data_global
_chemical_name_mineral 'Mereiterite'
loop_
_publ_author_name
'Hertweck B'
'Giester G'
'Libowitzky E'
_journal_name_full 'American Mineralogist'
_journal_volume 86 
_journal_year 2001
_journal_page_first 1282
_journal_page_last 1292
_publ_section_title
;
 The crystal structures of the low-temperature phases of leonite-type compounds,
 K2Me(SO4)2.4H2O (Me=Mg,Mn,Fe)
 Sample: K2Fe(SO4)2.4H2O, T = 185 K
;
_database_code_amcsd 0002733
_chemical_formula_sum 'K2 Fe S2 O12 H8'
_cell_length_a 11.834
_cell_length_b 9.502
_cell_length_c 9.913
_cell_angle_alpha 90
_cell_angle_beta 94.87
_cell_angle_gamma 90
_cell_volume 1110.660
_exptl_crystal_density_diffrn      2.382
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
K1   0.16871   0.26936   0.23932   0.01460
K2   0.16905  -0.25715   0.25871   0.01390
Fe1   0.00000   0.00000   0.00000   0.00840
Fe2   0.00000   0.50000   0.50000   0.00780
S1   0.20725   0.50503  -0.04538   0.00860
S2   0.21392  -0.00657  -0.48176   0.00790
O1A  -0.15110   0.37250   0.11520   0.01580
O1B   0.16110   0.37380  -0.10930   0.01730
O2A   0.14990   0.08990  -0.40000   0.01500
O2B   0.18190  -0.15290  -0.45660   0.01680
O3   0.17160   0.01270   0.06710   0.02170
O4   0.18850   0.50750   0.09770   0.01910
O5   0.16370   0.51110   0.43660   0.01260
O6   0.19340   0.02440   0.37370   0.01630
Ow1A  -0.03500   0.33420   0.35720   0.01300
Ow1B   0.04510   0.33770  -0.35520   0.01340
Ow2  -0.00600   0.22030  -0.01410   0.01950
Ow3   0.01390  -0.01210  -0.21410   0.01910
H1A  -0.07000   0.27800   0.39100   0.02600
H2A  -0.07300   0.35200   0.27700   0.03500
H1B   0.07400   0.26900  -0.38300   0.02100
H2B   0.08300   0.35600  -0.27800   0.03600
H3A  -0.04700   0.27000   0.02100   0.03100
H3B   0.04300   0.26700  -0.03900   0.03400
H4   0.06700   0.00700  -0.26300   0.03500
H5  -0.04000  -0.01500  -0.26800   0.03200