Anorthite
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
Note: studied with X-rays
Locality: Surtsey, Iceland
_database_code_amcsd 0019662
8.1736 12.8736 7.1022 93.462 116.054 90.475 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   .2665  .9862  .1649 .325  .0047  .0095  .0156  -.0023  0.0048  -.0074
Na1   .2665  .9862  .1649 .160  .0047  .0095  .0156  -.0023  0.0048  -.0074
Ca2   .2723  .0306  .0952 .325  .0034 .00276  .0087 0.00127  0.0011 -.00157
Na2   .2723  .0306  .0952 .160  .0034 .00276  .0087 0.00127  0.0011 -.00157
Si1  .00632 .16304 .21518 .595  .0033  .0012  .0042 -.00043 0.00153 0.00022
Al1  .00632 .16304 .21518 .405  .0033  .0012  .0042 -.00043 0.00153 0.00022
Si2  .00264 .81626 .23099 .595 .00342 .00126 .00389 0.00090 0.00145 0.00020
Al2  .00264 .81626 .23099 .405 .00342 .00126 .00389 0.00090 0.00145 0.00020
Si3  .68589 .10882 .31775 .595  .0030 .00091  .0062 0.00024 0.00144 0.00013
Al3  .68589 .10882 .31775 .405  .0030 .00091  .0062 0.00024 0.00144 0.00013
Si4  .68100 .87870 .35715 .595  .0025  .0007  .0049 0.00017 0.00128 0.00043
Al4  .68100 .87870 .35715 .405  .0025  .0007  .0049 0.00017 0.00128 0.00043
Oa1   .0042  .1290  .9811       .0114 .00287  .0080 0.00101  0.0058 0.00086
Oa2   .5798  .9914  .2789       .0043 .00146  .0099 0.00017  0.0026 0.00079
Obo   .8131  .1037  .1886       .0082 .00192  .0147 -.00041  0.0067 -.00031
Obm   .8156  .8532  .2435       .0082 .00269  .0212 0.00081  0.0079 -.00070
Oco   .0139  .2895  .2818       .0072 .00242  .0122 -.00056  0.0045 0.00048
Ocm   .0125  .6869  .2133       .0074 .00244  .0097 0.00181  0.0021 -.00020
Odo   .1979  .1073  .3822       .0070 .00226  .0086 0.00060  0.0015 0.00050
Odm   .1900  .8661  .4292       .0075 .00263  .0118 0.00085  -.0001 -.00062