data_global
_chemical_name_mineral 'Zaccagnaite'
loop_
_publ_author_name
'Lozano R P'
'Rossi C'
'La Iglesia A'
'Matesanz E'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 513
_journal_page_last 523
_publ_section_title
;
 Zaccagnaite-3R, a new Zn-Al hydrotalcite polytype
 from El Soplao cave (Cantabria, Spain)
 Note: polytype zaccagnaite-3R
;
_database_code_amcsd 0018810
_chemical_compound_source 'El Soplao cave, Cantabria, Spain'
_chemical_formula_sum '(Zn.6 Al.4) O3.056 H2.912 C.2'
_cell_length_a 3.06616
_cell_length_b 3.06616
_cell_length_c 22.6164
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 184.138
_exptl_crystal_density_diffrn      2.821
_symmetry_space_group_name_H-M 'R -3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  'y,x,-z'
  '2/3+y,1/3+x,1/3-z'
  '1/3+y,2/3+x,2/3-z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-x,-x+y,-z'
  '2/3-x,1/3-x+y,1/3-z'
  '1/3-x,2/3-x+y,2/3-z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  'x-y,-y,-z'
  '2/3+x-y,1/3-y,1/3-z'
  '1/3+x-y,2/3-y,2/3-z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-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
Zn   0.00000   0.00000   0.00000   0.60000   0.01798
Al   0.00000   0.00000   0.00000   0.40000   0.01798
O1   0.00000   0.00000   0.37720   1.00000   0.02128
H   0.00000   0.00000   0.42700   1.00000   0.02128
C   0.33333   0.66667   0.50200   0.10000   0.03166
O2   0.11400  -0.11400   0.49900   0.10000   0.03166
Wat   0.11400  -0.11400   0.49900   0.07600   0.03166