#------------------------------------------------------------------------------
#$Date: 2008-01-26 13:05:32 +0000 (Sat, 26 Jan 2008) $
#$Revision: 19 $
#$URL: svn://www.crystallography.net/cod/cif/2/2002518.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2002518
_chemical_name_systematic
;
Barium strontium copper aluminium oxide (0.5/0.5/1/10/17)
;
_chemical_formula_structural       '(Ba0.5 Sr0.5) Cu Al10 O17'
_chemical_formula_sum              'Al10 Ba.5 Cu O17 Sr.5'
_publ_section_title
;
Eine $-beta-Tonerde mit Cu2+ in tetraedischer Koordination: (Ba, Sr) Cu
Al10 O17
;
loop_
_publ_author_name
  'Gutau, W'
  'Mueller-Buschbaum, Hk'
_journal_name_full
;
Zeitschrift fuer Anorganische und Allgemeine Chemie
;
_journal_volume                    582
_journal_year                      1990
_journal_page_first                21
_journal_page_last                 24
_cell_length_a                     5.6043(45)
_cell_length_b                     5.6043(45)
_cell_length_c                     22.678190000(24900002)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       616.9
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'P 63/m m c'
_symmetry_Int_Tables_number        194
_symmetry_cell_setting             hexagonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-y,x-y,z'
  'y-x,-x,z'
  '-y,-x,z'
  'y-x,y,z'
  'x,x-y,z'
  '-x,-y,-z'
  'y,y-x,-z'
  'x-y,x,-z'
  'y,x,-z'
  'x-y,-y,-z'
  '-x,y-x,-z'
  '-x,-y,1/2+z'
  'y,y-x,1/2+z'
  'x-y,x,1/2+z'
  'y,x,1/2+z'
  'x-y,-y,1/2+z'
  '-x,y-x,1/2+z'
  'x,y,1/2-z'
  '-y,x-y,1/2-z'
  'y-x,-x,1/2-z'
  '-y,-x,1/2-z'
  'y-x,y,1/2-z'
  'x,x-y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Al3+   3.000
  Cu2+   2.000
  Ba2+   2.000
  Sr2+   2.000
  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
  Al1   Al3+   2 a 0. 0. 0. 1.  0 d
  Al2   Al3+   4 f 0.3333 0.6667 0.0240(1) 0.5  0 d
  Al3   Al3+   4 f 0.3333 0.6667 0.1747(1) 1.  0 d
  Al4   Al3+  12 k 0.1663(2) 0.3325(4) 0.894 1.  0 d
  Cu1   Cu2+   4 f 0.3333 0.6667 0.0240(1) 0.5  0 d
  Ba1   Ba2+   2 d 0.3333 0.6667 0.75 0.5  0 d
  Sr1   Sr2+   2 d 0.3333 0.6667 0.75 0.5  0 d
  O1    O2-    2 c 0.3333 0.6667 0.25 1.  0 d
  O2    O2-    4 e 0. 0. 0.1436(3) 1.  0 d
  O3    O2-    4 f 0.3333 0.6667 0.9409(3) 1.  0 d
  O4    O2-   12 k 0.1536(5) 0.3072(10) 0.0517(1) 1.  0 d
  O5    O2-   12 k 0.5045(5) 0.009(1) 0.1482(2) 1.  0 d
_refine_ls_R_factor_all            0.052