Glendonite (White Sea flyer) is a pseudomorph of aragonite after ikaite. It occurs only in three places in the world: on Olenitsa on the White Sea, on Taimyr and in Australia (where it was first described in the Glendenbrook area).
You can see glendonite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Carbonate mineral, hydrous carbonates subgroup |
Formula (repeating unit) |
CaCO3·6H2O |
IMA symbol | Ika |
Strunz classification | 5.CB.25 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | C2/c |
Identification | |
Color | White when pure |
Crystal habit | Nearly square prism; pyramidal; sigmoidal: square prism capped with oppositely canted pyramids; massive, tubular (tinolite vr.) |
Mohs scale hardness | 3 |
Luster | Dull |
Streak | White |
Specific gravity | 1.83 |
Optical properties | Biaxial (−) |
Refractive index | nα = 1.455 nβ = 1.538 nγ = 1.545[4] |
Birefringence | d = 0.090 |
Other characteristics | Decomposes into water and calcite above 8 °C |