Kalifersite

General Information: Chemical Formula:(K,Na)5Fe+++7Si20O50(OH)6·12(H2O) Environment:In a hydrothermally altered pegmatite. Polysomatic series with palygorskite and sepiolite. IMA Status:Approved IMA (Dana # Added) Locality:Mt. Kukisvumchorr, Khibina massif, Kola Peninsula, Russia. Name Origin:For the chemical composition: KALIum (Potassium), FERrum (Iron), and SIlicium (Silicon).Physical Properties: Cleavage:[100] Good, [010] Good Color:brownish pink. Density:2.28 - 2.37, Average = 2.32 Diaphaniety:Translucent Habits:Fibrous - Crystals made up of fibers., , Hardness:2 - Gypsum Luminescence:Non-fluorescent. Luster:Silky Streak:whiteMore details...