data_global
_chemical_name_mineral 'Fibroferrite'
loop_
_publ_author_name
'Scordari F'
_journal_name_full 'Tschermaks Mineralogische und Petrographische Mitteilungen'
_journal_volume 28 
_journal_year 1981
_journal_page_first 17
_journal_page_last 29
_publ_section_title
;
 Fibroferrite: A mineral with a {Fe(OH)(H2O)2SO4} spiral chain and its
 relationship to Fe(OH)SO4, butlerite and parabutlerite
;
_database_code_amcsd 0015680
_chemical_compound_source 'Saint Felix de Pailleres, France'
_chemical_formula_sum 'Fe (O10 S) H11'
_cell_length_a 24.177
_cell_length_b 24.177
_cell_length_c 7.656
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 3875.586
_exptl_crystal_density_diffrn      1.997
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Fe   0.39790   0.05600   0.28380   0.01317
O-H5   0.34300   0.97170   0.38030   0.01532
S   0.27190   0.06820   0.33320   0.00671
O1   0.24670   0.02220   0.18320   0.00899
O2   0.23810   0.03390   0.49050   0.03470
O3   0.26380   0.12260   0.30120   0.02875
O4   0.34100   0.09040   0.35590   0.01203
Wat6   0.46170   0.14830   0.20360   0.02166
Wat7   0.46420   0.03120   0.21440   0.01912
Wat8   0.56120   0.22750   0.39880   0.02558
Wat9   0.23480   0.55590   0.10330   0.02862
Wat10   0.09780   0.23240   0.29340   0.03496