General Information:
Chemical Formula:
Y3Si3O10(OH)
Composition:
(Molecular Weight = 527.98 gm)
Yttrium 50.52 % Y
Silicon 15.96 % Si
Hydrogen 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
More details...