data_global
_amcsd_formula_title 'SrO*2(Al2O3)'
loop_
_publ_author_name
'Boyko E R'
'Wisnyi L G'
_journal_name_full 'Acta Crystallographica'
_journal_volume 11 
_journal_year 1958
_journal_page_first 444
_journal_page_last 445
_publ_section_title
;
 The optical properties and structures of CaO*2Al2O3 and SrO*2Al2O3
;
_database_code_amcsd 0009209
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Sr Al4 O7'
_cell_length_a 13.04
_cell_length_b 9.01
_cell_length_c 5.55
_cell_angle_alpha 90
_cell_angle_beta 106.502
_cell_angle_gamma 90
_cell_volume 625.213
_exptl_crystal_density_diffrn      3.267
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Sr   0.00000   0.81000   0.25000
Al1   0.16900   0.08600   0.29500
Al2   0.12200   0.44100   0.25700
O1   0.00000   0.52600   0.25000
O2   0.11700   0.04800   0.54400
O3   0.12700   0.26000   0.17500
O4   0.18800   0.44700   0.59800