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June 22, 2018 Weekly Geology Guest, Vermiculite

June 22, 2018
Greetings from the Bluff Park Back Porch, way up yonder on Shades Mountain (1,109′) in Alabama:
 
 
Vermiculite is a hydrous phyllosilicate mineral. It undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and the effect is routinely produced in commercial furnaces.
(Mg,Fe+2,Fe+3)3[(Al,Si)4O10])
 
Use in very numerous heat sensitive items.  High temperature brick, brake linings, insulation, soil conditioners, and etc.
 
Vermmiculite
VermiculiteUSGOV.jpg
 
 

 

Our next industrial mineral challenge will be Wollastonite.
 
Enjoy the adventure!
 
Thanks,
 

R
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