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Poudretteite crystal
CMN #4061
Photo by Robert Gault
© Reproduced courtesy of Canadian
Museum of Nature
Ottawa, Canada
Poudretteite crystal
Photo by Robert Gault
© Reproduced courtesy of Canadian
Museum of Nature
Ottawa, Canada
KNaSi1230
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; 6/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/cm
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
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