data_global
_chemical_name_mineral 'Chabazite-Mg'
loop_
_publ_author_name
'Montagna G'
'Bigi S'
'Konya P'
'Szakall S'
'Vezzalini G'
_journal_name_full 'American Mineralogist'
_journal_volume 95 
_journal_year 2010
_journal_page_first 939
_journal_page_last 945
_publ_section_title
;
 Chabazite-Mg: A new natural zeolite of the chabazite series
;
_database_code_amcsd 0005050
_chemical_compound_source 'basalts of Praga Hill, Veszprem County, West Hungary'
_chemical_formula_sum 'Mg.66 K.52 Ca.348 (Si8.88 Al3.12) O33.66 H19.32'
_cell_length_a 9.3433
_cell_length_b 9.3433
_cell_length_c 9.3433
_cell_angle_alpha 94.894
_cell_angle_beta 94.894
_cell_angle_gamma 94.894
_cell_volume 806.178
_exptl_crystal_density_diffrn      1.940
_symmetry_space_group_name_H-M 'R -3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-z,-y'
  '-z,-x,-y'
  'y,x,z'
  'y,z,x'
  '-z,-y,-x'
  '-x,-y,-z'
  'x,z,y'
  'z,x,y'
  '-y,-x,-z'
  '-y,-z,-x'
  'z,y,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
MgC3a   0.42500   0.35000   0.42500   0.11000   0.08500
KC2   0.23800   0.23800   0.23800   0.26000   0.04700
CaC4   0.58430   0.58430   0.22100   0.05800   0.04100
SiT   0.10679   0.33406   0.87926   0.74000   0.01480
AlT   0.10679   0.33406   0.87926   0.26000   0.01480
O1   0.25830  -0.25830   0.00000   1.00000   0.04410
O2   0.15440  -0.15440   0.50000   1.00000   0.03210
O3   0.25600   0.25600   0.89980   1.00000   0.04050
O4   0.03130   0.03130   0.33120   1.00000   0.03460
Wat1   0.00000   0.50000   0.50000   0.48000   0.13000
Wat2   0.25800   0.25800   0.52400   0.24000   0.16000
Wat3   0.15100   0.41900   0.51100   0.29000   0.19000
Wat4   0.37500  -0.37500   0.50000   0.34000   0.20000
Wat6a   0.28900   0.28900   0.23200   0.21000   0.07200