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 = 396
_database_code_amcsd 0004645
12.2067 12.2067 7.5780 90 90 90 I4/m
atom      x      y     z  occ  Uiso
CaM   .3578  .2849     0 .794  .043
NaM   .3578  .2849     0 .206  .043
SiTl  .1623  .0897     0  .75  .021
AlTl  .1623  .0897     0  .25  .021
SiT2  .1593  .4142 .2071  .54 .0162
AlT2  .1593  .4142 .2071  .46 .0162
CA       .5     .5     0 .834  .024
SA       .5     .5     0 .146  .024
O1    .0408  .1479     0       .024
O2   .18570 .37799     0       .032
O3   .45053 .14988 .2102       .041
O4   .26645 .36926 .6703       .032
O5S   .3705  .5809 .1078 .073  .109
O6C   .5991  .5100     0 .625  .109