Osumilite
Armbruster T, Oberhansli R
American Mineralogist 73 (1988) 585-594
Crystal chemistry of double-ring silicates: Structural, chemical, and optical
variation in osumilites
Sample: Eifel-B93
_database_code_amcsd 0001151
10.071 10.071 14.303 90 90 120 P6/mcc
atom     x     y      z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
KC       0     0    .25 .48   .029   .029   .028  .0145      0      0
FeA    1/3   2/3    .25 .67  .0068  .0068  .0105  .0034      0      0
MgA    1/3   2/3    .25 .33  .0068  .0068  .0105  .0034      0      0
Si1  .2466 .3538 .39217 .85  .0113  .0137  .0100  .0063  .0018  .0006
Al1  .2466 .3538 .39217 .15  .0113  .0137  .0100  .0063  .0018  .0006
Fe2     .5    .5    .25 .08   .029   .029  .0177   .026      0      0
Al2     .5    .5    .25 .92   .029   .029  .0177   .026      0      0
O1   .1252 .4085      0       .026   .024   .010   .010      0      0
O2   .2208 .2878  .1323       .032   .036   .029   .027   .006   .001
O3   .1416 .4949  .1790       .022   .023  .0140   .015  -.002  -.002