Boyleite
ZnSO₄ · 4 H₂O

     A last update for 2006 (29 Dec 06), finds boyleite as a new sulfate for mont Saint-Hilaire. Boyleite is a member of the rozenite group.

PHYSICAL CHARACTERISTICS:

Color is white.
Luster is vitreous to dull.
Diaphaneity is transparent to translucent.
Crystal System is monoclinic; P2₁/n.
Crystal Habits include powdery white efflorescences.
Cleavage: none observed.
Fracture is uneven.
Hardness is 2.
Specific Gravity is approximately 2.41 g/cm³.
Streak is white.
Associated Minerals include marcasite, melanterite and pyrrhotite.
Distinguishing Features: none.
Origin: Named in 1978, for Robert William Boyle (b. 1920),
   geochemist, Geological Survey of Canada.

CLASSIFICATION:

REFERENCES:
Dana 8:604 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend