Home Neptunite
VIII - Inosilicates
Crystal habit of Neptunite Neptunite

Name   Neptunite
Chemistry   KNa2Li(Fe,Mn)2Ti2[O|Si4O11]2
Hardness   5 - 6
Lustre   vitreous
Colour   black to reddish black
Streak   brown 
Density [g/cm3]   3.23
Crystal habit   monoclinic, crystals prismatic, elongated
Cleavage, Fracture   [110] good (80° and 100°), fracture splintery
other characteristics and occurrences   in nepheline-syenites and cavities of nepheline-pegmatites

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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