data_9001261
_chemical_name 'Anorthite'
loop_
_publ_author_name
'Angel R J'
'Carpenter M A'
'Finger L W'
_journal_name_full "American Mineralogist"
_journal_volume 75
_journal_year 1990
_journal_page_first 150
_journal_page_last 162
_publ_section_title
;
 Structural variation associated with compositional variation and order-disorder
 behavior in anorthite-rich feldspars
 sample #115082a
;
_chemical_formula_sum 'Si Al Ca O4'
_cell_length_a 8.178
_cell_length_b 12.870
_cell_length_c 14.175
_cell_angle_alpha 93.17
_cell_angle_beta 115.97
_cell_angle_gamma 91.15
_cell_volume 1337.598
_symmetry_space_group_name_H-M 'I -1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1oo   0.00780   0.15800   0.10420
Al1oz   0.00250   0.16420   0.61190
Al1mo  -0.00010   0.81510   0.11940
Si1mz   0.00540   0.81760   0.61200
Al2oo   0.68790   0.11200   0.15880
Si2oz   0.67650   0.10540   0.65770
Si2mo   0.67600   0.88150   0.18130
Al2mz   0.68310   0.87480   0.67660
Caooo   0.26580   0.98590   0.08650
Cazoo   0.26810   0.03010   0.54590
Caoio   0.77370   0.53500   0.54290
Cazio   0.76360   0.50200   0.07700
Oa1o   0.00760   0.12470  -0.00870
Oa1z  -0.00350   0.12480   0.48930
Oa2o   0.57560   0.99010   0.13960
Oa2z   0.57170   0.99100   0.63760
Oboo   0.82160   0.09940   0.09100
Oboz   0.79940   0.10060   0.59360
Obmo   0.80880   0.85490   0.12820
Obmz   0.82240   0.85500   0.61530
Ocoo   0.01200   0.27870   0.13530
Ocoz   0.01440   0.29410   0.64840
Ocmo   0.00760   0.67990   0.10730
Ocmz   0.00780   0.69200   0.59950
Odoo   0.19100   0.10650   0.18690
Odoz   0.20290   0.10350   0.69150
Odmo   0.19760   0.86850   0.21930
Odmz   0.18540   0.86250   0.71050