Mimetite
Pb5(AsO4)3Cl

     Mimetite, a member of the apatite group, is an extremely rare secondary mineral at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually white or beige.
Luster is adamantine.
Diaphaneity is transparent to translucent.
Crystal System is hexagonal; P63/m.
Crystal Habits include minute needles.
Cleavage {001} is distinct and {100} is indistinct.
Fracture is conchoidal to uneven.
Hardness is 3.5 - 4.
Specific Gravity is approximately 7.3 g/cm3.
Streak is white.
Associated Minerals include aegirine, anglesite, arsenopyrite,
   beudantite, gonnardite, hemimorphite, hydrocerussite, microcline,
   muscovite, natrolite, pyrite, pyrrhotite and sphalerite.
Distinguishing Features: Crystal habit and luster.
Origin: Named in 1835 from the Greek mimetes, an imitator,
   alluding to its ressemblance to pyromorphite.

CLASSIFICATION:

Dana System
# 41.8.4.2

Strunz Classification
# VII/B.39-160

REFERENCES:
MinRec 21:323 (1990), Dana 8:866-877 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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