data_global
_chemical_name_mineral 'Kanemite'
loop_
_publ_author_name
'Garvie L A J'
'Devouard B'
'Groy T L'
'Camara F'
'Buseck P R'
_journal_name_full 'American Mineralogist'
_journal_volume 84 
_journal_year 1999
_journal_page_first 1170
_journal_page_last 1175
_publ_section_title
;
 Crystal structure of kanemite, NaHSi2O5.3H2O, from the Aris phonolite, Namibia
;
_database_code_amcsd 0002274
_chemical_formula_sum 'Si2 Na O8 H8'
_cell_length_a 4.946
_cell_length_b 20.502
_cell_length_c 7.275
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 737.706
_exptl_crystal_density_diffrn      1.938
_symmetry_space_group_name_H-M 'P b c n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-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
Si   0.04970   0.29250   0.03910 ?
Na   0.50000   0.51150  -0.25000 ?
O1   0.00000   0.31280   0.25000 ?
O2   0.00420   0.35710  -0.07900 ?
O3  -0.14380   0.23260  -0.01810 ?
O4   0.48760   0.57540   0.02670 ?
O5   0.00000   0.54110  -0.25000 ?
H2A   0.01930   0.37950  -0.19890   0.03600
H4A   0.64500   0.40200  -0.05100   0.06500
H4B   0.36400   0.40600  -0.04300   0.08500
H5A   0.00670   0.50710  -0.33470   0.17000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si 0.00100 0.00180 0.00110 0.00000 0.00010 0.00020
Na 0.00340 0.00290 0.00250 0.00000 0.00000 0.00000
O1 0.00330 0.00420 0.00140 0.00000 0.00040 0.00000
O2 0.00310 0.00230 0.00140 0.00030 0.00000 0.00030
O3 0.00110 0.00250 0.00430 -0.00080 -0.00010 -0.00010
O4 0.00370 0.00230 0.00390 -0.00020 0.00010 -0.00010
O5 0.00290 0.00600 0.01110 0.00000 0.00030 0.00000