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Poudretteite crystals - click for larger pic
Poudretteite crystal
CMN #4061
Photo by Robert Gault
© Reproduced courtesy of Canadian
Museum of Nature

Ottawa, Canada

Poudretteite crystals - click for larger pic
Poudretteite crystal
Photo by Robert Gault
© Reproduced courtesy of Canadian
Museum of Nature

Ottawa, Canada

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Home > Mineral Descriptions > Poudretteite (TL) - (2 Photos)



Poudretteite (Type Locality)
KNa2B3Si12O30

     Poudretteite, a member of the milarite group, was first described from MSH. It occurs rarely at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually colorless to very pale pink.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is hexagonal; P6/mcc.
Crystal Habits include rough hexagonal crystals, and etched barrel-
   shaped prisms to 5mm.
Cleavage is not observed.
Fracture is splintery to conchoidal.
Hardness is 5.
Specific Gravity is approximately 2.5 g/cm3.
Streak is white.
Associated Minerals include aegirine, apophyllite series and pectolite.
Distinguishing Features: Crystal habit and etching of crystals.
Origin: Named in 1987 after the Poudrette family, operators of the quarry
   in which the mineral was found.

CLASSIFICATION:

Dana System
# 63.2.1a.8

Strunz Classification
# VIII/E.22-10

REFERENCES:
CanMin 25:763-766 (1987) ,MinRec 21:330 (1990), Dana 8:1275 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
¤¤

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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