General Information:
Chemical Formula:KNa2Li(Fe++,Mn)2Ti2Si8O24
Composition:(Molecular Weight = 907.69 gm)Potassium 4.31 %
K Sodium 5.07 %
NaLithium 0.76 %
LiTitanium 10.55 %
TiManganese 3.03 %
MnIron 9.23 %
FeSilicon 24.75 %
SiOxygen 42.30 %
O Empirical Formula: KNa2LiFe2+1.5Mn2+0.5Ti2Si8O24
Locality:Benitoite mine, San Benito, Co., California, USA.
Physical Properties: Cleavage:[110] Good
Color:black or red.
Density:3.23
Diaphaniety:Translucent
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction., Crystalline - Coarse - Occurs as well-formed coarse sized cry stals.
Hardness:5-6 - Between Apatite and Orthoclase
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:brown
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