) 0.2886(11) 0.2857  0 d
  Sm4   Sm3+   4 a 0.8368(12) 0.3383(13) 0.6692(11) 0.2857  0 d
  Sm5   Sm3+   4 a 0.6238(11) 0.6165(15) 0.8791(9) 0.2857  0 d
  Sm6   Sm3+   4 a 0.9361(10) 0.4456(11) 0.9492(8) 0.2857  0 d
  Sm7   Sm3+   4 a 0.0594(12) 0.8764(15) 0.0841(10) 0.2857  0 d
  O1    O2-    4 a 0.106(8) 0.186(13) 0.056 1.  0 d
  O2    O2-    4 a 0.338(9) 0.107(13) 0.576(8) 1.  0 d
  O3    O2-    4 a 0.317(8) 0.335(12) 0.351(7) 1.  0 d
  O4    O2-    4 a 0.042(9) 0.203(13) 0.404(8) 1.  0 d
  O5    O2-    4 a 0.140(9) 0.589(13) 0.130(8) 1.  0 d
  O6    O2-    4 a 0.242(9) 0.948(12) 0.274(8) 1.  0 d
  O7    O2-    4 a 0.064(8) 0.572(12) 0.341(7) 1.  0 d
  O8    O2-    4 a 0.435(9) 0.469(12) 0.195(9) 1.  0 d
  O9    O2-    4 a 0.824(8) 0.236(12) 0.476(8) 1.  0 d
_refine_ls_R_factor_all            0.12