Revdite
Na16{Si4O6(OH)5}2{Si8O15(OH)6(OH)10 · 28H2O

     Revdite is extremely rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually colorless or white.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is monoclinic; C2.
Crystal Habits include acicular spherical masses to 2cm.
Cleavage {001} is micaceous.
Fracture is not apparent due to cleavage.
Hardness is 2.
Specific Gravity is approximately 1.95 g/cm3.
Streak is white.
Associated Minerals include aegirine, eudialyte, kogarkoite,
   lovozerite, sodalite, ussingite and villiaumite.
Distinguishing Features: Crystal habit.
Origin: Named in 1980 after its discovery locality, near the village
   of Revda, Russia.

CLASSIFICATION:

Dana System
# 74.3.6.1

Strunz Classification
# VIII/H.05-40

REFERENCES:
Dana 8:1566 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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