data_global
_chemical_name_mineral 'Orthoclase'
loop_
_publ_author_name
'Dal Negro A'
'De Pieri R'
'Quareni S'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 34 
_journal_year 1978
_journal_page_first 2699
_journal_page_last 2707
_publ_section_title
;
 The crystal structures of nine K feldspars from the Adamello
 Massif (Northern Italy)
 Note: Sample CA1A
;
_database_code_amcsd 0020552
_chemical_compound_source 'Adamello Massif, Northern Italy'
_chemical_formula_sum '(K.88 Na.1 Ca.01 Ba.01) (Al1.005 Si2.995) O8'
_cell_length_a 8.563
_cell_length_b 12.990
_cell_length_c 7.210
_cell_angle_alpha 90
_cell_angle_beta 115.93
_cell_angle_gamma 90
_cell_volume 721.255
_exptl_crystal_density_diffrn      2.557
_symmetry_space_group_name_H-M 'C 1 -1 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'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
K1   0.28400   0.99930   0.13750   0.88000
Na1   0.28400   0.99930   0.13750   0.10000
Ca1   0.28400   0.99930   0.13750   0.01000
Ba1   0.28400   0.99930   0.13750   0.01000
Al1   0.00960   0.18460   0.22350   0.47000
Si1   0.00960   0.18460   0.22350   0.53000
Al2   0.00950   0.81600   0.22520   0.36500
Si2   0.00950   0.81600   0.22520   0.63500
Al3   0.70870   0.11800   0.34410   0.08500
Si3   0.70870   0.11800   0.34410   0.91500
Al4   0.70820   0.88260   0.34510   0.08500
Si4   0.70820   0.88260   0.34510   0.91500
O1   0.99990   0.14520   0.99810   1.00000
O2   0.63550   0.00060   0.28550   1.00000
O3   0.82610   0.14570   0.22710   1.00000
O4   0.82680   0.85440   0.22900   1.00000
O5   0.03530   0.31230   0.25820   1.00000
O6   0.03530   0.68930   0.26010   1.00000
O7   0.18260   0.12550   0.40650   1.00000
O8   0.18090   0.87420   0.40740   1.00000