data_global
_chemical_name_mineral 'Fluorapophyllite-(Na)'
loop_
_publ_author_name
'Miura Y'
'Kato T'
'Rucklidge J C'
'Matsueda H'
_journal_name_full 'American Mineralogist'
_journal_volume 66 
_journal_year 1981
_journal_page_first 410
_journal_page_last 423
_publ_section_title
;
 Natroapophyllite, a new orthorhombic sodium analog of apophyllite
 II. Crystal structure
;
_database_code_amcsd 0000830
_chemical_compound_source 'the Sampo mine, Okayama, Japan'
_chemical_formula_sum 'Si8 Ca4 Na F O28 H16'
_cell_length_a 8.875
_cell_length_b 8.881
_cell_length_c 15.79
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1244.550
_exptl_crystal_density_diffrn      2.378
_symmetry_space_group_name_H-M 'P n n m'
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'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si1   0.22890   0.08330   0.18900   0.01418
Si2   0.41610   0.27080   0.31080   0.01431
Ca1   0.11430   0.24650   0.00000   0.01520
Ca2   0.75370   0.11480   0.00000   0.01583
Na   0.00000   0.00000   0.50000   0.03597
F   0.00000   0.00000   0.00000   0.02368
O1   0.36710   0.13220   0.25130   0.01722
O2   0.08820   0.19020   0.21620   0.02064
O21   0.30990   0.41230   0.28390   0.02014
O3   0.26960   0.09870   0.09210   0.02216
O31   0.40160   0.23050   0.40790   0.02102
O4   0.22860   0.45050   0.08870   0.03103
O41   0.55020   0.22530   0.08900   0.03420
H1   0.47000   0.17000   0.05000   0.02026
H11   0.17000   0.54000   0.08000   0.01773
H2   0.16000   0.43000   0.14000   0.01013
H21   0.56000   0.31000   0.14000   0.04053