The Collaborative International Dictionary of English v.0.48:

Fluocerine \Flu`o*ce"rine\, Fluocerite \Flu`o*ce"rite\, n.
   [Fluo- + cerium.] (Min.)
   A fluoride of cerium, occuring near Fahlun in Sweden.
   Tynosite, from Colorado, is probably the same mineral.
   [1913 Webster]