data_global
_chemical_name_mineral 'Steklite'
loop_
_publ_author_name
'Vegard L'
'Maurstad A'
_journal_name_full 'Skrifter utgitt av det Norske Videnskaps-Akademi i Oslo'
_journal_volume 1928 
_journal_year 1928
_journal_page_first 1
_journal_page_last 24
_publ_section_title
;
 Die Kristallstruktur der wasserfreien Alaune R'R'''(SO4)2
 _cod_database_code 1011235
;
_database_code_amcsd 0018101
_chemical_formula_sum 'K Al S2 O8'
_cell_length_a 4.706
_cell_length_b 4.706
_cell_length_c 7.96
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 152.668
_exptl_crystal_density_diffrn      2.808
_symmetry_space_group_name_H-M 'P 3 2 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'y,x,-z'
  '-y,x-y,z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K   0.00000   0.00000   0.00000
Al   0.00000   0.00000   0.50000
S   0.33333   0.66667   0.22200
O1   0.33333   0.66667   0.01600
O2   0.32800   0.34400   0.31700