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Fluorapatite crystals - click for larger pic
Fluorapatite crystals
© Doug Merson

Fluorapatite crystals - click for larger pic
Fluorapatite crystals
© Modris Baum

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Home > Mineral Descriptions > Fluorapatite - (2 Photos)



Fluorapatite
Na26REE6(SiO3)6(PO4)6(CO3)6(S4+O2)O

     Fluorapatite is widespread at Mont Saint-Hilaire. It is far more abundant than the carbonate end-member.

PHYSICAL CHARACTERISTICS:

Color is colorless, occasionally pale yellow, pale green,
   pink, light to medium red, white and gray.
Luster is vitreous to dull.
Diaphaneity is transparent to translucent.
Crystal System is hexagonal; P63.
Crystal Habits include simple hexagonal prisms to 6mm terminated
   by basal pinacoids.
Cleavage {001} is distinct and {100} is indistinct.
Fracture is conchoidal to uneven.
Hardness is 5.
Specific Gravity is approximately 3.2 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, amphibole group,
   analcime, anatase, ancylite, arfvedsonite, astrophyllite, bastnäsite,
   biotite, calcite, catapleiite, chlorite group, dolomite, elpidite,
   epididymite, eudialyte, fluorite, gmelinite, harmotome, microcline,
   natrolite, pectolite, phlogopite, pyrite, pyrophanite, pyroxene group,
   pyrrhotite, quartz, rhodochrosite, rutile, siderite, titanite and zircon. Distinguishing Features: Crystal habit.
Origin: Named in 1788 for its composition: fluorine end-member of
   the apatite group.

CLASSIFICATION:

Dana System
# 41.8.1.1

Strunz Classification
# VII/B.39-10

REFERENCES:
MinRec 21:309-310 (1990), Dana 8:858-860 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
¤¤

MX
¤¤

SS
--

MC
¤¤

HF
¤¤

BR
¤¤

SX
¤¤

FR
--

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