Lecontite

General Information: Chemical Formula:(NH4,K)Na(SO4)·2(H2O) Composition:(Molecular Weight = 178.39 gm)Potassium 5.48 % K Sodium 12.89 % NaHydrogen 3.96 % H Sulfur 17.98 % S Nitrogen 5.89 % N Oxygen 53.81 % O  Empirical Formula: NH40.75K0.25Na(SO4)·2(H2O)Physical Properties: Cleavage:[011] Distinct Color:colorless. Density:1.745 Diaphaniety:Transparent Hardness:2-2.5 - Gypsum-Finger Nail Luster:Vitreous (Glassy) Streak:whiteMore details...