data_9009985
_chemical_name 'Chapmanite'
loop_
_publ_author_name
'Ballirano P'
'Maras A'
'Marchetti F'
'Merlino S'
'Perchiazzi N'
_journal_name_full "Powder Diffraction"
_journal_volume 13
_journal_year 1998
_journal_page_first 44
_journal_page_last 49
_publ_section_title
;
 Rietveld refinement of chapmanite SbFe2Si2O8OH,
 a TO dioctahderal kaolinite-like mineral
 Locality: Tafone mine, Tucsany, Italy
;
_chemical_formula_sum 'Sb Fe2 Si2 O9 H'
_cell_length_a 5.225
_cell_length_b 8.997
_cell_length_c 7.780
_cell_angle_alpha 90
_cell_angle_beta 101.71
_cell_angle_gamma 90
_cell_volume 358.121
_symmetry_space_group_name_H-M 'C 1 m 1'
loop_
_symmetry_equiv_pos_as_xyz
  '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_Uiso_or_equiv
Sb   0.42300   0.50000   0.74200   0.03800
Fe   0.50500   0.16810   0.00530   0.03800
Si   0.29800   0.16700   0.36100   0.03800
O1   0.29700   0.33370  -0.12700   0.03800
O2   0.29600   0.00000  -0.13000   0.03800
O3   0.22300   0.17050   0.14690   0.03800
O-H   0.69200   0.00000   0.14500   0.03800
O4   0.07300   0.25100   0.44100   0.03800
O5   0.32600   0.00000   0.43900   0.03800