Pargasite
Makino K, Tomita K
American Mineralogist 74 (1989) 1097-1105
Cation distribution in the octahedral sites of hornblendes
sample P-P from Parau Island
_database_code_amcsd 0001270
9.834 18.01 5.297 90 105.04 90 C2/m
atom     x     y     z  occ Biso
Si1  .2816 .0852 .3009  .60 0.39
Al1  .2816 .0852 .3009  .40 0.39
Si2  .2914 .1725 .8113  .89 0.39
Al2  .2914 .1725 .8113  .11 0.39
Mg1      0 .0879    .5 .759 0.67
Fe1      0 .0879    .5 .241 0.67
Mg2      0 .1768     0 .763 0.41
Fe2      0 .1768     0 .237 0.41
Mg3      0     0     0 .764 0.47
Fe3      0     0     0 .236 0.47
Ca4      0 .2785    .5 .930 0.91
Mg4      0 .2785    .5 .011 0.91
Fe4      0 .2785    .5 .059 0.91
NaAm .0292    .5 .1245  .57 2.48
NaA2     0 .4793     0  .57 2.36
O1   .1074 .0874 .2160      0.79
O2   .1197 .1733 .7316      0.68
OH3  .1087     0 .7157      0.84
O4   .3672 .2497 .7875      0.90
O5   .3495 .1403 .1100      0.90
O6   .3440 .1165 .6070      0.99
O7   .3393     0 .2745      1.08