#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000064.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_9000064
_chemical_name 'Nepheline'
loop_
_publ_author_name
'Buerger M J'
'Klein G E'
'Donnay G'
_journal_name_full "American Mineralogist"
_journal_volume 39
_journal_year 1954
_journal_page_first 805
_journal_page_last 818
_publ_section_title
;
 Determination of the crystal structure of nepheline
;
_chemical_formula_sum 'K Na3 Si4 Al4 O16'
_cell_length_a 10.01
_cell_length_b 10.01
_cell_length_c 8.405
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 729.351
_symmetry_space_group_name_H-M 'P 63'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x-y,x,1/2+z'
  '-y,x-y,z'
  '-x,-y,1/2+z'
  '-x+y,-x,z'
  'y,-x+y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K   0.00000   0.00000   0.00000
Na   0.00800   0.43200   0.00000
Si1   0.33333   0.66667   0.82000
Al1   0.33333   0.66667   0.18000
Si2   0.09200   0.33000   0.33333
Al2   0.09200   0.33000   0.66667
O1   0.33333   0.66667   0.00000
O2   0.02000   0.33000   0.50000
O3   0.18000   0.50000   0.75000
O4   0.17000   0.53000   0.25000
O5   0.23000   0.28000   0.25000
O6   0.23000   0.28000   0.75000