Fluocerite

Fluocerite is a mineral, a cerium, lanthanum fluoride, formula (Ce,La)F₃. It is recognized as two different minerals depending on the cation, fluocerite-(Ce) and fluocerite-(La). Both crystallize in the hexagonal system.

Fluocerite-(Ce) was first described (without the Ce) in 1845 from hydrothermal veins in granite in Sweden. Fluocerite-(La) was first described in 1969 from the type locality in central Kazakhstan.

References

Mindat with locations
Webmineral Fluocerite-(Ce)
Webmineral Fluocerite-(La)

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