data_global
_chemical_name_mineral 'Tamarugite'
loop_
_publ_author_name
'Robinson P D'
'Fang J H'
_journal_name_full 'American Mineralogist'
_journal_volume 54 
_journal_year 1969
_journal_page_first 19
_journal_page_last 30
_publ_section_title
;
 Crystal structures and mineral chemistry of double-salt hydrates: I. Direct
 determination of the crystal structure of tamarugite
;
_chemical_formula_sum 'Na Al S2 O14 H12'
_cell_length_a 7.353
_cell_length_b 25.225
_cell_length_c 6.097
_cell_angle_alpha 90
_cell_angle_beta 95.2
_cell_angle_gamma 90
_cell_volume 1126.214
_exptl_crystal_density_diffrn      2.065
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-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
Na   0.61690   0.05250   0.19500   0.02280
Al   0.14240   0.14540   0.67850   0.01140
S1   0.64270   0.18300   0.20970   0.01520
S2   0.70760   0.02040   0.75150   0.01520
O1   0.55940   0.22140   0.04240   0.02406
O2   0.81710   0.16210   0.13920   0.02406
O3   0.51590   0.13910   0.23730   0.02913
O4   0.68110   0.21120   0.42290   0.02280
O5   0.29290   0.04000   0.26120   0.02533
O6   0.75710   0.04210   0.53800   0.02660
O7   0.52080   0.03810   0.79380   0.01900
O8   0.83910   0.03840   0.93260   0.01900
Wat1   0.12320   0.18700   0.41820   0.01900
Wat2   0.06110   0.08810   0.49870   0.02280
Wat3   0.38370   0.12600   0.63650   0.01900
Wat4   0.90200   0.16360   0.72990   0.01773
Wat5   0.23580   0.20200   0.84460   0.02406
Wat6   0.13890   0.10000   0.93070   0.03040