data_global
_chemical_name_mineral 'Anorthoclase'
loop_
_publ_author_name
'Nestola F'
'Curetti N'
'Benna P'
'Ivaldi G'
'Angel R'
'Bruno E'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 46 
_journal_year 2008
_journal_page_first 1443
_journal_page_last 1454
_publ_section_title
;
 Compressibility and high-pressure behavior of Ab63Or27An10 anorthoclase
 Note: P = 0.0001 GPa
;
_database_code_amcsd 0006199
_chemical_compound_source 'Torino, Italy'
_chemical_formula_sum '(Na.63 K.27 Ca.1) (Al1.1 Si2.9) O8'
_cell_length_a 8.278
_cell_length_b 12.949
_cell_length_c 7.145
_cell_angle_alpha 91.79
_cell_angle_beta 116.16
_cell_angle_gamma 90.19
_cell_volume 686.973
_exptl_crystal_density_diffrn      2.593
_symmetry_space_group_name_H-M 'C -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
_atom_site_U_iso_or_equiv
Na   0.27510   0.00270   0.13690   0.63000   0.07900
K   0.27510   0.00270   0.13690   0.27000   0.07900
Ca   0.27510   0.00270   0.13690   0.10000   0.07900
Al10   0.00610   0.17370   0.21650   0.27500   0.02300
Si10   0.00610   0.17370   0.21650   0.72500   0.02300
Al1m   0.00430   0.81780   0.22130   0.27500   0.02800
Si1m   0.00430   0.81780   0.22130   0.72500   0.02800
Al20   0.69690   0.11390   0.33920   0.27500   0.02400
Si20   0.69690   0.11390   0.33920   0.72500   0.02400
Al2m   0.69380   0.88140   0.34920   0.27500   0.02200
Si2m   0.69380   0.88140   0.34920   0.72500   0.02200
OA1   0.00020   0.13620   0.99340   1.00000   0.04600
OA2   0.60400   0.99670   0.28170   1.00000   0.03400
OB0   0.82620   0.12460   0.22180   1.00000   0.03200
OBm   0.82500   0.85900   0.23780   1.00000   0.03700
OC0   0.02120   0.29980   0.26250   1.00000   0.03600
OCm   0.02620   0.69150   0.24410   1.00000   0.04400
OD0   0.18890   0.11840   0.39170   1.00000   0.03400
ODm   0.18610   0.87270   0.40650   1.00000   0.04900