Home Adularia
VIII - Tectosilicates (Feldspar Group)		 Crystal habit of Adularia
 
Name   Adularia
Chemistry   K[AlSi3O8]
Hardness   6
Lustre   pearly - vitreous
Colour   colourless, white
Streak   white 
Density [g/cm3]   2.55
Crystal habit   monoclinic, crystals prismatic, pseudorhombic
Cleavage, Fracture   [001] perfect, [010] good, fracture conchoidal to uneven
other characteristics and occurrences   cf. orthoclase, sanidine
mineral in alpine fissures, potassium feldspar, formed at low temperature
   
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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