NaCl
The occurrence of halite at Mont Saint-Hilaire is exceedingly rare mineral in Canada. It is found as a white flaky alteration with UK #81 and an undetermined sulfate mineral on UK #81.
PHYSICAL CHARACTERISTICS:
Color is usually white.
Luster is vitreous to earthy.
Diaphaneity is translucent to opaque.
Crystal System is isometric; Fm3m.
Crystal Habits include pure white flaky alterations up to 0.5mm thick.
Cleavage {001} is perfect.
Fracture is conchoidal.
Hardness is 2.
Specific Gravity is approximately 2.2 g/cm3.
Streak is white.
Associated Minerals include aegirine, sérandite, sodalite, ussingite,
vuonnemite and UK #81. Distinguishing Features: Crystal habit.
Origin: Named in antiquity from the Greek hals, salt.
CLASSIFICATION:
Dana System
# 9.1.1.1
Strunz Classification
# III/A.02-30
REFERENCES:
MinRec 21:313 (1990), Dana 8:373-375 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH PE AP MX SS MC HF BR SX FR
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