data_global
_chemical_name_mineral 'Sanidine'
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
;
_database_code_amcsd 0000312
_chemical_compound_source 'Laacher See, Eifel District, Germany'
_chemical_formula_sum '(Si3 Al) (K.85 Na.15) O8'
_cell_length_a 8.539
_cell_length_b 13.015
_cell_length_c 7.179
_cell_angle_alpha 90
_cell_angle_beta 115.99
_cell_angle_gamma 90
_cell_volume 717.154
_exptl_crystal_density_diffrn      2.555
_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   0.00940   0.18430   0.22390   0.71000
Al1   0.00940   0.18430   0.22390   0.29000
Si2   0.70790   0.11770   0.34440   0.79000
Al2   0.70790   0.11770   0.34440   0.21000
K   0.28390   0.00000   0.13660   0.85000
Na   0.28390   0.00000   0.13660   0.15000
OA(1)   0.00000   0.14610   0.00000   1.00000
OA(2)   0.63300   0.00000   0.28510   1.00000
OB   0.82760   0.14530   0.22560   1.00000
OC   0.03300   0.31030   0.25720   1.00000
OD   0.18130   0.12650   0.40380   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 0.00925 0.00944 0.00781 -0.00202 0.00351 -0.00085
Al1 0.00925 0.00944 0.00781 -0.00202 0.00351 -0.00085
Si2 0.00836 0.00687 0.00844 -0.00051 0.00301 -0.00043
Al2 0.00836 0.00687 0.00844 -0.00051 0.00301 -0.00043
K 0.01910 0.03089 0.02764 0.00000 0.00728 0.00000
Na 0.01910 0.03089 0.02764 0.00000 0.00728 0.00000
OA(1) 0.02567 0.01630 0.01856 0.00000 0.01129 0.00000
OA(2) 0.01970 0.01116 0.02067 0.00000 0.00401 0.00000
OB 0.02089 0.02832 0.02489 -0.00405 0.01305 0.00043
OC 0.01582 0.01459 0.01920 -0.00253 0.00552 -0.00255
OD 0.01970 0.01802 0.01603 0.00101 0.00452 0.00085