data_9000746
_chemical_name 'Labradorite'
loop_
_publ_author_name
'Wenk H R'
'Joswig W'
'Tagai T'
'Korekawa M'
'Smith B K'
_journal_name_full "American Mineralogist"
_journal_volume 65
_journal_year 1980
_journal_page_first 81
_journal_page_last 95
_publ_section_title
;
 The average structure of An 62-66 labradorite
 Lake County x-ray
 feldspar
;
_chemical_formula_sum 'Ca.317 Na.183 Si1.174 Al.824 O4'
_cell_length_a 8.1747
_cell_length_b 12.8706
_cell_length_c 7.1014
_cell_angle_alpha 93.461
_cell_angle_beta 116.086
_cell_angle_gamma 90.514
_cell_volume 669.302
_symmetry_space_group_name_H-M 'C -1'
loop_
_symmetry_equiv_pos_as_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
Ca1   0.26630   0.98340   0.16870   0.31700
Na1   0.26630   0.98340   0.16870   0.18300
Ca2   0.27090   0.03000   0.09700   0.31700
Na2   0.27090   0.03000   0.09700   0.18300
Si1   0.00588   0.16271   0.21481   0.58700
Al1   0.00588   0.16271   0.21481   0.41200
Si2   0.00275   0.81645   0.23109   0.58700
Al2   0.00275   0.81645   0.23109   0.41200
Si3   0.68425   0.10878   0.31709   0.58700
Al3   0.68425   0.10878   0.31709   0.41200
Si4   0.68086   0.87873   0.35765   0.58700
Al4   0.68086   0.87873   0.35165   0.41200
Oa1   0.00270   0.12810   0.97960   1.00000
Oa2   0.57870   0.99130   0.27770   1.00000
Obo   0.81210   0.10330   0.18790   1.00000
Obm   0.81520   0.85400   0.24350   1.00000
Oco   0.01410   0.28920   0.28300   1.00000
Ocm   0.01150   0.68660   0.21180   1.00000
Odo   0.19760   0.10650   0.38160   1.00000
Odm   0.19060   0.86570   0.43070   1.00000