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 = 296
_database_code_amcsd 0004644
12.1950 12.1950 7.5771 90 90 90 I4/m
atom     x     y     z  occ  Uiso
CaM  .3579 .2847     0 .794  .040
NaM  .3579 .2847     0 .206  .040
SiTl .1623 .0903     0  .75  .020
AlTl .1623 .0903     0  .25  .020
SiT2 .1594 .4139 .2070  .54 .0150
AlT2 .1594 .4139 .2070  .46 .0150
CA      .5    .5     0 .834  .023
SA      .5    .5     0 .146  .023
O1   .0408 .1481     0       .022
O2   .1856 .3772     0       .030
O3   .4506 .1501 .2095       .038
O4   .2663 .3686 .6706       .030
O5S  .3730 .5782 .1081 .073  .103
O6C  .5996 .5100     0 .625  .103