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Shomiokite-(Y) crystals
© Doug Merson
Shomiokite-(Y) crystals
© Modris Baum
Shomiokite-(Y) crystals
© Modris Baum
Na(Y,Dy)(CO · 3H
Shomiokite-(Y) is extremely rare at MSH. It was originally described in 1982 in Russia, although the irregular grains proved to be unsuitable for
X-ray diffraction. The crystal structure of shomiokite-(Y) was possible with the Mont Saint-Hilaire material.
PHYSICAL CHARACTERISTICS:
Color is usually pale-yellow or colorless.
Luster is silky.
Diaphaneity is transparent to translucent.
Crystal System is orthorhombic;
Crystal Habits include striated short prismatic crystals and crystalline
masses.
Cleavage {110} is perfect.
Fracture is (??).
Hardness is 2 – 3.
Specific Gravity is approximately 2.5 g/cm
Streak is white.
Associated Minerals include aegirine, albite, analcime, catapleiite,
eudialyte, microcline, petersenite, rhodochrosite, sphalerite and UK #91.
Distinguishing Features: Crystal habit.
Origin: Named in 1992 after its discovery locality near the Shomiok River,
Kola Peninsula, Russia.
CLASSIFICATION:
Dana System
# 15.4.7.1
Strunz Classification
# V/D.03-05
REFERENCES:
CanMin 34:649-655 (1996), Dana 8:474 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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Shomiokite-(Y) crystals
© Modris Baum
Shomiokite-(Y) crystals
© Stephan Wolfsried
Shomiokite-(Y) crystals
© David Joyce