Osumilite
Seryotkin Y V, Sokol E V, Bakakin V V, Likhacheva A Y
European Journal of Mineralogy 20 (2008) 191-198
Pyrometamorphic osumilite: occurrence, paragenesis, and crystal structure as compared to cordierite
Locality: South Urals, Russia
_database_code_amcsd 0007256
10.0999 10.0999 14.3355 90 90 120 P6/mcc
atom      x      y      z  occ  Uiso
SiT1 .24852 .35307 .39220  .84 .0105
AlT1 .24852 .35307 .39220  .16 .0105
AlT2     .5     .5    .25  .96 .0129
FeT2     .5     .5    .25  .04 .0129
O1    .1220  .4080      0      .0206
O2    .2165  .2851 .13129      .0254
O3   .13905 .49343 .17921      .0143
MgA     1/3    2/3    .25  .89 .0121
FeA     1/3    2/3    .25  .07 .0121
MnA     1/3    2/3    .25  .02 .0121
TiA     1/3    2/3    .25  .02 .0121
KC        0      0    .25 .829 .0362
NaB     1/3    2/3   .019 .026   .05