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Illite

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SHS41665

Illite

ex. Dr. Krantz (Bonn/Germany)

Description Tabs

Description
Locality: 
Rochester, Monroe County, New York, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 3.6 × 1.6 cm
Description

Green illite

Mineral Data
What's on the rock

Illite

Variety Of: 

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Formula: 
K0.65Al2.0[Al0.65Si3.35O10](OH)2
Hardness: 
1.0 - 2.0
Streak: 
White
Type Locality: 
Maquoketa Shale, Gilead, Calhoun Co., Illinois, USA