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Chkalovite crystals - click for larger pic
Chkalovite crystal
Photo by Douglas Merson
© Douglas Merson

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Chkalovite
Na2BeSi2O6

     The occurrence of chkalovite at Mont Saint-Hilaire is extremely rare. It is also difficult to recognize.

PHYSICAL CHARACTERISTICS:

Color is usually colorless.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is orthorhombic; F2dd.
Crystal Habits include complex equant crystals.
Cleavage is not apparent.
Fracture is conchoidal.
Hardness is 6.
Specific Gravity is approximately 2.7 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, lovozerite group,
   lueshite, sérandite, sodalite, steenstrupine, ussingite and
   villiaumite.
Distinguishing Features: none.
Origin: Named in 1939 for Valery Pavlovich Chkalov (1904-1938),
   Russian aviator who made the first flight over the North Pole from
   Moscow to the United States.

CLASSIFICATION:

Dana System
# 65.5.2.1

Strunz Classification
# VIII/J.4-10

REFERENCES:
MinRec 21:303 (1990), Dana 8:1332 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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