data_global
_chemical_name_mineral 'Meionite'
loop_
_publ_author_name
'Antao S M'
'Hassan I'
_journal_name_full 'American Mineralogist'
_journal_volume 93 
_journal_year 2008
_journal_page_first 1470
_journal_page_last 1477
_publ_section_title
;
 Unusual Al-Si ordering in calcic scapolite, Me79.6, with increasing temperature
 T = 494
;
_database_code_amcsd 0004646
_chemical_formula_sum '(Ca3.176 Na.824) (Si7.32 Al4.68) C.834 S.146 O27.084'
_cell_length_a 12.2192
_cell_length_b 12.2192
_cell_length_c 7.5792
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1131.642
_exptl_crystal_density_diffrn      2.718
_symmetry_space_group_name_H-M 'I 4/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-y,x,z'
  '1/2-y,1/2+x,1/2+z'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'y,-x,z'
  '1/2+y,1/2-x,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-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
CaM   0.35780   0.28510   0.00000   0.79400   0.04800
NaM   0.35780   0.28510   0.00000   0.20600   0.04800
SiTl   0.16240   0.08930   0.00000   0.75000   0.02300
AlTl   0.16240   0.08930   0.00000   0.25000   0.02300
SiT2   0.15940   0.41460   0.20700   0.54000   0.01740
AlT2   0.15940   0.41460   0.20700   0.46000   0.01740
CA   0.50000   0.50000   0.00000   0.83400   0.02700
SA   0.50000   0.50000   0.00000   0.14600   0.02700
O1   0.04110   0.14740   0.00000   1.00000   0.02800
O2   0.18570   0.37880   0.00000   1.00000   0.03700
O3   0.45050   0.14970   0.21080   1.00000   0.04600
O4   0.26650   0.36990   0.67020   1.00000   0.03400
O5S   0.37030   0.57840   0.11030   0.07300   0.11800
O6C   0.59920   0.50920   0.00000   0.62500   0.11800