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Fluoride of E, with Th, H₂O, CO₂, etc. Cer = 69·2-70·6; ThO₂ = 0-31%.

Hexagonal; in thick prisms.

G = 6·12-6·14. H = 4¹⁄₂-5. Wax yellow; transparent to translucent.

Fahlun and Österby, Sweden; Pike’s Peak, Colorado.