data_global
_chemical_name_mineral 'Gmelinite-K'
loop_
_publ_author_name
'Sacerdoti M'
'Passaglia E'
'Carnevali R'
_journal_name_full 'Zeolites'
_journal_volume 15 
_journal_year 1995
_journal_page_first 276
_journal_page_last 281
_publ_section_title
;
 Structural refinements of Na-, K-, and Ca-exchanged gmelinites
 Note: sample 2K, natural sample is cation exchanged with K
;
_database_code_amcsd 0015872
_chemical_compound_source 'Queensland, Australia'
_chemical_formula_sum 'K2.86 (Si4.16 Al1.84) O16.72 H9.44'
_cell_length_a 13.687
_cell_length_b 13.687
_cell_length_c 10.256
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1663.892
_exptl_crystal_density_diffrn      2.217
_symmetry_space_group_name_H-M 'P 63/m m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  'y,x,-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x,-x+y,-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
  'x-y,-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
K1   0.33330   0.66670   0.06600   1.00000   0.02810
K2   0.10130   0.20300   0.07700   0.31000   0.12900
Si   0.43400   0.09990   0.09880   0.69330   0.01000
Al   0.43400   0.09990   0.09880   0.30670   0.01000
O1   0.42790   0.21390   0.06530   1.00000   0.02700
O2   0.87070   0.43540   0.07260   1.00000   0.02100
O3   0.39490   0.05640   0.25000   1.00000   0.02400
O4   0.34530   0.00000   0.00000   1.00000   0.02100
Wat1   0.16200   0.55000   0.25000   0.50000   0.07700
Wat2   0.17870   0.35700   0.25000   0.34000   0.07100
Wat4   0.16900   0.08470   0.25000   0.40000   0.08200
Wat5   0.13710   0.27400   0.17500   0.20000   0.06400