data_global
_chemical_name_mineral 'Seidite-(Ce)'
loop_
_publ_author_name
'Ferraris G'
'Belluso E'
'Gula A'
'Soboleva S V'
'Khomyakov A P'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 41 
_journal_year 2003
_journal_page_first 1183
_journal_page_last 1192
_publ_section_title
;
 The crystal structure of seidite-(Ce), Na4(Ce,Sr)2{Ti(OH)2(Si8O18)}(O,OH,F)4.5H2O,
 a modular microporous titanosilicate of the rhodesite group
;
_database_code_amcsd 0005884
_chemical_formula_sum 'Si8 Ti.86 Nb.06 Mn.05 Fe.02 Ce.42 La.3 Nd.1 Pr.04 Sm.02 Sr.54 Ca.2 Th.12 Na3.2 K.28 Ba.12 O28.02 F.84 H12.8'
_cell_length_a 24.61
_cell_length_b 7.23
_cell_length_c 14.53
_cell_angle_alpha 90
_cell_angle_beta 94.6
_cell_angle_gamma 90
_cell_volume 2577.000
_exptl_crystal_density_diffrn      2.733
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_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'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-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
Si1   0.13600   0.00800   0.08300   1.00000
Si2   0.12600   0.06800   0.87000   1.00000
Si3   0.18500   0.25400   0.26000   1.00000
Si4   0.18300   0.69900   0.21200   1.00000
Ti   0.00000   0.00000   0.00000   0.86000
Nb   0.00000   0.00000   0.00000   0.06000
Mn   0.00000   0.00000   0.00000   0.05000
Fe   0.00000   0.00000   0.00000   0.02000
Ce   0.19500   0.75000   0.96000   0.21000
La   0.19500   0.75000   0.96000   0.15000
Nd   0.19500   0.75000   0.96000   0.05000
Pr   0.19500   0.75000   0.96000   0.02000
Sm   0.19500   0.75000   0.96000   0.01000
Sr   0.19500   0.75000   0.96000   0.27000
Ca   0.19500   0.75000   0.96000   0.10000
Th   0.19500   0.75000   0.96000   0.06000
Na1   0.06100   0.75900   0.21500   0.80000
K1   0.06100   0.75900   0.21500   0.07000
Ba1   0.06100   0.75900   0.21500   0.03000
Na2   0.15900   0.37000   0.04500   0.80000
K2   0.15900   0.37000   0.04500   0.07000
Ba2   0.15900   0.37000   0.04500   0.03000
O1   0.07100   0.96600   0.07200   1.00000
O2   0.15000   0.04800   0.97700   1.00000
O3   0.15700   0.20400   0.80000   1.00000
O4   0.06800   0.10200   0.91500   1.00000
O5   0.16100   0.80700   0.11600   1.00000
O6   0.25100   0.22500   0.27300   1.00000
O7   0.15900   0.13400   0.17100   1.00000
O8   0.18000   0.47500   0.23100   1.00000
O9   0.14900   0.88500   0.81900   1.00000
O-H10   0.98700   0.26400   0.03600   1.00000
Wat11   0.00000   0.47300   0.25000   1.00000
Wat12   0.00000   0.09100   0.25000   1.00000
Wat13   0.06200   0.51200   0.04300   1.00000
O14   0.26500   0.94400   0.93200   1.00000
Wat15   0.25000   0.25000   0.00000   1.00000
O16   0.12700   0.51400   0.90900   0.11000
O-H16   0.12700   0.51400   0.90900   0.40000
F16   0.12700   0.51400   0.90900   0.42000