Cerianite-(Ce) Zaitsev A N, Chakhmouradian A R, Siidra O I, Spratt J, Williams C T, Stanley C J, Petrov S V, Britvin S N, Polyakova E A Mineralogical Magazine 75 (2011) 2813-2822 Fluorine-, yttrium- and lanthanide-rich cerianite-(Ce) from carbonatitic rocks of the Kerimasi volcano and surrounding explosion craters, Gregory Rift, northern Tanzania Locality: Gregory Rift, northern Tanzania _database_code_amcsd 0018569 5.4203 5.4203 5.4203 90 90 90 Fm-3m atom x y z occ Uiso CeA 0 0 .5 .62 .0093 YA 0 0 .5 .20 .0093 NdA 0 0 .5 .06 .0093 LaA 0 0 .5 .03 .0093 PrA 0 0 .5 .01 .0093 SmA 0 0 .5 .01 .0093 GdA 0 0 .5 .02 .0093 DyA 0 0 .5 .02 .0093 ErA 0 0 .5 .01 .0093 YbA 0 0 .5 .02 .0093 OX .25 .25 .25 .84 .0128 FX .25 .25 .25 .12 .0128