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 P2A
;
_database_code_amcsd 0020551
_chemical_compound_source 'Adamello Massif, Northern Italy'
_chemical_formula_sum '(K.931 Na.055 Ca.009 Ba.005) (Al.97 Si3.03) O8'
_cell_length_a 8.583
_cell_length_b 12.988
_cell_length_c 7.202
_cell_angle_alpha 90
_cell_angle_beta 116.05
_cell_angle_gamma 90
_cell_volume 721.290
_exptl_crystal_density_diffrn      2.560
_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   0.28510   0.99960   0.13800   0.93100
Na1   0.28510   0.99960   0.13800   0.05500
Ca1   0.28510   0.99960   0.13800   0.00900
Ba1   0.28510   0.99960   0.13800   0.00500
Al1   0.00950   0.18520   0.22360   0.41500
Si1   0.00950   0.18520   0.22360   0.58500
Al2   0.00960   0.81520   0.22470   0.33500
Si2   0.00960   0.81520   0.22470   0.66500
Al3   0.70960   0.11810   0.34420   0.11000
Si3   0.70960   0.11810   0.34420   0.89000
Al4   0.70930   0.88230   0.34470   0.11000
Si4   0.70930   0.88230   0.34470   0.89000
O1   0.99960   0.14580   0.99830   1.00000
O2   0.63820   0.00030   0.28540   1.00000
O3   0.82670   0.14690   0.22700   1.00000
O4   0.82760   0.85330   0.22760   1.00000
O5   0.03570   0.31190   0.25790   1.00000
O6   0.03540   0.68880   0.25970   1.00000
O7   0.18100   0.12600   0.40620   1.00000
O8   0.18010   0.87380   0.40660   1.00000