Home Nepheline
VIII - Tectosilicates (Feldspar Group)
Crystal habit of Nepheline

Name   Nepheline
Chemistry   KNa3[AlSiO4]4
Hardness   5.5 - 6
Lustre   vitreous - greasy
Colour   white, light grey, clear
Streak   white
Density [g/cm3]   2.6
Crystal habit   hexagonal, crystals short columnar
Cleavage, Fracture   [1010] distinct, fracture conchoidal to uneven
other characteristics and occurrences   rock forming mineral in silica-poor rocks

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