Enstatite

General Information: Chemical Formula:Mg2Si2O6 Composition:(Molecular Weight = 200.78 gm)Magnesium 24.21 % MgSilicon 27.98 % SiOxygen 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:grayMore details...