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 = 101 _database_code_amcsd 0004642 12.1736 12.1736 7.5757 90 90 90 I4/m atom x y z occ Uiso CaM .3579 .2844 0 .794 .033 NaM .3579 .2844 0 .206 .033 SiTl .1621 .0911 0 .75 .017 AlTl .1621 .0911 0 .25 .017 SiT2 .1593 .4134 .2071 .54 .0132 AlT2 .1593 .4134 .2071 .46 .0132 CA .5 .5 0 .834 .016 SA .5 .5 0 .146 .016 O1 .0406 .1488 0 .016 O2 .1856 .3755 0 .024 O3 .4508 .1504 .2083 .031 O4 .2661 .3674 .6713 .027 O5S .3791 .5738 .1065 .073 .095 O6C .6003 .5113 0 .625 .095