Meionite
Antao S M, Hassan I
American Mineralogist 93 (2008) 1470-1477
Unusual Al-Si ordering in calcic scapolite, Me79.6, with increasing temperature
T = 594
_database_code_amcsd 0004647
12.2322 12.2322 7.5806 90 90 90 I4/m
atom     x     y     z  occ  Uiso
CaM  .3578 .2850     0 .794  .051
NaM  .3578 .2850     0 .206  .051
SiTl .1626 .0890     0  .75  .023
AlTl .1626 .0890     0  .25  .023
SiT2 .1594 .4151 .2069  .54 .0191
AlT2 .1594 .4151 .2069  .46 .0191
CA      .5    .5     0 .834  .035
SA      .5    .5     0 .146  .035
O1   .0412 .1470     0       .033
O2   .1857 .3796     0       .040
O3   .4501 .1497 .2117       .049
O4   .2663 .3707 .6702       .037
O5S  .3712 .5779 .1092 .073  .122
O6C  .5986 .5089     0 .625  .122