data_global
_chemical_name_mineral 'Tetra-ferri-annite'
loop_
_publ_author_name
'Comodi P'
'Zanazzi P F'
'Weiss Z'
'Rieder M'
'Drabek M'
_journal_name_full 'American Mineralogist'
_journal_volume 84 
_journal_year 1999
_journal_page_first 325
_journal_page_last 332
_publ_section_title
;
 "Cs-tetra-ferri-annite:" High-pressure and high-temperature behavior of a
 potential nuclear waste disposal phase
 T = 435 deg C, crystal 2
;
_database_code_amcsd 0002206
_chemical_formula_sum 'Cs.89 Fe3.92 Si3.04 Al.04 O12'
_cell_length_a 5.476
_cell_length_b 9.502
_cell_length_c 10.954
_cell_angle_alpha 90
_cell_angle_beta 99.54
_cell_angle_gamma 90
_cell_volume 562.086
_exptl_crystal_density_diffrn      3.638
_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
Cs   0.00000   0.50000   0.00000   0.89000   0.04950
Fe1   0.00000   0.00000   0.50000   1.00000   0.02510
Fe2   0.00000   0.33260   0.50000   1.00000   0.02490
Si   0.07930   0.16670   0.23980   0.76000   0.02290
Fe   0.07930   0.16670   0.23980   0.23000   0.02290
Al   0.07930   0.16670   0.23980   0.01000   0.02290
O1   0.06330   0.00000   0.18700   1.00000   0.05200
O2   0.31280   0.25120   0.18650   1.00000   0.04700
O3   0.13030   0.16720   0.39610   1.00000   0.02400
O4   0.13480   0.50000   0.40160   1.00000   0.03000