data_global
_chemical_name_mineral 'Steklite'
loop_
_publ_author_name
'Murashko M N'
'Pekov I V'
'Krivovichev S V'
'Chernyatyeava A P'
'Yapaskurt V O'
'Zadov A E'
'Zelensky M E'
_journal_name_full 'Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva'
_journal_volume 141 
_journal_year 2012
_journal_page_first 36
_journal_page_last 44
_publ_section_title
;
 Steklite, KAl(SO4)2: the find at Tolbachik volcano (Kamchatka, Russia).
 Validation as a mineral species and crystal structure
;
_database_code_amcsd 0020037
_chemical_compound_source 'Tolbachik volcano, Kamchatka, Russia'
_chemical_formula_sum 'K (Al.89 Fe.11) S2 O8'
_cell_length_a 4.7281
_cell_length_b 4.7281
_cell_length_c 7.9936
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 154.756
_exptl_crystal_density_diffrn      2.805
_symmetry_space_group_name_H-M 'P 3 1 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,y,-z'
  '-y,x-y,z'
  '-y,-x,-z'
  '-x+y,-x,z'
  'x,x-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
K   0.00000   0.00000   0.50000   1.00000   0.02250
Al   0.00000   0.00000   0.00000   0.89000   0.00820
Fe   0.00000   0.00000   0.00000   0.11000   0.00820
S   0.66667   0.33333   0.79630   1.00000   0.00850
O1   0.66667   0.33333   0.61520   1.00000   0.01780
O2   0.34870   0.27820   0.85920   1.00000   0.01380