Wadeite
K2ZrSi3O9

     Wadeite is another rare species from MSH.

PHYSICAL CHARACTERISTICS:

Color is usually white.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is hexagonal, P6.
Crystal Habits include stacked, hexagonal crystals and tabular
   crystals.
Cleavage none observed.
Fracture is conchoidal.
Hardness is 5.5 - 6.
Specific Gravity is approximately 3.1 g/cm3.
Streak is white.
Associated Minerals include albite.
Distinguishing Features: Crystal habits.
Origin: Named in 1939 after Arthur Wade (1878-1951), British-born
   geologist.

CLASSIFICATION:

Dana System
# 59.1.1.4

Strunz Classification
# VIII/E.01-40

REFERENCES:
Dana 8:1223 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend