data_global
_chemical_name_mineral 'Cryolite'
loop_
_publ_author_name
'Naray-Szabo S'
'Sasvari K'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 99 
_journal_year 1938
_journal_page_first 27
_journal_page_last 31
_publ_section_title
;
 Die Struktur des Kryoliths Na3 Al F6
 _cod_database_code 1010932
;
_database_code_amcsd 0017654
_chemical_formula_sum 'Al Na3 F6'
_cell_length_a 5.46
_cell_length_b 5.61
_cell_length_c 7.8
_cell_angle_alpha 90
_cell_angle_beta 90.18
_cell_angle_gamma 90
_cell_volume 238.918
_exptl_crystal_density_diffrn      2.918
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al1   0.00000   0.00000   0.00000
Na1   0.00000   0.00000   0.50000
Na2   0.50000  -0.05500   0.24000
F1   0.06500   0.06000   0.22000
F2  -0.29000   0.16000   0.03000
F3   0.15000   0.28000  -0.06000