Brianyoungite

General Information: Chemical Formula:Zn3(CO3,SO4)(OH)4 Composition:(Molecular Weight = 333.22 gm)Zinc 58.87 % ZnHydrogen 1.21 % H Carbon 2.70 % C Sulfur 2.41 % S Oxygen 34.81 % O  Empirical Formula: Zn3(CO3)0.75(SO4)0.25(OH)4 IMA Status:Approved IMA 1991Physical Properties: Cleavage:[???] Perfect Color:colorless. Density:3.93 - 4.09, Average = 4.01 Diaphaniety:Transparent Hardness:2-2.5 - Gypsum-Finger Nail Luster:Vitreous (Glassy) Streak:whiteMore details...

Zn12(CO3)3(SO4)(OH)16