Hanawaltite

General Information: Chemical Formula:Hg+6Hg++[Cl,(OH)]2O3 Composition:(Molecular Weight = 1,513.81 gm)Mercury 92.75 % HgHydrogen 0.03 % H Chlorine 3.51 % ClOxygen 3.70 % O  Empirical Formula: Hg6HgCl1.5(OH)0.5O3 Environment:On a fracture surface in a brecciated silica-carbonate rock composed mainly of ferroan magnesite and quartz. IMA Status:Approved IMA Locality:Clear Creek claim, New Idria district, San Benito County, California, USA. Name Origin:For Dr. J. Donald Hanawalt (1903-1987), a pioneer in the field of X-ray powder diffraction.Physical Properties: Cleavage:[001] Good Color:black, dark brown black, or dark red brown. Density:9.52 Diaphaniety:Opaque to translucent Habits:Anhedral Grains - Granular minerals without the expression of crystal shapes, , Hardness:4 - Fluorite Luminescence:Non-fluorescent. Luster:Metallic Streak:dark reddish blackMore details...