data_global
_chemical_name_mineral 'Sanidine'
loop_
_publ_author_name
'Brown G E'
'Hamilton W C'
'Prewitt C T'
'Sueno S'
_journal_name_full 'The Feldspars: Proceedings of a NATO Advanced Study Institute'
_journal_volume 
_journal_year 1974
_journal_page_first 68
_journal_page_last 80
_publ_section_title
;
 Neutron diffraction study of Al/Si ordering in sanidine: a comparison with
 X-ray diffraction data
;
_database_code_amcsd 0020556
_chemical_compound_source 'Laacher See, Eifel District, Germany'
_chemical_formula_sum '(K.85 Na.15) (Si3 Al) 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
_atom_site_U_iso_or_equiv
KM   0.28370   0.00000   0.13690   0.85000   0.02660
NaM   0.28370   0.00000   0.13690   0.15000   0.02660
SiT1s   0.00970   0.18430   0.22380   0.68500   0.00887
AlT1a   0.00970   0.18430   0.22380   0.31500   0.00887
SiT2s   0.70750   0.11780   0.34420   0.81500   0.00798
AlT2a   0.70750   0.11780   0.34420   0.18500   0.00798
Oa1   0.00000   0.14590   0.00000   1.00000   0.01938
Oa2   0.63340   0.00000   0.28480   1.00000   0.01722
Ob   0.82770   0.14520   0.22640   1.00000   0.02419
Oc   0.03350   0.31000   0.25750   1.00000   0.01697
Od   0.18130   0.12620   0.40440   1.00000   0.01849
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
KM 0.01850 0.04291 0.03291 0.00000 0.00753 0.00000
NaM 0.01850 0.04291 0.03291 0.00000 0.00753 0.00000
SiT1s 0.00955 0.01201 0.00696 -0.00202 0.00351 -0.00043
AlT1a 0.00955 0.01201 0.00696 -0.00202 0.00351 -0.00043
SiT2s 0.00985 0.00858 0.00865 -0.00051 0.00301 0.00000
AlT2a 0.00985 0.00858 0.00865 -0.00051 0.00301 0.00000
Oa1 0.02447 0.01974 0.01519 0.00000 0.01004 0.00000
Oa2 0.01910 0.01201 0.02046 0.00000 0.00326 0.00000
Ob 0.01880 0.03089 0.02616 -0.00455 0.01405 0.00043
Oc 0.01522 0.01545 0.02067 -0.00202 0.00502 -0.00213
Od 0.01880 0.02060 0.01076 0.00253 0.00201 0.00128