General Information:
Chemical Formula:
Zn2SiO4
Composition:
(Molecular Weight = 222.86 gm)
Zinc 58.68 % Zn
Silicon 12.60 % Si
Oxygen 28.72 % O
Empirical Formula:
Zn2(SiO4)
Environment:
Main ore mineral at Franklin, a metamorphosed zinc orebody.
Locality:
Franklin, Sussex Co., New Jersey, USA.
Name Origin:
After Willem I, King of the Netherlands (1772-1843).
Physical Properties:
Cleavage:
[0001] Poor, [1120] Poor
Color:
white, yellow, green, reddish brown, or black.
Density:
3.9 - 4.2, Average = 4.05
Diaphaniety:
Transparent to translucent to opaque
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Massive - Granular - Common texture observed in granite and other igneous rock., Massive - Uniformly indistinguisha ble crystals forming large masses.
Hardness:
5.5 - Knife Blade
Luminescence:
Fluorescent, Short UV=green.
Luster:
Vitreous - Resinous
Streak:
white
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