(K,Na)(Mn,Al,Mg)(Si,Al)1229(OH) · 8-9H
Ganophyllite is a rare mineral at Mont Saint-Hilaire.
PHYSICAL CHARACTERISTICS:
Color ranges from brown to orange-red.
Luster is vitreous or greasy.
Diaphaneity is transparent to translucent.
Crystal System is monoclinic; 2/
Crystal Habits include acicular crystals to 2mm with rectangular
cross-sections in random oriented groups.
Cleavage {001} is perfect.
Fracture is (?).
Hardness is 4 – 4.5
Specific Gravity is approximately 2.84 g/cm
Streak is brownish.
Associated Minerals include albite, analcime, apophyllite series,
astrophyllite, labuntsovite, microcline and rhodochrosite.
Distinguishing Features: Crystal habit.
Origin: Named in 1890 from the Greek ganos, bright, plus phyllon
a leaf, alluding to the high luster on its cleavage laminae.
CLASSIFICATION:
Dana System
# 74.1.2.1
Strunz Classification
# VIII/H.17-60
REFERENCES:
MinRec 21:311 (1990), Dana 8:1554-1555 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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