Xonotlite

General Information: Chemical Formula:Ca6Si6O17(OH)2 Composition:(Molecular Weight = 714.99 gm)Calcium 33.63 % CaSilicon 23.57 % SiHydrogen 0.28 % H Oxygen 42.52 % O  Empirical Formula: Ca6Si6O17(OH)2 Locality:Santa Ynez, Santa Barbara Co., Califonia, USA.Physical Properties: Cleavage:[???] Good Color:colorless, gray, lemon white, light gray, or pink. Density:2.7 Diaphaniety:Transparent Habits:Acicular - Occurs as needle-like crystals., Massive - Uniformly indistinguishable crystals forming large masses., Hardness:6.5 - Pyrite Luminescence:Non-fluorescent. Luster:Vitreous - Silky Streak:whiteMore details...