Pringleite

General Information: Chemical Formula:Ca9B26O34(OH)24Cl4·13(H2O) Composition:(Molecular Weight = 1,969.93 gm)Calcium 18.31 % CaBoron 14.27 % B Hydrogen 2.56 % H Chlorine 7.20 % ClOxygen 57.66 % O  Empirical Formula: Ca9B26O34(OH)24Cl4·13(H2O) IMA Status:Approved IMAPhysical Properties: Cleavage:[???] Good Color:colorless, light yellow, or orange. Density:2.21 Diaphaniety:Transparent Hardness:3-4 - Calcite-Fluorite Luster:Vitreous (Glassy) Streak:whiteMore details...

Ca9B26O34(OH)24Cl4 13(H2O)