data_global
_chemical_name_mineral 'Microcline'
loop_
_publ_author_name
'Griffen D T'
'Johnson B T'
_journal_name_full 'American Mineralogist'
_journal_volume 69 
_journal_year 1984
_journal_page_first 1072
_journal_page_last 1077
_publ_section_title
;
 Strain in triclinic alkali feldspars: a crystal structure study
 intermediate
;
_database_code_amcsd 0000962
_chemical_formula_sum '(Al Si3) (K.89 Na.11) O8'
_cell_length_a 8.552
_cell_length_b 12.975
_cell_length_c 7.205
_cell_angle_alpha 90.09
_cell_angle_beta 115.92
_cell_angle_gamma 89.51
_cell_volume 719.031
_exptl_crystal_density_diffrn      2.555
_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
Al(1o)   0.00960   0.18500   0.22290   0.54000
Si(1o)   0.00960   0.18500   0.22290   0.46000
Si(1m)   0.00930   0.81650   0.22600   0.68000
Al(1m)   0.00930   0.81650   0.22600   0.32000
Si(2o)   0.70860   0.11830   0.34340   0.93000
Al(2o)   0.70860   0.11830   0.34340   0.07000
Si(2m)   0.70740   0.88290   0.34590   0.93000
Al(2m)   0.70740   0.88290   0.34590   0.07000
K   0.28380   0.99850   0.13660   0.89000
Na   0.28380   0.99850   0.13660   0.11000
O(A1)   0.99990   0.14420   0.99590   1.00000
O(A2)   0.63520   0.00120   0.28510   1.00000
O(Bo)   0.82550   0.14530   0.22630   1.00000
O(Bm)   0.82730   0.85520   0.23010   1.00000
O(Co)   0.03440   0.31290   0.25790   1.00000
O(Cm)   0.03530   0.69020   0.26160   1.00000
O(Do)   0.18420   0.12510   0.40640   1.00000
O(Dm)   0.18090   0.87410   0.40770   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Al(1o) 0.02200 0.01490 0.01350 -0.00320 0.00830 -0.00150
Si(1o) 0.02200 0.01490 0.01350 -0.00320 0.00830 -0.00150
Si(1m) 0.02110 0.01390 0.01310 0.00180 0.00830 0.00180
Al(1m) 0.02110 0.01390 0.01310 0.00180 0.00830 0.00180
Si(2o) 0.01910 0.01050 0.01270 -0.00050 0.00680 0.00030
Al(2o) 0.01910 0.01050 0.01270 -0.00050 0.00680 0.00030
Si(2m) 0.01910 0.01050 0.01310 -0.00090 0.00680 0.00000
Al(2m) 0.01910 0.01050 0.01310 -0.00090 0.00680 0.00000
K 0.01890 0.02540 0.02140 0.00000 0.00580 -0.00010
Na 0.01890 0.02540 0.02140 0.00000 0.00580 -0.00010
O(A1) 0.03250 0.01760 0.02310 0.00040 0.01280 0.00070
O(A2) 0.02850 0.01300 0.02140 -0.00080 0.00480 0.00030
O(Bo) 0.02950 0.03230 0.02640 -0.00360 0.01820 0.00140
O(Bm) 0.03030 0.03220 0.02880 0.00360 0.01860 0.00010
O(Co) 0.02480 0.01850 0.02290 -0.00320 0.00880 -0.00320
O(Cm) 0.02520 0.01980 0.02300 0.00270 0.00990 0.00440
O(Do) 0.02910 0.02070 0.01260 0.00040 0.00420 0.00140
O(Dm) 0.02830 0.02000 0.01310 -0.00200 0.00370 -0.00110