data_global
_chemical_name_mineral 'Orthoclase'
loop_
_publ_author_name
'Phillips M W'
'Ribbe P H'
_journal_name_full 'American Mineralogist'
_journal_volume 58 
_journal_year 1973
_journal_page_first 263
_journal_page_last 270
_publ_section_title
;
 The structures of monoclinic potassium-rich feldspars
 Note: variety adularia
;
_database_code_amcsd 0000313
_chemical_compound_source 'St. Gotthard, Switzerland'
_chemical_formula_sum '(Si2.98 Al1.02) (K.88 Na.12) O8'
_cell_length_a 8.545
_cell_length_b 12.967
_cell_length_c 7.201
_cell_angle_alpha 90
_cell_angle_beta 116.00
_cell_angle_gamma 90
_cell_volume 717.141
_exptl_crystal_density_diffrn      2.560
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_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   0.00930   0.18420   0.22430   0.60000
Al1   0.00930   0.18420   0.22430   0.40000
Si2   0.70780   0.11760   0.34450   0.89000
Al2   0.70780   0.11760   0.34450   0.11000
K   0.28340   0.00000   0.13720   0.88000
Na   0.28340   0.00000   0.13720   0.12000
OA(1)   0.00000   0.14470   0.00000   1.00000
OA(2)   0.63390   0.00000   0.28480   1.00000
OB   0.82620   0.14490   0.22800   1.00000
OC   0.03390   0.31170   0.25850   1.00000
OD   0.18210   0.12570   0.40700   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si1 0.01225 0.01107 0.01061 -0.00151 0.00554 -0.00128
Al1 0.01225 0.01107 0.01061 -0.00151 0.00554 -0.00128
Si2 0.00986 0.00767 0.01040 0.00000 0.00453 0.00085
Al2 0.00986 0.00767 0.01040 0.00000 0.00453 0.00085
K 0.01942 0.03067 0.02716 0.00000 0.00755 0.00000
Na 0.01942 0.03067 0.02716 0.00000 0.00755 0.00000
OA(1) 0.02420 0.01789 0.02440 0.00000 0.01234 0.00000
OA(2) 0.01942 0.01193 0.02037 0.00000 0.00428 0.00000
OB 0.02301 0.02811 0.02653 -0.00252 0.01586 0.00085
OC 0.01703 0.01533 0.02016 -0.00303 0.00655 -0.00255
OD 0.02062 0.01704 0.01507 0.00050 0.00478 0.00170