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Minerals - Hellandite-(Y) | TerraCollect
Mineral - Hellandite-(Y)
Hellandite-(Y)
(Ca,REE)â‚„Yâ‚‚Al â–¡2(Bâ‚„Siâ‚„Oâ‚‚â‚‚) (OH)â‚‚
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(Ca,REE)â‚„Yâ‚‚Al â–¡2(Bâ‚„Siâ‚„Oâ‚‚â‚‚) (OH)â‚‚
Unit Cell
Physical Properties
Hardness
4.5 - 6.5
Streak
Density
Optical Properties
Color
Birefringence
Luster
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Cleavage
Fracture
Tenacity
Space Group
Habit
Formation
Paragenesis
Twinning
Rarity
Synonyms
Hellandite-(Y)
