data_global
_chemical_name_mineral 'Fluor-schorl'
loop_
_publ_author_name
'Ertl A'
'Kolitsch U'
'Dyar M D'
'Hughes J M'
'Rossman G R'
'Pieczka A'
'Henry D J'
'Pezzotta F'
'Prowatke S'
'Lengauer C L'
'Korner W'
'Brandstatter F'
'Francis C A'
'Prem M'
'Tillmanns E'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 1402
_journal_page_last 1416
_publ_section_title
;
 Limitations of Fe2+ and Mn2+ site occupancy in tourmaline:
 Evidence from Fe2+ - and Mn2+ -rich tourmaline
 Note: sample bls2h2, heated a second time in air at 750 C for 72 h
;
_database_code_amcsd 0019252
_chemical_compound_source 'Blocherleitengraben, Lower Austria'
_chemical_formula_sum '(Na.971 Ca.029) (Fe3.522 Al5.478) Si6 B3 O31'
_cell_length_a 15.918
_cell_length_b 15.918
_cell_length_c 7.2600
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1593.105
_exptl_crystal_density_diffrn      3.330
_symmetry_space_group_name_H-M 'R 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+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
NaX   0.00000   0.00000   0.21990   0.97100   0.02090
CaX   0.00000   0.00000   0.21990   0.02900   0.02090
FeY   0.12583   0.06292   0.63456   0.67600   0.00990
AlY   0.12583   0.06292   0.63456   0.32400   0.00990
AlZ   0.29741   0.25699   0.60442   0.75100   0.00767
FeZ   0.29741   0.25699   0.60442   0.24900   0.00767
SiT   0.19105   0.19018   0.00121   1.00000   0.00590
B   0.11011   0.22023   0.45320   1.00000   0.00790
O1   0.00000   0.00000   0.76270   1.00000   0.01000
O2   0.06072   0.12143   0.48567   1.00000   0.01000
O3   0.25949   0.12974   0.52253   1.00000   0.01090
O4   0.09423   0.18846   0.07786   1.00000   0.01020
O5   0.18185   0.09092   0.08526   1.00000   0.01060
O6   0.19142   0.18593   0.77868   1.00000   0.00888
O7   0.28587   0.28509   0.07625   1.00000   0.00898
O8   0.20918   0.26999   0.43951   1.00000   0.00993
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
NaX 0.02240 0.02240 0.01780 0.01120 0.00000 0.00000
CaX 0.02240 0.02240 0.01780 0.01120 0.00000 0.00000
FeY 0.01256 0.00763 0.01116 0.00628 -0.00515 -0.00257
AlY 0.01256 0.00763 0.01116 0.00628 -0.00515 -0.00257
AlZ 0.00541 0.00953 0.00728 0.00314 0.00017 0.00223
FeZ 0.00541 0.00953 0.00728 0.00314 0.00017 0.00223
SiT 0.00562 0.00553 0.00662 0.00284 -0.00037 -0.00057
B 0.00750 0.00670 0.00940 0.00330 0.00020 0.00030
O1 0.00960 0.00960 0.01060 0.00480 0.00000 0.00000
O2 0.01020 0.00640 0.01210 0.00320 0.00010 0.00020
O3 0.01430 0.01030 0.00940 0.00720 -0.00010 -0.00010
O4 0.00770 0.01460 0.01060 0.00730 -0.00054 -0.00110
O5 0.01560 0.00810 0.01070 0.00780 0.00130 0.00070
O6 0.01010 0.00950 0.00650 0.00450 -0.00070 -0.00060
O7 0.00750 0.00720 0.00990 0.00190 -0.00110 -0.00130
O8 0.00600 0.00900 0.01420 0.00330 0.00040 0.00230