data_9001258
_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 from Val Pasmeda
;
_chemical_formula_sum 'Si2 Al2 Ca O8'
_cell_length_a 8.175
_cell_length_b 12.873
_cell_length_c 14.170
_cell_angle_alpha 93.11
_cell_angle_beta 115.89
_cell_angle_gamma 91.28
_cell_volume 1337.803
_symmetry_space_group_name_H-M 'P -1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1ooo   0.00904   0.15894   0.10386
Si1ooi   0.50665   0.65605   0.60445
Al1ozo   0.00690   0.16089   0.61115
Al1ozi   0.49879   0.66603   0.11286
Al1moo   0.99092   0.81531   0.11757
Al1moi   0.50825   0.31457   0.62136
Si1mzo   0.00575   0.81526   0.61320
Si1mzi   0.50496   0.32029   0.11026
Al2ooo   0.68435   0.11315   0.15122
Al2ooi   0.19100   0.61115   0.66770
Si2ozo   0.68169   0.10345   0.66468
Si2ozi   0.17068   0.60668   0.14905
Si2moo   0.67389   0.88291   0.18770
Si2moi   0.17613   0.37932   0.67334
Al2mzo   0.68138   0.87158   0.67242
Al2mzi   0.18553   0.37759   0.18164
Caooo   0.26523   0.98609   0.08693
Cazoo   0.26832   0.03126   0.54304
Caoio   0.77351   0.53587   0.54123
Cazio   0.76369   0.50512   0.07510
Oa1oo   0.02635   0.12457  -0.00428
Oa1oi   0.48603   0.62359   0.48586
Oa1zo   0.98113   0.12562   0.48359
Oa1zi   0.51786   0.62378   0.99651
Oa2oo   0.57574   0.99057   0.14338
Oa2oi   0.07210   0.48813   0.63456
Oa2zo   0.57228   0.98916   0.63698
Oa2zi   0.07158   0.49243   0.13830
Obooo   0.81332   0.10161   0.07982
Obooi   0.33309   0.59521   0.60532
Obozo   0.81173   0.09671   0.60573
Obozi   0.28569   0.60336   0.07915
Obmoo   0.81766   0.85491   0.14437
Obmoi   0.29842   0.35545   0.61105
Obmzo   0.81051   0.85210   0.60254
Obmzi   0.34213   0.35770   0.13423
Ocooo   0.01512   0.27924   0.13539
Ocooi   0.50954   0.77721   0.63499
Ocozo   0.02009   0.28987   0.64767
Ocozi   0.50873   0.79649   0.14990
Ocmoo   0.00000   0.67999   0.10383
Ocmoi   0.51681   0.17933   0.61037
Ocmzo   0.00842   0.68854   0.60059
Ocmzi   0.50708   0.19585   0.09759
Odooo   0.18316   0.10620   0.19221
Odooi   0.70057   0.60747   0.67826
Odozo   0.21355   0.10335   0.68352
Odozi   0.68942   0.60354   0.20053
Odmoo   0.20373   0.87344   0.20979
Odmoi   0.68899   0.36361   0.73272
Odmzo   0.17272   0.85643   0.71921
Odmzi   0.70014   0.37048   0.19680