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 = 101
;
_database_code_amcsd 0004642
_chemical_formula_sum '(Ca3.176 Na.824) (Si7.32 Al4.68) C.834 S.146 O27.084'
_cell_length_a 12.1736
_cell_length_b 12.1736
_cell_length_c 7.5757
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1122.693
_exptl_crystal_density_diffrn      2.740
_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   0.35790   0.28440   0.00000   0.79400   0.03300
NaM   0.35790   0.28440   0.00000   0.20600   0.03300
SiTl   0.16210   0.09110   0.00000   0.75000   0.01700
AlTl   0.16210   0.09110   0.00000   0.25000   0.01700
SiT2   0.15930   0.41340   0.20710   0.54000   0.01320
AlT2   0.15930   0.41340   0.20710   0.46000   0.01320
CA   0.50000   0.50000   0.00000   0.83400   0.01600
SA   0.50000   0.50000   0.00000   0.14600   0.01600
O1   0.04060   0.14880   0.00000   1.00000   0.01600
O2   0.18560   0.37550   0.00000   1.00000   0.02400
O3   0.45080   0.15040   0.20830   1.00000   0.03100
O4   0.26610   0.36740   0.67130   1.00000   0.02700
O5S   0.37910   0.57380   0.10650   0.07300   0.09500
O6C   0.60030   0.51130   0.00000   0.62500   0.09500