#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000768.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_9000768
_chemical_name 'Feldspar'
loop_
_publ_author_name
'Viswanathan K'
'Brandt K'
_journal_name_full "American Mineralogist"
_journal_volume 65
_journal_year 1980
_journal_page_first 472
_journal_page_last 476
_publ_section_title
;
 The crystal structure of ternary (Ba,K,Na)-feldspar and its significance
;
_chemical_formula_sum '(Si2.82 Al1.18) (K.59 Na.22 Ba.19) O8'
_cell_length_a 8.516
_cell_length_b 13.023
_cell_length_c 7.206
_cell_angle_alpha 90
_cell_angle_beta 115.9
_cell_angle_gamma 90
_cell_volume 718.902
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Si1   0.00870   0.18310   0.22400   0.70500
Al1   0.00870   0.18310   0.22400   0.29500
Si2   0.70460   0.11750   0.34450   0.70500
Al2   0.70460   0.11750   0.34450   0.29500
K   0.28260   0.00000   0.13450   0.59000
Na   0.28260   0.00000   0.13450   0.22000
Ba   0.28260   0.00000   0.13450   0.19000
Oa1   0.00000   0.14290   0.00000   1.00000
Oa2   0.62730   0.00000   0.28640   1.00000
Ob   0.82600   0.14220   0.22700   1.00000
Oc   0.03080   0.31010   0.25670   1.00000
Od   0.18410   0.12540   0.40450   1.00000