data_global
_chemical_name_mineral 'Chekhovichite'
loop_
_publ_author_name
'Rossell H J'
'Leblanc M'
'Ferey G'
'Bevan D J M'
'Simpson D J'
'Taylor M R'
_journal_name_full 'Australian Journal of Chemistry'
_journal_volume 45 
_journal_year 1992
_journal_page_first 1415
_journal_page_last 1425
_publ_section_title
;
 On the crystal structure of Bi2Te4O11
 Locality: synthetic
;
_chemical_formula_sum 'Bi2 Te4 O11'
_cell_length_a 6.9909
_cell_length_b 7.9593
_cell_length_c 18.8963
_cell_angle_alpha 90
_cell_angle_beta 95.176
_cell_angle_gamma 90
_cell_volume 1047.153
_exptl_crystal_density_diffrn      7.005
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-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
Bi1   0.56400   0.11800   0.42160   0.01102
Bi2   0.56420   0.11000   0.91420   0.01140
Te1   0.27680   0.16050   0.24600   0.00798
Te2   0.91410   0.11940   0.57430   0.00785
Te3   0.24270   0.09040   0.75480   0.01203
Te4   0.89320   0.13920   0.07180   0.00849
O1   0.94100   0.17000   0.47770   0.01013
O2   0.92100   0.17200   0.97070   0.01267
O3   0.27000   0.15900   0.58450   0.01520
O4   0.27500   0.14500   0.34480   0.01900
O5   0.56200   0.02500   0.76350   0.02406
O6   0.95400   0.15300   0.75070   0.02533
O7   0.64400   0.07100   0.54130   0.01520
O8   0.34800   0.16900   0.10760   0.01900
O9   0.67100   0.02000   0.03650   0.01140
O10   0.80200   0.10400   0.19080   0.03420
O11   0.31000   0.22300   0.83490   0.02786