#------------------------------------------------------------------------------
#$Date: 2010-01-30 15:59:17 +0200 (Sat, 30 Jan 2010) $
#$Revision: 966 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9012090.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9012090
loop_
_publ_author_name
'Ercit, T. S.'
'Hawthorne, F. C.'
'Cerny, P.'
_publ_section_title
;
 Locality: synthetic
 The crystal structure of synthetic natrotantite
;
_journal_name_full               'Bulletin de Mineralogie'
_journal_page_first              541
_journal_page_last               549
_journal_volume                  108
_journal_year                    1985
_chemical_formula_sum            'Na2 O11 Ta4'
_chemical_name_mineral           Natrotantite
_space_group_IT_number           167
_symmetry_space_group_name_Hall  '-R 3 2"c'
_symmetry_space_group_name_H-M   'R -3 c :H'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   6.2092
_cell_length_b                   6.2092
_cell_length_c                   36.6190
_cell_volume                     1222.668
_[local]_cod_data_source_file    11893.cif
_[local]_cod_data_source_block   global
_[local]_cod_cif_authors_sg_H-M  'R -3 c'
_[local]_cod_chemical_formula_sum_orig 'Na2 Ta4 O11'
loop_
_symmetry_equiv_pos_as_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,1/2+z
2/3+x,1/3+x-y,5/6+z
1/3+x,2/3+x-y,1/6+z
y,x,1/2-z
2/3+y,1/3+x,5/6-z
1/3+y,2/3+x,1/6-z
-x+y,y,1/2+z
2/3-x+y,1/3+y,5/6+z
1/3-x+y,2/3+y,1/6+z
-x,-x+y,1/2-z
2/3-x,1/3-x+y,5/6-z
1/3-x,2/3-x+y,1/6-z
-y,-x,1/2+z
2/3-y,1/3-x,5/6+z
1/3-y,2/3-x,1/6+z
x-y,-y,1/2-z
2/3+x-y,1/3-y,5/6-z
1/3+x-y,2/3-y,1/6-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
-x,-y,-z
2/3-x,1/3-y,1/3-z
1/3-x,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_U_iso_or_equiv
Na 0.00000 0.00000 0.33230 0.03926
Ta1 0.36410 0.00000 0.25000 0.03977
Ta2 0.00000 0.00000 0.00000 0.04255
O1 0.05200 0.41400 0.19750 0.02786
O2 0.75000 0.00000 0.25000 0.04559
O3 0.00000 0.00000 0.40740 0.02280
_cod_database_code 9012090