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