Fluorbritholite-(Ce) (Type Locality)
(REE,Ca)₅(Si,P)₃O₁₂F

     Fluorbritholite-(Ce) is rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually pale yellow, tan or reddish-brown.
Luster is adamantine.
Diaphaneity is translucent to opaque.
Crystal System is hexagonal; P6₃/ma.
Crystal Habits include aggregates of radiating prismatic crystals.
Cleavage {0001} is perfect.
Fracture is even to conchoidal.
Hardness is 5.
Specific Gravity is approximately 4.66 g/cm³.
Streak is colorless to pale brown.
Associated Minerals include (??).
Distinguishing Features: Crystal habits.
Origin: Named in 1994 for its composition: fluorine-rich analog
   of britholite-(Ce).

CLASSIFICATION:

REFERENCES:
JWUT 9:9-14 (1994), Dana 8:1104 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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