data_global
_chemical_name_mineral 'Witzkeite'
loop_
_publ_author_name
'Nestola F'
'Camara F'
'Chukanov N V'
'Atencio D'
'Coutinho J M V'
'Contreira R R'
'Farber G'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 1783
_journal_page_last 1787
_publ_section_title
;
 Witzkeite: A new rare nitrate-sulphate mineral
 from a guano deposit at Punta de Lobos, Chile
;
_database_code_amcsd 0019473
_chemical_compound_source 'Punta de Lobos, Chile'
_chemical_formula_sum 'Na4 K4 Ca Fe.05 S4 N2 O24 H4'
_cell_length_a 24.902
_cell_length_b 5.3323
_cell_length_c 17.246
_cell_angle_alpha 90
_cell_angle_beta 94.281
_cell_angle_gamma 90
_cell_volume 2283.620
_exptl_crystal_density_diffrn      2.430
_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
_atom_site_U_iso_or_equiv
Na1   0.41977   0.24195   0.07588   1.00000   0.02140
Na2   0.50009  -0.26669   0.08618   1.00000   0.02410
K1   0.15202   0.25031   0.10623   1.00000   0.02470
K2   0.32417   0.24292   0.23240   1.00000   0.02750
Ca   0.50000   0.17350   0.25000   1.00000   0.01630
Fe   0.50000   0.33300   0.25000   0.05000   0.01520
S1   0.56605  -0.75113   0.07266   1.00000   0.01530
S2   0.41680  -0.27020   0.22437   1.00000   0.01570
N1   0.75732   0.24620   0.12315   1.00000   0.03230
O1   0.43161   0.47240   0.20028   1.00000   0.02580
O2   0.35931  -0.25870   0.23440   1.00000   0.02260
O3   0.43758  -0.01330  -0.02829   1.00000   0.02390
O4   0.43613   0.53770  -0.01849   1.00000   0.02270
O5   0.55222  -0.20440   0.20292   1.00000   0.02380
O6   0.38488   0.25670   0.37627   1.00000   0.02500
O7   0.51776   0.26720   0.11856   1.00000   0.02100
O8   0.43192  -0.08880   0.16526   1.00000   0.02590
O9   0.25780   0.04360   0.34995   1.00000   0.04130
O10   0.25789   0.44910   0.34928   1.00000   0.04170
O11   0.78891   0.24720   0.07049   1.00000   0.05040
Ow   0.32731   0.24590   0.05085   1.00000   0.03830
H1   0.31020   0.37700   0.05900   1.00000   0.03700
H2   0.30800   0.13400   0.06000   1.00000   0.07000