data_9000122
_chemical_name 'Dickite'
loop_
_publ_author_name
'Bailey S W'
_journal_name_full "American Mineralogist"
_journal_volume 48
_journal_year 1963
_journal_page_first 1196
_journal_page_last 1209
_publ_section_title
;
 Polymorphism of the kaolin minerals
;
_chemical_formula_sum 'Si2 Al2 O9 H4'
_cell_length_a 5.150
_cell_length_b 8.940
_cell_length_c 14.736
_cell_angle_alpha 90
_cell_angle_beta 103.58
_cell_angle_gamma 90
_cell_volume 659.492
_symmetry_space_group_name_H-M 'C 1 c 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1   0.02880   0.34990   0.04050
Si2   0.54000   0.17680   0.04020
Al1   0.31660   0.49660   0.23200
Al2   0.81160   0.33300   0.23060
O1   0.03850   0.51270  -0.00610
O2   0.73550   0.27760  -0.00580
O3   0.24120   0.23950   0.00580
O4   0.07200   0.36240   0.15230
O5   0.64160   0.16870   0.15260
O-H1   0.57560   0.47420   0.15740
O-H2   0.05090   0.47670   0.29480
O-H3   0.55090   0.35510   0.29810
O-H4   0.96350   0.16680   0.29630