Ganophyllite
(K,Na)₂(Mn,Al,Mg)₈(Si,Al)₁₂O₂₉(OH)₇ · 8-9H₂O

     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; A2/a.
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/cm³.
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:

REFERENCES:
MinRec 21:311 (1990), Dana 8:1554-1555 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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