Quintinite (Type Locality)
Mg₄Al₂(OH)₁₂(CO₃) · 3H₂O

     Quintinite-3T is a recently described species from Mont Saint-Hilaire. It had originally been identified as hydrotalcite back in 1976 before being assigned UK #58.

PHYSICAL CHARACTERISTICS:

Color is usually colorless or yellow.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is hexagonal; P3₁12 or P3₂12.
Crystal Habits include hexagonal and tabular crystals to 1mm.
Cleavage {0001} is perfect.
Fracture is (??).
Hardness is ~ 2.
Specific Gravity is approximately 2.14 g/cm³.
Streak is white.
Associated Minerals include aegirine, albite, analcime, ancylite
   donnayite, gonnardite and microcline.
Distinguishing Features: Crystal habits.
Origin: Named in 1992 after Colonel Quintin Wight (b. 1935), Canadian
   mineral collector and author of "The Complete Book of Micromounting".

CLASSIFICATION:

REFERENCES:
Dana 8:512 (1997), CanMin 35:1541-1549 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend