#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000943.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_9000943
_chemical_name 'Microcline'
loop_
_publ_author_name
'Griffen D T'
'Johnson B T'
_journal_name_full "American Mineralogist"
_journal_volume 69
_journal_year 1984
_journal_page_first 1072
_journal_page_last 1077
_publ_section_title
;
 Strain in triclinic alkali feldspars: a crystal structure study
 intermediate
;
_chemical_formula_sum '(Al Si3) (K.89 Na.11) O8'
_cell_length_a 8.552
_cell_length_b 12.975
_cell_length_c 7.205
_cell_angle_alpha 90.09
_cell_angle_beta 115.92
_cell_angle_gamma 89.51
_cell_volume 719.031
_symmetry_space_group_name_H-M 'C -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'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Al(1o)   0.00960   0.18500   0.22290   0.54000
Si(1o)   0.00960   0.18500   0.22290   0.46000
Si(1m)   0.00930   0.81650   0.22600   0.68000
Al(1m)   0.00930   0.81650   0.22600   0.32000
Si(2o)   0.70860   0.11830   0.34340   0.93000
Al(2o)   0.70860   0.11830   0.34340   0.07000
Si(2m)   0.70740   0.88290   0.34590   0.93000
Al(2m)   0.70740   0.88290   0.34590   0.07000
K   0.28380   0.99850   0.13660   0.89000
Na   0.28380   0.99850   0.13660   0.11000
O(A1)   0.99990   0.14420   0.99590   1.00000
O(A2)   0.63520   0.00120   0.28510   1.00000
O(Bo)   0.82550   0.14530   0.22630   1.00000
O(Bm)   0.82730   0.85520   0.23010   1.00000
O(Co)   0.03440   0.31290   0.25790   1.00000
O(Cm)   0.03530   0.69020   0.26160   1.00000
O(Do)   0.18420   0.12510   0.40640   1.00000
O(Dm)   0.18090   0.87410   0.40770   1.00000