General Information:
Chemical Formula:
Mg2Si2O6
Composition:
(Molecular Weight = 200.78 gm)
Magnesium 24.21 % Mg
Silicon 27.98 % Si
Oxygen 47.81 % O
Empirical Formula:
Mg2Si2O6
Environment:
Magmatic mafic rocks.
IMA Status:
Approved IMA
Locality:
Common worldwide.
Name Origin:
From the Greek enstates - "opponent."
Physical Properties:
Cleavage:
[110] Distinct, [010] Distinct
Color:
white, yellowish green, brown, greenish white, or gray.
Density:
3.1 - 3.3, Average = 3.2
Diaphaniety:
Translucent to opaque
Habits:
Massive - Fibrous - Distinctly fibrous fine-grained forms., Lamellar - Thin laminae producing a lamellar structure.,
Hardness:
5.5 - Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Streak:
gray
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