General Information:
Chemical Formula:Y3Si3O10(OH)
Composition:(Molecular Weight = 527.98 gm)Yttrium 50.52 %
Y Silicon 15.96 %
SiHydrogen 0.19 %
H Oxygen 33.33 %
O Empirical Formula: Y3Si3O10(OH)
IMA Status:Approved IMA 1987
Locality:Askagen, Vermland, Sweden.
Physical Properties: Cleavage:None
Color:pink, brownish green, or brown.
Density:4.2
Diaphaniety:Translucent to subtranslucent
Habits:Tabular - Form dimensions are thin in one direction., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:6-6.5 - Orthoclase-Pyrite
Luster:Vitreous (Glassy)
Streak:white
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