Ferrokaersutite

General Information: Chemical Formula:NaCa2(Fe++4Ti)Si6Al2O22(OH)2 Composition:(Molecular Weight = 998.89 gm)Sodium 2.30 % NaCalcium 8.02 % CaTitanium 4.79 % TiAluminum 5.40 % AlIron 22.36 % FeSilicon 16.87 % SiHydrogen 0.20 % H Oxygen 40.04 % O  Empirical Formula: NaCa2Fe3+4Ti(Si6Al2O23)(OH)2 IMA Status:Approved IMA 1978Physical Properties: Cleavage:[???] Good Color:black. Density:3.2 Hardness:5-6 - Between Apatite and OrthoclaseMore details...