Labradorite
Wenk H R, Joswig W, Tagai T, Korekawa M, Smith B K
American Mineralogist 65 (1980) 81-95
The average structure of An 62-66 labradorite
Verzasca x-ray
feldspar
_database_code_amcsd 0000761
8.151 12.829 7.103 93.62 116.21 89.7 C-1
atom      x      y      z  occ B(1,1) B(2,2) B(3,3)  B(1,2)  B(1,3)  B(2,3)
Ca1   .2679  .9787  .1659  .32 .00540 .00764 .01530 -.00184 0.00490 -.00570
Na1   .2679  .9787  .1659  .18 .00540 .00764 .01530 -.00184 0.00490 -.00570
Ca2   .2713  .0285  .1023  .32 .00364 .00293 .01000 0.00117 0.00089 -.00170
Na2   .2713  .0285  .1023  .18 .00364 .00293 .01000 0.00117 0.00089 -.00170
Si1  .00665 .16503 .21328 .592 .00342 .00177 .00440 -.00048 0.00140 0.00046
Al1  .00665 .16503 .21328 .407 .00342 .00177 .00440 -.00048 0.00140 0.00046
Si2  .00338 .81758 .23205 .592 .00335 .00172 .00347 0.00121 0.00119 0.00022
Al2  .00338 .81758 .23205 .407 .00335 .00172 .00347 0.00121 0.00119 0.00022
Si3  .68674 .10935 .31711 .592 .00226 .00082 .00400 0.00033 0.00082 0.00008
Al3  .68674 .10935 .31711 .407 .00226 .00082 .00400 0.00033 0.00082 0.00008
Si4  .68204 .87952 .35720 .592 .00263 .00108 .00460 0.00019 0.00141 0.00051
Al4  .68204 .87952 .35720 .407 .00263 .00108 .00460 0.00019 0.00141 0.00051
Oa1   .0033  .1303  .9779      .01000 .00364 .00850 0.00068 0.00550 0.00132
Oa2   .5833  .9932  .2788      .00500 .00187 .00790 -.00003 0.00170 0.00079
Obo   .8127  .1068  .1902      .00750 .00233 .01200 -.00047 0.00580 -.00008
Obm   .8170  .8527  .2466      .00840 .00309 .01910 0.00070 0.00810 -.00031
Oco   .0145  .2931  .2778      .00670 .00306 .01080 -.00088 0.00320 0.00073
Ocm   .0163  .6890  .2174      .00750 .00325 .00930 0.00238 0.00140 -.00085
Odo   .1990  .1082  .3850      .00710 .00265 .00710 -.00004 0.00090 0.00044
Odm   .1889  .8671  .4314      .00750 .00290 .00860 0.00044 0.00080 -.00045