Teepleite

General Information: Chemical Formula:Na2B(OH)4Cl Composition:(Molecular Weight = 160.27 gm)Sodium 28.69 % NaBoron 6.74 % B Hydrogen 2.52 % H Chlorine 22.12 % ClOxygen 39.93 % O  Empirical Formula: Na2B(OH)4Cl Environment:Continental evaporate deposits. Locality:Borax lake, SE edge of Clear Lake, Lake Co., California.Physical Properties: Cleavage:[???] Indistinct Color:colorless or white. Density:2.076 Diaphaniety:Transparent Hardness:3-3.5 - Calcite-Copper Penny Luster:Vitreous - Greasy Streak:whiteMore details...