Zakharovite

General Information: Chemical Formula:Na4Mn++5Si10O24(OH)6·6(H2O) Composition:(Molecular Weight = 1,241.63 gm)Sodium 7.41 % NaManganese 22.12 % MnSilicon 22.62 % SiHydrogen 1.46 % H Oxygen 46.39 % O  Empirical Formula: Na4Mn2+5Si10O24(OH)6·6(H2O) IMA Status:Approved IMA 1982Physical Properties: Cleavage:[0001] Perfect Color:yellow or bright yellow. Density:2.58 - 2.64, Average = 2.61 Hardness:2 - Gypsum Luster:Earthy (Dull) Streak:whiteMore details...

Na4Mn5Si10O24(OH)6 6(H2O)