data_global
_chemical_name_mineral 'Rhodesite'
loop_
_publ_author_name
'Hesse K F'
'Liebau F'
'Merlino S'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 199 
_journal_year 1992
_journal_page_first 25
_journal_page_last 48
_publ_section_title
;
 Crystal structure of rhodesite, HK1-xNax+2yCa2-y{lB,3,2}[Si8O19]*(6-z)H2O,
 from three localities and its relation to other silicates with dreier double layers
;
_database_code_amcsd 0011013
_chemical_compound_source 'Zeilberg, Germany'
_chemical_formula_sum 'K.249 Ca.504 Si6 O17.716 H4.932'
_cell_length_a 23.416
_cell_length_b 6.555
_cell_length_c 7.050
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1082.118
_exptl_crystal_density_diffrn      1.494
_symmetry_space_group_name_H-M 'P m a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,-z'
  '-x,-y,z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '1/2+x,-y,z'
  '1/2-x,y,-z'
  '-x,-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
K   0.25000   0.44490   0.00000   0.24900   0.03200
Ca1   0.00000   0.50000   0.00000   0.25300   0.01400
Ca2   0.00000   0.50000   0.50000   0.25100   0.01100
Si1   0.11680   0.28950   0.21960   1.00000   0.00800
Si2   0.18380   0.54100   0.50000   0.50000   0.00600
Si3   0.10230   0.93090   0.50000   0.50000   0.00700
O1   0.05900   0.40740   0.24760   1.00000   0.01600
O2   0.17170   0.40890   0.31300   1.00000   0.01600
O3   0.11670   0.06270   0.31310   1.00000   0.02400
O4   0.13510   0.25500   0.00000   0.50000   0.01000
O5   0.14580   0.74270   0.50000   0.50000   0.02100
O6   0.03780   0.85270   0.50000   0.50000   0.02900
O7   0.25000   0.60760   0.50000   0.25000   0.01400
Wat8   0.03810   0.83790   0.00000   0.54600   0.09200
Wat9   0.33080   0.77800   0.00000   0.45100   0.07500
Wat10   0.25000   0.02110   0.19010   0.23600   0.08000