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 = 4.7 GPa
;
_database_code_amcsd 0006200
_chemical_compound_source 'Torino, Italy'
_chemical_formula_sum '(Na.63 K.27 Ca.1) (Al1.1 Si2.9) O8'
_cell_length_a 7.959
_cell_length_b 12.767
_cell_length_c 6.999
_cell_angle_alpha 92.51
_cell_angle_beta 116.50
_cell_angle_gamma 90.69
_cell_volume 635.458
_exptl_crystal_density_diffrn      2.803
_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   0.26160   0.00500   0.13560   0.63000   0.05300
K   0.26160   0.00500   0.13560   0.27000   0.05300
Ca   0.26160   0.00500   0.13560   0.10000   0.05300
Al10   0.00180   0.16740   0.21650   0.27500   0.02100
Si10   0.00180   0.16740   0.21650   0.72500   0.02100
Al1m  -0.00330   0.81470   0.22470   0.27500   0.02100
Si1m  -0.00330   0.81470   0.22470   0.72500   0.02100
Al20   0.68500   0.10850   0.32460   0.27500   0.02200
Si20   0.68500   0.10850   0.32460   0.72500   0.02200
Al2m   0.67670   0.87710   0.35680   0.27500   0.02100
Si2m   0.67670   0.87710   0.35680   0.72500   0.02100
OA1   0.00250   0.13510   0.98300   1.00000   0.03600
OA2   0.57950   0.99170   0.28260   1.00000   0.02600
OB0   0.80870   0.10580   0.19600   1.00000   0.03700
OBm   0.80720   0.85030   0.23290   1.00000   0.03500
OC0  -0.00120   0.29250   0.27190   1.00000   0.02600
OCm   0.00930   0.68730   0.22350   1.00000   0.02400
OD0   0.19010   0.11810   0.39250   1.00000   0.04300
ODm   0.17980   0.87060   0.41010   1.00000   0.03000