Arisite-(Ce) Piilonen P C, McDonald A M, Grice J D, Cooper M A, Kolitsch U, Rowe R, Gault R A, Poirier G Mineralogical Magazine 74 (2010) 257-268 Arisite-(La), a new REE-fluorcarbonate mineral from the Aris phonolite (Namibia), with descriptions of the crystal structures of arisite-(La) and arisite-(Ce) Locality: Aris, Namibia Note: x-coordinate of O1 adjusted to special position _database_code_amcsd 0014600 5.1109 5.1109 8.6713 90 90 120 P-6m2 atom x y z occ Uiso Na 0 0 0 .013 Ce 2/3 1/3 .72542 .47 .012 La 2/3 1/3 .72542 .40 .012 Pr 2/3 1/3 .72542 .02 .012 Nd 2/3 1/3 .72542 .05 .012 Sm 2/3 1/3 .72542 .01 .012 Ca 2/3 1/3 .72542 .05 .012 C1 1/3 2/3 .805 .013 O1 .6252 .8126 .8013 .017 F 2/3 1/3 0 .031 C2 0 0 .5 .70 .033 O2 .8475 .1525 .5 .70 .026 F2 .8475 .1525 .5 .20 .026