#------------------------------------------------------------------------------
#$Date: 2008-01-13 22:15:36 +0000 (Sun, 13 Jan 2008) $
#$Revision: 14 $
#$URL: svn://www.crystallography.net/cod/cif/1/1000401.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_1000401
_chemical_name_systematic          'Niobic acid'
_chemical_formula_structural       'H Nb O3'
_chemical_formula_sum              'H Nb O3'
_publ_section_title
;
La reaction d'echange topotactique Li Nb O3 -> H Nb O3 en milieu acide
;
loop_
_publ_author_name
  'Fourquet, J-L'
  'Renou, M-F'
  'De=Pape, R'
_journal_name_full                 'Revue de Chimie Minerale'
_journal_coden_ASTM                RVCMA8
_journal_volume                    21
_journal_year                      1984
_journal_page_first                383
_journal_page_last                 390
_cell_length_a                     7.645(2)
_cell_length_b                     7.645(2)
_cell_length_c                     7.645(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       446.8
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'I m -3'
_symmetry_Int_Tables_number        204
_symmetry_cell_setting             cubic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x,-y,-z'
  '-x,y,-z'
  '-x,-y,z'
  'y,z,x'
  '-y,-z,x'
  'y,-z,-x'
  '-y,z,-x'
  'z,x,y'
  '-z,x,-y'
  '-z,-x,y'
  'z,-x,-y'
  '-x,-y,-z'
  '-x,y,z'
  'x,-y,z'
  'x,y,-z'
  '-y,-z,-x'
  'y,z,-x'
  '-y,z,x'
  'y,-z,x'
  '-z,-x,-y'
  'z,-x,y'
  'z,x,-y'
  '-z,x,y'
  '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'
  '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,1/2-x'
  '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,1/2-x,1/2-y'
  '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'
  '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,1/2+x'
  '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,1/2+x,1/2+y'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Nb5+   5.000
  O2-   -2.000
  H1+    1.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Nb1   Nb5+   8 c 0.25 0.25 0.25 1.  0 d
  O1    O2-   24 g 0. 0.189(2) 0.289(3) 1.  0 d
  H1    H1+   24 g 0. 0.060(21) 0.304(27) 0.17  0 d
  H2    H1+   24 g 0. 0.196 0.44 0.17  0 d