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 = 293 K
;
_database_code_amcsd 0002734
_chemical_formula_sum 'K2 Fe S2 O12 H8'
_cell_length_a 11.837
_cell_length_b 9.547
_cell_length_c 9.939
_cell_angle_alpha 90
_cell_angle_beta 94.88
_cell_angle_gamma 90
_cell_volume 1119.113
_exptl_crystal_density_diffrn      2.364
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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
_atom_site_occupancy
_atom_site_U_iso_or_equiv
K   0.16890   0.26351   0.24913   1.00000   0.02700
Fe1   0.00000   0.00000   0.00000   1.00000   0.01430
Fe2   0.00000   0.50000   0.50000   1.00000   0.01300
S1   0.20733   0.50000  -0.04466   1.00000   0.01430
S2   0.21291   0.00000  -0.48145   1.00000   0.01390
O1   0.15670   0.37400  -0.11190   1.00000   0.02720
O2A   0.15260   0.09500  -0.40140   0.50000   0.02540
O2B   0.17650   0.14810  -0.45400   0.50000   0.02900
O3   0.17160   0.00000   0.06560   1.00000   0.03650
O4   0.18800   0.50000   0.09740   1.00000   0.03350
O5   0.16450   0.50000   0.43730   1.00000   0.02180
O6   0.19290   0.02400   0.37420   0.50000   0.02670
Ow1   0.03990   0.33740  -0.35540   1.00000   0.02110
Ow2   0.00000   0.22040   0.00000   1.00000   0.03170
Ow3   0.01290   0.00000  -0.21450   1.00000   0.03210
H1   0.07200   0.27600  -0.38500   1.00000   0.03900
H2   0.07900   0.35400  -0.27900   1.00000   0.04500
H3   0.04400   0.26900  -0.03200   1.00000   0.04600
H4   0.06500   0.00000  -0.25800   1.00000   0.06100
H5  -0.04300   0.00000  -0.26800   1.00000   0.05700