data_global
_chemical_name_mineral 'Alunite'
loop_
_publ_author_name
'Pabst A'
_journal_name_full 'American Mineralogist'
_journal_volume 32 
_journal_year 1947
_journal_page_first 16
_journal_page_last 30
_publ_section_title
;
 Some computations on svanbergite, woodhouseite and alunite
;
_database_code_amcsd 0000037
_chemical_formula_sum 'K Al3 S2 O14 H6'
_cell_length_a 7.058
_cell_length_b 7.058
_cell_length_c 7.058
_cell_angle_alpha 59.08
_cell_angle_beta 59.08
_cell_angle_gamma 59.08
_cell_volume 243.402
_exptl_crystal_density_diffrn      2.826
_symmetry_space_group_name_H-M 'R -3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-z,-y'
  '-z,-x,-y'
  'y,x,z'
  'y,z,x'
  '-z,-y,-x'
  '-x,-y,-z'
  'x,z,y'
  'z,x,y'
  '-y,-x,-z'
  '-y,-z,-x'
  'z,y,x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K   0.00000   0.00000   0.00000
Al   0.50000   0.00000   0.00000
S   0.30500   0.30500   0.30500
O1   0.39300   0.39300   0.39300
O2   0.51200   0.15700   0.15700
O-H3  -0.17400   0.27600   0.27600