data_global
_chemical_name_mineral 'Sanidine'
loop_
_publ_author_name
'Keefer K D'
'Brown G E'
_journal_name_full 'American Mineralogist'
_journal_volume 63 
_journal_year 1978
_journal_page_first 1264
_journal_page_last 1273
_publ_section_title
;
 Crystal structure and composition of sanidine and high albite in cryptoperthitic
 intergrowth
 Note this sample of feldspar is from the
 Rabb Canyon pegmatite, Grant County, New Mexico, USA
;
_database_code_amcsd 0000695
_chemical_formula_sum '(K.65 Na.35) (Si3 Al) O8'
_cell_length_a 8.558
_cell_length_b 12.997
_cell_length_c 7.179
_cell_angle_alpha 90
_cell_angle_beta 116.07
_cell_angle_gamma 90
_cell_volume 717.266
_exptl_crystal_density_diffrn      2.525
_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
K   0.28440   0.00000   0.13830   0.65000
Na   0.28440   0.00000   0.13830   0.35000
Si1   0.00910   0.18340   0.22360   0.75000
Al1   0.00910   0.18340   0.22360   0.25000
Si2   0.70690   0.11770   0.34310   0.75000
Al2   0.70690   0.11770   0.34310   0.25000
Oa1   0.00000   0.14430   0.00000   1.00000
Oa2   0.63080   0.00000   0.28320   1.00000
Ob   0.82700   0.14480   0.22550   1.00000
Oc   0.03270   0.30920   0.25680   1.00000
Od   0.18140   0.12560   0.40490   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
K 0.01527 0.03851 0.02486 0.00000 0.00578 0.00000
Na 0.01527 0.03851 0.02486 0.00000 0.00578 0.00000
Si1 0.01467 0.01626 0.00737 -0.00202 0.00552 -0.00085
Al1 0.01467 0.01626 0.00737 -0.00202 0.00552 -0.00085
Si2 0.01377 0.01198 0.00948 -0.00051 0.00502 0.00000
Al2 0.01377 0.01198 0.00948 -0.00051 0.00502 0.00000
Oa1 0.03114 0.02653 0.01601 0.00000 0.01256 0.00000
Oa2 0.02605 0.01626 0.02381 0.00000 0.00527 0.00000
Ob 0.02335 0.03765 0.02528 -0.00456 0.01457 0.00212
Oc 0.02126 0.02139 0.02065 -0.00253 0.00753 -0.00255
Od 0.02395 0.02396 0.01327 0.00101 0.00326 0.00085