data_global
_chemical_name_mineral 'Orthoclase'
loop_
_publ_author_name
'Kimata M'
'Saito S'
'Shimizu M'
'Iida I'
'Matsui T'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Abhandlungen'
_journal_volume 171 
_journal_year 1996
_journal_page_first 199
_journal_page_last 213
_publ_section_title
;
 Low-temperature structures of orthoclase and sanidine
 Note: T = 296 K
;
_database_code_amcsd 0020549
_chemical_compound_source 'Itrongay, Madagascar'
_chemical_formula_sum 'K (Si3 Al) O8'
_cell_length_a 8.600
_cell_length_b 13.005
_cell_length_c 7.193
_cell_angle_alpha 90
_cell_angle_beta 116.03
_cell_angle_gamma 90
_cell_volume 722.883
_exptl_crystal_density_diffrn      2.557
_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   0.28630   0.00000   0.13870   1.00000
SiT1   0.00960   0.18560   0.22400   0.64800
AlT1   0.00960   0.18560   0.22400   0.35200
SiT2   0.71040   0.11800   0.34430   0.85200
AlT2   0.71040   0.11800   0.34430   0.14800
Oa1   0.00000   0.14620   0.00000   1.00000
Oa2   0.64000   0.00000   0.28460   1.00000
Ob   0.82840   0.14770   0.22760   1.00000
Oc   0.03640   0.31130   0.25890   1.00000
Od   0.17950   0.12630   0.40600   1.00000