Osumilite
Armbruster T, Oberhansli R
American Mineralogist 73 (1988) 585-594
Crystal chemistry of double-ring silicates: Structural, chemical, and optical
variation in osumilites
Japan-Hayasaki
_database_code_amcsd 0001154
10.150 10.150 14.286 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 .76   .031   .031   .034  .0155      0      0
FeA     1/3    2/3    .25 .58  .0066  .0066  .0097  .0033      0      0
MgA     1/3    2/3    .25 .42  .0066  .0066  .0097  .0033      0      0
Si1  .24738 .35055 .39187 .86   .088  .0105  .0069  .0056  .0014  .0014
Al1  .24738 .35055 .39187 .14   .088  .0105  .0069  .0056  .0014  .0014
Fe2      .5     .5    .25 .07  .0105  .0105  .0069  .0080      0      0
Al2      .5     .5    .25 .93  .0105  .0105  .0069  .0080      0      0
O1    .1198  .4041      0       .027   .019  .0080   .010      0      0
O2    .2144  .2830  .1319       .025   .035  .0233  .0239 -.0011 -.0036
O3    .1371  .4905  .1789      .0159  .0167  .0123  .0098 -.0030 -.0048