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 1978
Physical Properties: Cleavage:[???] Good
Color:black.
Density:3.2
Hardness:5-6 - Between Apatite and Orthoclase
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