General Information:
Chemical Formula:
(NH4,K)Al2(Si3Al)O10(OH)2
IMA Status:
Approved IMA 1982
Physical Properties:
Cleavage:
[001] Perfect
Color:
yellowish green or pearly white.
Density:
2.58
Diaphaniety:
Transparent
Habits:
Massive - Fibrous - Distinctly fibrous fine-grained forms., Scaly - Morphology like fish scales.,
Hardness:
2 - Gypsum
Luster:
Vitreous (Glassy)
Streak:
white
More details...