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#$Date: 2014-07-11 17:35:18 +0300 (Fri, 11 Jul 2014) $
#$Revision: 120071 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/00/60/1006009.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_1006009
_chemical_name_systematic
;
Strontium chromium gallium oxide (1/7.9/4.1/19)
;
_chemical_formula_structural       'Sr Cr7.87 Ga4.13 O19'
_chemical_formula_sum              'Cr7.87 Ga4.13 O19 Sr'
_publ_section_title
;
Magnetic frustration and lattice dimensionality in Sr Cr~8~ Ga~4~ O~19~
;
loop_
_publ_author_name
  'Obradors, X'
  'Labarta, A'
  'Isalgue, A'
  'Tejada, J'
  'Rodriguez, J'
  'Pernet, M'
_journal_name_full                 'Solid State Communications'
_journal_coden_ASTM                SSCOA4
_journal_volume                    65
_journal_year                      1988
_journal_page_first                189
_journal_page_last                 192
_cell_length_a                     5.7993(1)
_cell_length_b                     5.7993(1)
_cell_length_c                     22.6584(3)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       660.0
_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
  Sr2+   2.000
  Ga3+   3.000
  Cr3+   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+   2 b 0. 0. 0.25 1.  0 d
  Ga1   Ga3+   2 a 0. 0. 0. 0.04  0 d
  Cr1   Cr3+   2 a 0. 0. 0. 0.96  0 d
  Ga2   Ga3+   4 e 0. 0. 0.2561(3) 0.5  0 d
  Ga3   Ga3+   4 f 0.3333 0.6667 0.0282(1) 1.  0 d
  Ga4   Ga3+   4 f 0.3333 0.6667 0.1925(2) 0.135(15)  0 d
  Cr2   Cr3+   4 f 0.3333 0.6667 0.1925(2) 0.865(15)  0 d
  Ga5   Ga3+  12 k 0.1681(4) 0.3362(4) -0.1084(1) 0.1367  0 d
  Cr3   Cr3+  12 k 0.1681(4) 0.3362(4) -0.1084(1) 0.8633  0 d
  O1    O2-    4 e 0. 0. 0.1515(1) 1.  0 d
  O2    O2-    4 f 0.3333 0.6667 -0.0545(1) 1.  0 d
  O3    O2-    6 h 0.1821(2) 0.3642(2) 0.25 1.  0 d
  O4    O2-   12 k 0.1567(2) 0.3134(4) 0.0528(1) 1.  0 d
  O5    O2-   12 k 0.5053(2) 0.0106(4) 0.1510(1) 1.  0 d
_refine_ls_R_factor_all            0.032
_cod_database_code 1006009
_journal_paper_doi 10.1016/0038-1098(88)90885-X