data_global
_chemical_name_mineral 'Microcline'
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 RC20C
;
_database_code_amcsd 0020538
_chemical_compound_source 'Adamello Massif, Northern Italy'
_chemical_formula_sum '(K.92 Na.08) (Al.99 Si3.01) O8'
_cell_length_a 8.567
_cell_length_b 12.970
_cell_length_c 7.221
_cell_angle_alpha 90.43
_cell_angle_beta 116.
_cell_angle_gamma 88.48
_cell_volume 720.890
_exptl_crystal_density_diffrn      2.553
_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
K1   0.28300   0.99500   0.13720   0.92000
Na1   0.28300   0.99500   0.13720   0.08000
Al1   0.00980   0.18650   0.21930   0.80000
Si1   0.00980   0.18650   0.21930   0.20000
Al2   0.00950   0.81840   0.22980   0.14000
Si2   0.00950   0.81840   0.22980   0.86000
Al3   0.71010   0.11950   0.34150   0.02500
Si3   0.71010   0.11950   0.34150   0.97500
Al4   0.70650   0.88450   0.34840   0.02500
Si4   0.70650   0.88450   0.34840   0.97500
O1   0.00000   0.14440   0.98750   1.00000
O2   0.63560   0.00370   0.28560   1.00000
O3   0.82230   0.14690   0.22250   1.00000
O4   0.82960   0.85620   0.23620   1.00000
O5   0.03490   0.31730   0.25440   1.00000
O6   0.03720   0.69340   0.26670   1.00000
O7   0.18750   0.12380   0.40590   1.00000
O8   0.17750   0.87410   0.41080   1.00000