Hainite

General Information: Chemical Formula:Na2Ca4(Ti,Zr,Mn,Fe)2(Si2O7)F4 Composition:(Molecular Weight = 570.80 gm)Sodium 8.06 % NaCalcium 28.09 % CaZirconium 7.99 % ZrTitanium 9.23 % TiManganese 2.89 % MnIron 0.98 % FeSilicon 9.84 % SiOxygen 19.62 % O Fluorine 13.31 % F  Empirical Formula: Na2Ca4Ti1.1Zr0.5Mn2+0.3Fe2+0.1(Si2O7)F4Physical Properties: Cleavage:[???] Perfect Color:honey yellow or wine yellow. Density:3.148 Diaphaniety:Translucent Hardness:5 - Apatite Luster:Adamantine Streak:whiteMore details...