data_global
_chemical_name_mineral 'Orthoclase'
loop_
_publ_author_name
'Chao S'
'Hargreaves A'
'Taylor W'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 25 
_journal_year 1940
_journal_page_first 498
_journal_page_last 512
_publ_section_title
;
 The structure of orthoclase.
 _cod_database_code 1011205
;
_database_code_amcsd 0018075
_chemical_formula_sum 'K Si3 Al O8'
_cell_length_a 8.6
_cell_length_b 13.02
_cell_length_c 7.22
_cell_angle_alpha 90
_cell_angle_beta 116.05
_cell_angle_gamma 90
_cell_volume 726.310
_exptl_crystal_density_diffrn      2.545
_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
K1   0.29170   0.00000   0.13890   1.00000
Si1   0.70970   0.11670   0.34700   1.00000
Al2   0.00970   0.18750   0.22500   0.50000
Si2   0.00970   0.18750   0.22500   0.50000
O1   0.00000   0.15280   0.00000   1.00000
O2   0.66670   0.00000   0.30280   1.00000
O3   0.81940   0.15280   0.22780   1.00000
O4   0.04170   0.31670   0.26110   1.00000
O5   0.17220   0.12780   0.41670   1.00000