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 = 793
_database_code_amcsd 0004649
12.2618 12.2618 7.5841 90 90 90 I4/m
atom     x     y     z  occ  Uiso
CaM  .3580 .2852     0 .794  .060
NaM  .3580 .2852     0 .206  .060
SiTl .1629 .0882     0  .75  .025
AlTl .1629 .0882     0  .25  .025
SiT2 .1591 .4161 .2065  .54 .0212
AlT2 .1591 .4161 .2065  .46 .0212
CA      .5    .5     0 .834  .040
SA      .5    .5     0 .146  .040
O1   .0414 .1456     0       .040
O2   .1859 .3814     0       .045
O3   .4497 .1492 .2139       .056
O4   .2662 .3721 .6697       .041
O5S  .3700 .5785 .1081 .073  .137
O6C  .5976 .5076     0 .625  .137