data_global
_chemical_name_mineral 'Fluor-dravite'
loop_
_publ_author_name
'Clark C M'
'Hawthorne F C'
'Ottolini L'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 49 
_journal_year 2011
_journal_page_first 57
_journal_page_last 62
_publ_section_title
;
 Fluor-dravite, NaMg3Al6Si6O18(BO3)3(OH)3F, a new mineral species of the tourmaline
 group from the Crabtree Emerald mine, Mitchell County, North Carolina:
 Description and crystal structure
;
_database_code_amcsd 0018741
_chemical_compound_source 'the Crabtree Emerald mine, Mitchell County, North Carolina, USA'
_chemical_formula_sum 'Na.88 Ca.04 Mg1.83 Fe.87 Al6.03 Mn.09 Ti.03 Li.12 Si6 B3 F.61 O30.39 H3.39'
_cell_length_a 15.955
_cell_length_b 15.955
_cell_length_c 7.153
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1576.930
_exptl_crystal_density_diffrn      3.118
_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   0.84080   0.88000   0.02090
CaX   0.00000   0.00000   0.84080   0.04000   0.02090
MgY   0.06312   0.93688   0.44473   0.43000   0.00880
FeY   0.06312   0.93688   0.44473   0.29000   0.00880
AlY   0.06312   0.93688   0.44473   0.19000   0.00880
MnY   0.06312   0.93688   0.44473   0.03000   0.00880
TiY   0.06312   0.93688   0.44473   0.01000   0.00880
LiY   0.06312   0.93688   0.44473   0.04000   0.00880
AlZ   0.26174   0.29827   0.45757   0.91000   0.00710
MgZ   0.26174   0.29827   0.45757   0.09000   0.00710
SiT   0.19009   0.19191   0.07041   1.00000   0.00670
B   0.88998   0.11002   0.61615   1.00000   0.00820
F1   0.00000   0.00000   0.29119   0.61000   0.01970
O-H1   0.00000   0.00000   0.29119   0.39000   0.01970
O-H2   0.93841   0.06159   0.59029   1.00000   0.01220
O3   0.13491   0.86509   0.55913   1.00000   0.01140
O4   0.90702   0.09298   0.00075   1.00000   0.01090
O5   0.09271   0.90729  -0.02049   1.00000   0.01080
O6   0.18803   0.19746   0.29369   1.00000   0.00940
O7   0.28527   0.28493  -0.01074   1.00000   0.00920
O8   0.27133   0.21031   0.62784   1.00000   0.01000