data_global
_chemical_name_mineral 'Loweite'
loop_
_publ_author_name
'Fang J H'
'Robinson P D'
_journal_name_full 'American Mineralogist'
_journal_volume 55 
_journal_year 1970
_journal_page_first 378
_journal_page_last 386
_publ_section_title
;
 Crystal structures and mineral chemistry of double-salt hydrates: II. The
 crystal structure of loeweite
;
_database_code_amcsd 0000200
_chemical_formula_sum 'Na12 Mg7 S13 O67 H30'
_cell_length_a 11.769
_cell_length_b 11.769
_cell_length_c 11.769
_cell_angle_alpha 106.5
_cell_angle_beta 106.5
_cell_angle_gamma 106.5
_cell_volume 1375.674
_exptl_crystal_density_diffrn      2.372
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-z,-x,-y'
  'y,z,x'
  '-x,-y,-z'
  'z,x,y'
  '-y,-z,-x'
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
Na1   0.91030   0.50640   0.35690   1.00000   0.01950
Na2   0.31210   0.45520   0.19280   1.00000   0.02267
Mg1   0.68900   0.20680   0.12140   1.00000   0.00697
Mg2   0.50000   0.50000   0.50000   1.00000   0.00621
S1   0.83280   0.45370   0.05350   1.00000   0.00621
S2   0.56470   0.41120   0.23350   1.00000   0.00621
S3   0.11950   0.11950   0.11950   0.50000   0.01317
O1   0.62100   0.02550   0.11520   1.00000   0.01621
O2   0.78610   0.38170   0.12690   1.00000   0.01912
O3   0.85110   0.06570   0.42200   1.00000   0.02039
O4   0.52550   0.02690   0.27210   1.00000   0.02875
O5   0.69420   0.51510   0.31160   1.00000   0.01368
O6   0.48740   0.40950   0.31350   1.00000   0.01140
O7   0.49770   0.43190   0.11890   1.00000   0.01216
O8   0.57340   0.28410   0.19420   1.00000   0.01127
O9   0.00000   0.00000   0.00000   1.00000   0.04749
Wat1   0.81200   0.27640   0.31610   1.00000   0.01545
Wat2   0.83500   0.16340   0.07010   1.00000   0.03255
Wat3   0.16200   0.23670   0.07620   0.50000   0.08815
O   0.16200   0.23670   0.07620   0.50000   0.08815